U.S. patent application number 11/328310 was filed with the patent office on 2006-06-22 for window covering leveling mechanism.
This patent application is currently assigned to Pella Corporation. Invention is credited to Jeffrey Scott Belloma, Gabriel P. Gromotka.
Application Number | 20060130980 11/328310 |
Document ID | / |
Family ID | 36594230 |
Filed Date | 2006-06-22 |
United States Patent
Application |
20060130980 |
Kind Code |
A1 |
Gromotka; Gabriel P. ; et
al. |
June 22, 2006 |
Window covering leveling mechanism
Abstract
A window covering leveling mechanism for a moveable rail
actuated by at least one lift cord. The leveling mechanism
including a lift cord adjuster configured for attachment to one end
of the lift cord; and a locking mechanism mountable within the
moveable rail and configured to receive the lift cord adjuster.
Insertion of the cord adjuster attached to the lift cord into the
locking mechanism facilitates leveling of the moveable rail by
adjustment of the lift cord and locking of the lift cord at a
desired length. The cord adjuster may be a zip tie or similar
item.
Inventors: |
Gromotka; Gabriel P.;
(Pella, IA) ; Belloma; Jeffrey Scott; (Pella,
IA) |
Correspondence
Address: |
FAEGRE & BENSON LLP;PATENT DOCKETING
2200 WELLS FARGO CENTER
MINNEAPOLIS
MN
55402
US
|
Assignee: |
Pella Corporation
Pella
IA
|
Family ID: |
36594230 |
Appl. No.: |
11/328310 |
Filed: |
January 9, 2006 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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|
10437773 |
May 14, 2003 |
7021360 |
|
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11328310 |
Jan 9, 2006 |
|
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|
10200579 |
Jul 22, 2002 |
6736185 |
|
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10437773 |
May 14, 2003 |
|
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60642812 |
Jan 11, 2005 |
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Current U.S.
Class: |
160/107 |
Current CPC
Class: |
E06B 9/264 20130101 |
Class at
Publication: |
160/107 |
International
Class: |
A47H 1/00 20060101
A47H001/00 |
Claims
1. A leveling mechanism for a window covering with a moveable rail
actuated by at least one lift cord, the leveling mechanism
comprising: an elongated lift cord adjuster having an engagement
portion and a lift cord attachment member at one end thereof
attachable to the at least one lift cord; and a locking mechanism
mountable within the moveable rail and configured to releasably
engage with the engagement portion on the lift cord adjuster, such
that the location of the lift cord adjuster can be adjusted
relative to the moveable rail to modify an effective length of the
lift cord attached to the lift cord adjuster.
2. The leveling mechanism of claim 1, wherein the elongated lift
cord adjuster can be adjusted relative to the moveable rail to
increase or decrease the effective length of the lift cord.
3. The leveling mechanism of claim 1, wherein the elongated lift
cord adjuster slidingly engages with the locking mechanism.
4. The leveling mechanism of claim 3, wherein the engagement
portion comprises an engagement feature.
5. The leveling mechanism of claim 4, wherein the engagement
feature comprises a plurality of directional teeth and the locking
mechanism permits sliding engagement in only one direction.
6. The leveling mechanism of claim 3, wherein the locking mechanism
comprises a strip retention member configured to engage with the
engagement portion of the lift cord adjuster.
7. The leveling mechanism of claim 1, wherein the moveable rail is
actuated by at least two lift cords and wherein the leveling
mechanism comprises at least two elongated lift cord adjusters and
at least two locking mechanisms mountable within the moveable rail,
such that one of the lift cord adjusters is attachable to one of
the lift cords and is engageable by one of the locking mechanisms
at a first end of the moveable rail and another of the lift cord
adjusters is attachable to another one of the lift cords and is
engageable by another one of the locking mechanisms at a second end
of the moveable rail, with leveling of the moveable rail achieved
by adjustment of either or both of the lift cord adjusters relative
to the moveable rail to modify an effective length of either or
both lift cords.
8. The leveling mechanism of claim 7, further comprising at least
two end caps configured for attachment on the first and second ends
of the moveable rail for covering the locking mechanisms and
elongated lift cord adjusters from external view.
9. The leveling mechanism of claim 7, wherein the moveable rail is
actuated by more than two lift cords and wherein the leveling
mechanism comprises one lift cord adjuster for each lift cord, and
at least two locking mechanisms mountable within the moveable rail,
such that each of the lift cord adjusters is attachable to a
corresponding lift cord and is engageable within one of the locking
mechanisms at the first or second ends of the moveable rail, with
leveling of the moveable rail achieved by adjustment of one or more
of the lift cord adjusters relative to the moveable rail to modify
an effective length of one or more lift cords.
10. The leveling mechanism of claim 1, wherein the elongated lift
cord adjuster comprises a zip strip, a cable tie or a tie wrap.
11. The leveling mechanism of claim 1, further comprising an end
cap configured for attachment on an end of the moveable rail for
covering the locking mechanism and elongated lift cord adjuster
from external view.
12. The leveling mechanism of claim 1, further comprising a lift
cord plug for receiving the lift cord and routing it toward the
elongated lift cord adjuster.
13. A window covering for a fenestration product having a viewing
area, the window covering comprising: at least one lift cord; a
moveable rail actuated by the at least one lift cord so as to
extend or contract across the fenestration product causing the
window covering to cover or uncover the viewing area of the
fenestration product; and a leveling mechanism coupled to the at
least one lift cord and the moveable rail for leveling the moveable
rail, the leveling mechanism including: an elongated lift cord
adjuster having an engagement portion and a lift cord attachment
member at one end thereof, with the lift cord attachment member
attached to the at least one lift cord, and a locking mechanism
mounted within the moveable rail and configured to releasably
engage with the engagement portion on the lift cord adjuster, such
that the location of the elongated lift cord adjuster can be
adjusted relative to the moveable rail to modify an effective
length of the lift cord and provide leveling of the moveable
rail.
14. The window covering of claim 13, wherein the moveable rail
moves from the bottom upward so as to cover the viewing area of the
fenestration product.
15. The window covering of claim 13, wherein the moveable rail
moves from the top downward so as to cover the viewing area of the
fenestration product.
16. The window covering of claim 13, wherein the elongated lift
cord adjuster can be adjusted relative to the moveable rail to
increase or decrease the effective length of the lift cord.
17. The window covering of claim 13, wherein the elongated lift
cord adjuster slidingly engages with the locking mechanism.
18. The window covering of claim 17, wherein the engagement portion
comprises an engagement feature and the locking mechanism engages
the engagement feature.
19. The window covering of claim 18, wherein the engagement feature
comprise a plurality of directional teeth and the locking mechanism
permits sliding engagement in only one direction.
20. The window covering of claim 13, wherein the elongated lift
cord adjuster comprises a zip strip, a cable tie or a tie wrap.
21. A fenestration product comprising: a frame; a viewing area
within the frame; and a window covering coupled to the frame or the
viewing area and configured to cover and uncover the viewing area,
the window covering including: at least one lift cord; a moveable
rail actuated by the at least one lift cord so as to extend or
contract across at least a portion of the fenestration product
causing the window covering to cover or uncover at least a portion
of the viewing area; and a leveling mechanism coupled to the at
least one lift cord and the moveable rail for leveling the moveable
rail, the leveling mechanism including: an elongated lift cord
adjuster having an engagement portion and a lift cord attachment
member at one end thereof with the lift cord attachment member
attached to the at least one lift cord, and a locking mechanism
mounted within the moveable rail and configured to releasably
engage with the engagement portion on the lift cord adjuster, such
that the location of the elongated lift cord adjuster can be
adjusted relative to the moveable rail to modify an effective
length of the lift cord and provide leveling of the moveable
rail.
22. The fenestration product of claim 21, wherein the elongated
lift cord adjuster can be adjusted relative to the moveable rail to
increase or decrease the effective length of the lift cord.
23. The fenestration product of claim 21, wherein the elongated
lift cord adjuster slidingly engages with the locking
mechanism.
24. The fenestration product of claim 23, wherein the engagement
portion comprises at least one engagement feature.
25. The fenestration product of claim 24, wherein the engagement
feature comprise a plurality of directional teeth and the locking
mechanism permits sliding engagement in only one direction.
26. The fenestration product of claim 21, wherein the elongated
lift cord adjuster comprises a zip strip, a cable tie or a tie
wrap.
Description
[0001] This application claims the benefit of provisional patent
application Ser. No. 60/642,812, filed Jan. 11, 2005, and entitled
WINDOW COVERING LEVELING MECHANISM AND METHOD, hereby incorporated
by reference in its entirety, which is a continuation-in-part and
claims the benefit of co-pending U.S. patent application Ser. No.
10/437,773, filed on May 14, 2003 and entitled ONE-WAY DRIVE FOR
WINDOW COVERINGS, which is a continuation-in-part of U.S. Pat. No.
6,736,185 B2, filed on Jul. 22, 2002 and entitled SLIDING OPERATOR
FOR BETWEEN THE GLASS WINDOW COVERINGS.
[0002] The complete disclosures of commonly assigned U.S.
provisional patent applications entitled WINDOW COVERING DRIVE
SYSTEM, Ser. No. 60/642,813 (attorney docket no. 306547); MOVABLE
LIGHT LATCH, Ser. No. 60/642,811 (attorney docket no. 301233); and
WINDOW ASSEMBLY WITH MOVABLE INTERIOR SASH, Ser. No. 60/643,064
(attorney docket no. 295468), are herein incorporated by reference
in their entirety.
[0003] The complete disclosure of commonly assigned U.S. patent
application entitled WINDOW COVERING LEVELING METHOD (attorney
docket no. 313634), filed on the same date herewith and claiming
benefit from the same provisional application, Ser. No. 60/642,812,
filed Jan. 11, 2005, is incorporated by reference.
FIELD OF THE INVENTION
[0004] The present invention relates to window covering actuation
systems, including mechanisms for leveling a moveable rail of the
window covering.
BACKGROUND OF THE INVENTION
[0005] Within the art of fenestration products, such as windows and
doors, it is well known that double panes of glass in a window
provide better insulation than a single pane of glass. The
provision of venetian type blinds or pleated shades between two
panes of glass in a fenestration product is also known in the art
to provide desired window or door coverage. A pleated blind between
window panes is disclosed in the U.S. Pat. No. 4,913,213 to
Schnelker. A venetian or slat blind between panes of glass is
disclosed in the U.S. Pat. Nos. 4,687,040; 4,664,169 and 5,379,825.
In order to utilize such blinds or shades effectively with the
increased insulation of the double glass product, control
mechanisms for lifting, lowering and tilting the blind or shade
from one side of the window must be provided while maintaining the
window seal. The art has provided cords and cables, sometimes
driven by a motor or gear system, as the control mechanism. The
most popular systems route the cord through an aperture drilled
through the interior pane of glass.
[0006] U.S. Pat. No. 4,687,040 to Ball discloses a device for
adjusting the tilt angle of slats of a slat blind positioned
between the panes of glass. The device includes a hole in one pane
of glass and a flexible cable passing through the hole. The cable
is connected to a rectangular member which controls the rotation of
the slats. When the cable is turned by external torque, the slats
are tilted.
[0007] U.S. Pat. No. 4,913,213 discloses a pleated blind between
double window panes and blind control means for raising and
lowering the blind. One embodiment is comprised of an aperture in
one pane of glass and a bolt with a center hole mounted in the
aperture. An actuator cord passes through the bolt hole and further
up and over a screen, if desired, thereby providing an external
control mechanism.
[0008] U.S. Pat. No. 5,379,825 discloses a window blind between
double panes of glass. One embodiment uses a lift cord and a
control cord routed through a hollow screw passing through one of
the panes of glass to provide external control of the blind.
[0009] The prior art has also developed more complicated control
mechanisms that utilize cables and gear systems that pass through
the window frame rather that the glass. U.S. Pat. No. 4,664,169 to
Osaka et al. discloses a device for tilting slats of a venetian
blind between double panes of glass. The device uses electrical
power driving means to move a piezoelectric bimorph device in a
horizontal plane. The piezoelectric bimorph device is mounted to a
block having a threaded bore. The piezoelectric bimorph device
mechanically moves an elongated V-shaped beam under two cross arms
which control the rotation of the slats. When the beam is moved,
the cross arms are tilted, thereby rotating the slats.
[0010] The complicated systems that require control mechanisms to
be mounted in or routed through the window frame are relatively
expensive to manufacture. Furthermore, in many of these systems
gears and motors wear and then slip or fail. Many of these control
devices require a head rail which is too wide to fit between the
panes of those windows whose panes are not more than 3/4 inches
apart. Hence, these systems have never achieved the popularity of
through the glass systems.
[0011] The problems of the prior art systems discussed above are
not present if the control mechanism is a cord or cords routed
between the edge of the interior glass panel and the window frame.
In U.S. Pat. No. 4,913,213, Schnelker describes a pleated blind
between window panes. In one preferred embodiment, the actuator
cord is routed over the glass housing and any screen housing
provided. An L-shaped guide having a single vertical and horizontal
channel cut therein is fitted over the top edge of the glass
housing. An actuator cord passes through the channel. A major
problem with this system is that one cannot maintain a seal between
the window frame and the edge of the glass housing. Another problem
is that most blinds have four control cords, two lift cords and two
tilt cords. If all four cords are routed through a single channel
they tend to bind and interfere with one another.
[0012] In U.S. Pat. Nos. 5,611,381, 6,006,813 and 6,070,638, Jelic
describes a window having a blind between two panes of glass. A
cord guide is provided at the top edge of the housing, with the
cord guide including multiple slots for the lift and tilt cords.
The cord guide maintains a seal between the window frame and the
window panes and keeps the cords separated. However, in this window
system, the blind is still controlled by multiple cords routed
around the window panes, which still tend to present problems for
the user.
[0013] Even when the cord routing has been improved, between the
glass window covering product may still have problems, such as
jamming, when the lift cords experience slack during operation.
These problems may occur when the lift mechanism is used too
briskly or quickly, or when the window covering encounters some
type of obstruction. With the blind located between two glass
panels, resolution of a jam in the lift cord is not an easy matter.
Therefore, lift cord systems and blind actuation mechanisms that
reduce the risk of slack and jamming are preferred.
BRIEF SUMMARY OF THE INVENTION
[0014] The present invention provides a leveling mechanism for a
window covering with a moveable rail actuated by at least one lift
cord. The leveling mechanism includes an elongated lift cord
adjuster having a plurality of engagement features and a lift cord
attachment member at one end thereof attachable to the at least one
lift cord. The leveling mechanism also includes a locking mechanism
mountable within the moveable rail and configured to releasably
engage with the engagement features on the lift cord adjuster. The
location of the lift cord adjuster can then be adjusted relative to
the moveable rail to modify an effective length of the lift cord
attached to the lift cord adjuster. In one embodiment, the lift
cord adjuster is formed from a zip strip or tie wrap. The present
invention also provides a window covering including such a leveling
mechanism, and a fenestration product including a window covering
having a leveling mechanism.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0015] FIG. 1 is a front, interior view of a fenestration product,
such as a window, including a between the glass window covering and
an interior insect screen.
[0016] FIG. 2 is a partial detail view of the window of FIG. 1.
[0017] FIG. 3 is a front, interior view of a window panel removed
from a window frame, including one embodiment of a sliding operator
for a between-the-glass window covering in accordance with the
present invention.
[0018] FIG. 4 is a partial, cut-away view of the panel of FIG.
3.
[0019] FIG. 5 is a partial detail view of the panel of FIG. 3
showing a through-the-glass shaft.
[0020] FIG. 6 is front, interior view of window panel, including
another embodiment of a sliding operator for a between-the-glass
window covering in accordance with the present invention.
[0021] FIG. 7 is an exploded view of one embodiment of the handle
portion of a sliding operator in accordance with the present
invention.
[0022] FIG. 8 is an exploded view of one embodiment of the pulley
and shaft portion of a sliding operator in accordance with the
present invention.
[0023] FIG. 9 is an back, exterior view of a window panel including
a between-the-glass blind and one embodiment of a window covering
actuation system in accordance with the present invention.
[0024] FIG. 10 is a detail, exterior view of a window covering
actuation system.
[0025] FIG. 11 is a detail, interior view of the window covering
actuation system of FIG. 10.
[0026] FIG. 12 is an exploded view of one embodiment of a gear box
usable with a window covering actuation system in accordance with
the present invention.
[0027] FIG. 13 is a perspective view of another embodiment of a
gear box usable with a window covering actuation system in
accordance with the present invention.
[0028] FIG. 14 is an exploded view of the gear box of FIG. 13.
[0029] FIG. 15 is a partial detail, exterior view of a window
covering actuation system, including a lift spool, tilt drum and
clutch/brake assembly.
[0030] FIG. 16 is an exploded view of the clutch/brake assembly of
FIG. 16.
[0031] FIG. 17 is a partial detail, exterior view of a window
covering actuation system, including a tilt drum and gear box.
[0032] FIG. 18 is a partial detail, exterior view of an alternative
window covering actuation system, including another embodiment of a
tilt drum and another embodiment of a gear box.
[0033] FIG. 19 is a partial detail view of one embodiment of a
bottom rail of a blind usable as a between-the-glass window
covering, including a lift cord adjustment system.
[0034] FIG. 20 is a perspective view of a window panel and interior
insect screen attachable to the window panel in accordance with the
present invention, including a sliding screen operator that engages
the sliding operator on the panel.
[0035] FIG. 21 is a partial detail interior view of the screen and
panel combination shown in FIG. 21.
[0036] FIG. 22 is a partial detail exterior view of the screen of
FIGS. 20 and 21.
[0037] FIG. 23 is an exploded view of one embodiment of a drive
assembly usable with the screen sliding operator shown in FIGS.
21-23.
[0038] FIG. 24 is an exploded detail view of one embodiment of a
coupler, as shown in FIGS. 20-22.
[0039] FIG. 25 is an exterior, detail view of another embodiment of
a window covering actuation system, including an alternative
embodiment of a lift spool drive system.
[0040] FIG. 26 is a detail view of the lift spool drive system of
FIG. 25, shown with a spool shroud and cradle.
[0041] FIG. 27 is an exploded view of the lift spool drive system
of FIG. 26.
[0042] FIG. 28 is a perspective view of a window covering moveable
rail including an adjustable leveling mechanism in accordance with
the present invention.
[0043] FIG. 29 is an exploded view of the moveable rail of FIG.
28.
[0044] FIG. 30 is a cross-sectional view of a locking mechanism and
a lift cord adjuster.
[0045] FIG. 31 is a cross-sectional view of another embodiment of a
locking mechanism and a lift cord adjuster.
DETAILED DESCRIPTION OF THE INVENTION
[0046] With reference to the attached Figures, it is to be
understood that like components are labeled with like numerals
throughout the several Figures. FIGS. 1 and 2 are a fenestration
product 40 to be used in accordance with the present invention
having multiple panes of viewing material, including an exterior
pane 41 and an interior pane 42, and an optional interior insect
screen 44, all set within a window frame 46. One or more additional
panes of viewing material, such as double pane 43, may also be
provided as needed to meet the efficiency and esthetic requirements
of the fenestration product 40. As used herein, the term "viewing
material" refers to organic or inorganic materials that provide at
least a partial barrier to the elements through which light can
pass, including for example glass, plexiglass, screening materials,
and the like. The viewing materials can be transparent,
translucent, or partially opaque. Due to long-standing usage in the
art, the terms "glass" and "pane" are synonymous with the term
viewing material.
[0047] The panes of viewing material 41, 42, 43 are mounted within
a sash 50 having a sash head 51, a sash sill 52 and sash jambs 53.
The sash 50 is moveable to open the fenestration product 40 to
allow for air flow into a building in which the fenestration
product 40 is mounted. A handle 45 is commonly used to open and
close the sash 50, when desired. Positioned between the exterior
and interior panes of viewing material, 41 and 42, respectively, is
a window covering 70 that may be adjusted by extending or
contracting the covering 70 and/or by tilting components, such as
slats 72, of the covering 70. Although the disclosed primarily
between two sheets of viewing material, the present window covering
70 can also be used on the interior side of a fenestration product
40 adjacent a single pane of viewing material.
[0048] Although shown as a casement window, the fenestration
product 40 may be any of a number of types products having windows,
including but not limited to openable and non-openable windows,
double-hung windows, windows within doors, sliding glass or patio
doors, or other windows now known or later developed to be mounted
in an architectural opening within a building. Although shown as a
horizontal slat blind, it is to be understood that the window
covering 70 may be any of a number of types of window coverings,
including but not limited to horizontal blinds, vertical blinds, or
other types of blinds, roman shades, pleated shades, honeycomb
shades or other types of shades, any of which are capable of being
extended and/or contracted to provide a desired amount of coverage
for the window, and may be adjusted by tilting slats or other
components of the covering. The window covering may be constructed
from materials that are opaque, partially opaque, or translucent.
For certain applications, the window covering may be constructed
from a transparent material that is treated to block certain
wavelengths of electromagnetic radiation, such as ultraviolet.
[0049] Referring now also to FIGS. 3 and 4, in this embodiment of
the fenestration product 40, the sash 50 includes a removable glass
panel 60, commonly know in the industry as a double glazing panel
or DGP. The glass panel 60 includes the interior glass pane 42
mounted within a panel frame 69 having a panel head 61, panel sill
62 and panel jambs or side walls 63.
[0050] Referring now also to FIGS. 3 and 4, the glass panel 60 is
shown removed from the window frame 46 and without the optional
screen 44, with an interior side 66 of the glass panel 60 facing
forward. As used herein, the term "interior" generally refers to
the side of the fenestration product inside a dwelling or other
building and the term exterior generally refers to the outdoor side
of the product. However, when the fenestration product is mounted
totally inside a building, such as door or window between two
indoor rooms (for example, an office door or window), then interior
refers to the side of the product at which a user would normally
operate the product or a window covering for the product and
exterior refers to the opposite side. Multiple retractable tabs 65
are provided to secure the glass panel 60 within the sash 50.
[0051] Along one panel jamb 63, (in this embodiment shown on the
left side of the glass panel 60, however the other side may also be
used), a sliding operator 80 is provided to control the
extension/contraction and/or other adjustment of the window
covering 70. The sliding operator 80 may be installed within the
panel jamb 63 during formation of the glass panel 60 or,
alternatively, the sliding operator 80 may be provided as an add-on
accessory and attached to the panel jamb 63. In the latter
situation, existing fenestration products 40 already installed in
buildings may be retrofit with the present invention for added
versatility for a consumer.
[0052] The sliding operator 80 includes a handle 87 that slidably
moves along a slide channel 85 formed with a panel jamb 63.
Although shown in one position that is generally perpendicular to
the glass pane 42, the handle 87 may be repositioned generally
parallel to the glass pane 42, if desired, or may be placed in any
other suitable position or location for manipulation and control of
the slide channel 85. The handle 87 is connected to a drive
mechanism 86, such that generally linear movement of the handle 87
along the slide channel 85 results in movement of the drive
mechanism 86. In one embodiment, the drive mechanism 86 includes a
belt, such as a timing belt that may or may not include teeth. The
belt 86 is shown mounted perpendicular to the glass pane 42,
however other mounting configurations are also possible.
Optionally, the drive mechanism 86 may be, but is not limited to, a
chain, perforated tape, rope, cord, or other suitable driving
component.
[0053] At an intersection of panel jamb 63 and the panel head 61, a
pulley enclosure 81 is mounted. Referring now also to FIG. 5,
within the pulley enclosure is a sprocket 83 mounted to a shaft
portion 82 that extends through an aperture 45 in the glass pane
42. Driving mechanism 86 is routed around shaft pulley 83 such that
the shaft pulley 83 engages the driving mechanism 86. Movement of
the driving mechanism 86, by sliding movement of handle 87, thus
results in rotation of shaft portion 82. A seal 89 is configured
around shaft portion 82 to maintain the integrity of space between
the glass panes 52.
[0054] Drive mechanism 86 is routed about a pair of pulleys 84,
also mounted within pulley enclosure 81, which guide the drive
mechanism 86 from the shaft pulley 83 toward the slide channel 85.
In this embodiment, guiding of the drive mechanism 86 by the
pulleys 84 results in about a 90 degree direction change for the
driving mechanism 86. Adjacent to the panel sill 62, a third pulley
88 is positioned so that the drive mechanism 86 routes around it at
an opposite end of the glass panel 60. In this embodiment, the
drive mechanism 86 is configured as a continuous loop, however
other configurations are also possible and within the scope of the
present invention.
[0055] Referring to FIG. 6, an alternative embodiment of a sliding
operator 180 of the present invention is shown for a removable
glass panel 160 including glass pane 142. In this embodiment, the
sliding operator 180 is mounted to the glass pane 142, instead of
being configured as part of a panel jamb, such as jamb 63 as
described above. The sliding operator 180 includes a slide channel
185 in which a driving mechanism 186 is routed. A handle 187 slides
along slide channel 185 providing movement of the driving mechanism
186.
[0056] Adjacent panel head 161, a pulley enclosure 181 is mounted
such that the drive mechanism 186 is routed around a shaft pulley
183 and a pair of pulleys 184. The shaft pulley 183 is mounted on a
shaft 182 that passes through the glass pane 142. In this
embodiment, with the sliding operator 180 mounted on the glass pane
142, the sliding operator 180 may be substantially aligned with the
shaft 182, thereby removing the need for a 90 degree direction
change of the driving mechanism 186, as was described above with
respect to driving mechanism 86.
[0057] Adjacent panel sill 162, a second pulley enclosure 190 is
mounted to the glass pane 142. Within this second pulley enclosure
190, a second pair of pulleys 192 and a third pulley 191 are
positioned to route the drive mechanism 186 in an aligned manner
with respect to the first pulley enclosure 181 and the shaft 182.
In one embodiment, the drive mechanism 186 forms a continuous loop
by attachment at the handle 187, such that movement of the handle
187 generally parallel to the member 163 results in smooth, direct
movement of the drive mechanism 186 and rotation of the shaft
182.
[0058] Although the sliding operator 180 will partially obstruct
the view through the glass pane 142 to some extent, in contrast to
the offset sliding operator 80 located on a panel jamb 63, the
on-glass sliding operator 180 has other advantages. In particular,
although the sliding operator 180 mounted to the glass pane 142 may
be used with any type of fenestration product, it is especially
useful with sliding glass doors, double-hung type windows or other
sliding-type fenestration products. The on-glass mounting of the
sliding operator 180 provides a lower profile for the fenestration
product, and thus accommodates the passing of one component of a
fenestration product relative to a closely adjacent component of
that fenestration product.
[0059] Referring to FIGS. 7 and 8, another alternative embodiment
of a sliding operator 280 is shown including a slide channel 285 in
which a driving mechanism 286 is routed. In this embodiment, the
drive mechanism 286 is a timing belt. A handle 287 slides along
slide channel 285 providing movement of the timing belt 286. A
bracket 288 that mates with the timing belt 286 clamps the ends of
the timing belt 286 at the handle 287 using fasteners 289, thereby
forming a continuous loop of timing belt 286 throughout the sliding
operator 280. A lower pulley 290 is secured by fastener 293 within
a housing 291 that has a back plate 292 and is attached to one end
of the slide channel 285. The lower pulley 290 is mountable at or
near the panel sill (not shown). The timing belt 286 is routed
around the lower pulley 290 forming the lower end of the timing
belt loop. The lower pulley 290 is adjustable within the housing
291 by rotation of fastener 293, such that movement of the lower
pulley 290 toward and away from the panel sill (not shown) adjusts
the tension within the timing belt 286 for efficient operation of
the sliding operator 280.
[0060] A pulley enclosure 281 attached to the other end of the
slide channel 285 is mountable adjacent a panel head (not shown) at
an opposite end from the lower pulley 290. The timing belt 286 is
routed around a corresponding timing belt sprocket 283 and a pair
of pulleys 284 mounted within a pulley housing 296 that is enclosed
by cover 294. The sprocket 283 is mountable to a shaft (not shown),
such as previously described shaft portion 82 that passes through
the glass pane 42. In this embodiment, the sprocket 283 is mounted
on bearings 295 within a shaft housing 297 to facilitate routing
and function of the timing belt 286, which is also aided by roller
299 attached by pin 298 to the shaft housing 297.
[0061] Referring now to FIG. 9, an exterior side 67 of glass panel
60 is shown with a horizontal blind 90 attached. A sealing member
68 is provided around the circumference of the glass panel 60 in
order to seal the glass panel 60 to the sash 50 when the glass
panel 60 is secured to the sash 50 by retractable tabs 65. The
blind 90 includes a plurality of slats 91 that extend generally
from one panel jamb 63 to the other with enough slats 91 to extend
generally from the panel sill 62 (not shown) to an area adjacent
the panel head 61 when the blind 90 is about fully extended. For
clarity in this figure, only a portion of the plurality of slats 91
are shown. It is to be understood, that different configurations of
blinds may also be used in keeping with the present invention.
[0062] In this embodiment, the plurality of slats 91 may be
contracted by retraction of a plurality of lift cords 92, as will
be described in more detail below. The plurality of slats 91 may
also be rotated or tilted from a generally horizontal position (as
shown) to an angled orientation that is somewhat less than
vertical, in either direction, by movement of a plurality of ladder
cords 93, which will also be described in more detail below.
Extension/contraction and angular adjustment or tilting of the
blind slats 91 allows an operator to provide desired light passage
through and coverage of the glass pane 42 of the fenestration
product 40.
[0063] Referring now also to FIGS. 10 and 11, the blind 90 or other
window covering is attached to a window covering actuation system
200 mounted to the glass panel 60 at a head channel 204 adjacent
the panel head 61. The head channel 200 has a general `L` shaped
cross-section formed by a sidewall 205 and a shelf 207. The
sidewall 205 includes an upper hook 206 to aid in mounting the head
channel 200 to the panel head 61. The shelf 207 includes a toe
portion 208 for retaining components 203 of the actuation system
200 in the head channel 204 and, optionally, for connecting these
components 203 to the head channel 204.
[0064] As shown in FIG. 11, on an interior side 202 of the head
channel 204, the sidewall 205 is a generally flat wall providing a
uniform and plain appearance to the interior of a dwelling or other
building for an indoor viewer. Thus, an operator of the blind 90 or
a viewer of or through the fenestration product 40 does not see the
components 203 of the actuation system 200, thereby providing a
more pleasing appearance to the fenestration product 40. As shown
in FIG. 10, however, on an exterior side 201 of the head channel
204, the components 203 may be exposed or may optionally be covered
by another wall (not shown) coupled to the toe 208, the shelf 207
or one or more of the components 203.
[0065] In this embodiment, the components 203 of the actuation
system 200 include two driving shafts, a rotating lift shaft 210
and a rotating tilt shaft 212. For embodiments using a only a
non-tilting window covering, such as a shade, the tilt shaft 212
may be eliminated or provided, but not utilized. The components 203
also include a gear box 220 mounted to the head channel 204 and
coupled to at least the lift shafts 210 at a first end 214. The
actuation system 200 connects to shaft 82 at gear box 220, the
shaft 82 passing through the glass pane 42. The shaft 82, in turn,
is coupled to and driven by sliding operator 80, such that linear
motion of sliding operator 80 results in rotational motion of shaft
82 and corresponding operation of the actuation system 200 by
rotational motion of lift shaft 210.
[0066] Referring now to FIG. 12, one embodiment of the gear box 220
is shown in an exploded view. The gear box 220 includes a housing
221 with a cover 222. A shaft 223 incorporates shaft portion 82
that protrudes through the glass pane 42, as described above. Shaft
223 also includes a first bevel gear 224 mounted to or formed with
the shaft 223. A second bevel gear 225 is mounted with the housing
221 to mate with the first bevel gear 224. A first spur gear 226 is
coupled to, or formed with, the second bevel gear 225, with the
combined gears 225, 226 mounted within the housing 221 so as to
provide an external interface 227 for lift shaft 210. A second spur
gear 228 is also mounted within the housing 221 in a mating
relationship with the first spur gear 227 and so as to provide an
external interface 229 for tilt shaft 212. In operation, when
protruding shaft portion 82 is rotated, rotation of shaft 223 and
the first bevel gear 224 results in rotation of lift shaft 210.
This rotation produces a corresponding rotation in the tilt shaft
212 through the spur gear set 226, 227.
[0067] The combination of the bevel gears 224, 225 and sliding
operator 80 preferably includes an amount of gear reduction, such
that a full range of motion of the window covering 90 is achieved
by relatively less motion of the sliding operator 80. In one
embodiment, this ratio of handle travel to covering travel is about
70 percent. The gear ratio of the gears 224, 225 contributes in
part to this travel ratio. However, also contributing to this
travel ratio is the relationship of the sliding operator 80
structure to the covering actuation structure, as described
below.
[0068] Referring to FIGS. 13 and 14, an alternative embodiment of a
gear box 230 is shown including a housing 231 and a cover 232. A
shaft 233 incorporates shaft portion 82 and a first bevel gear 234.
A second bevel gear 235 is mounted to mate with the first bevel
gear 234 and provide an external interface 237 for the lift shaft
210. One or more bearings 236 supports the external interface 237
within the housing 231. A first ball bearing 238 and a second ball
bearing 239 are also provided to support shaft 233 within the
housing 231. In this embodiment, spur gears or other coupling
mechanisms are not provided as part of the gear box 230 to couple
the rotation of the lift shaft 210 to the rotation of the tilt
shaft 212. Instead, this coupling is provided as another component
203 of the actuation mechanism 200, as described below.
[0069] Referring again to FIG. 10, the actuation system 200 also
includes a plurality of lift spool assemblies 240, preferably in a
number equal to the number of lift cords 92 of blind 90. Each lift
spool assembly 240 includes a lift spool 241 mounted on a support
cradle 242 mounted to and supported by the head channel 204. The
lift shaft 210 passes through each lift spool 241 with the lift
spool 241 coupled to the lift shaft 210 so that rotation of the
lift shaft 210 results in corresponding rotation of the lift spool
241.
[0070] A protective shroud 243 is preferably positioned over the
lift spool 241 to protect the spool 241 and lift cord 92 during
operation, such as from dirt/dust contamination. In addition, the
shroud 243 keeps the lift cord 92 on the spool 241 in the desired
location, thereby minimizing unwanted unwinding and tangling of the
lift cord 92. As the spool 241 rotates, it shifts back and forth
along the lift shaft 210 with respect to the location of the lift
cord 92. As a result, the lift spool 241 retracts into and emerges
out of the shroud 243 as the lift cord 92 winds up or unwinds. The
protective shroud 243 is optionally positioned over only a portion
of the lift spool 241. For example, the protective shroud 243 can
be a discontinuous configuration, such as a plurality of elongated
members or a perforated structure.
[0071] The actuation system 200 further includes a plurality of
tilt drum assemblies 250, preferably in a number equal to the
number of ladder cords 93. Each tilt drum assembly 250 includes a
tilt drum 252 supported by a tilt drum support cradle 251 mounted
to the head channel 204. The tilt shaft 212 passes through each
tilt drum 252 with the tilt drum 252 coupled to the tilt shaft 212
such that rotation of the tilt shaft 212 results in corresponding
rotation of the tilt drum 252. Each tilt drum assembly 250 is
positioned adjacent to a lift spool assembly 240 to facilitate
routing of the adjacent lift cords 92 and ladder cords 93 from the
blind 90, as will be described in more detail below.
[0072] Referring now to FIG. 15, one embodiment of a lift spool 241
is mounted adjacent tilt drum assembly 250 that includes tilt drum
support cradle 251. The lift spool 241 has a spiral groove or
thread 244 (of which only a portion is shown for clarity) about
which the lift cord 92 winds and unwinds upon rotation of the lift
shaft 210 during operation of the actuation system 200. The cradle
251 includes a pair of support legs 253 positioned at either end of
the tilt drum 252. The lift cord 92 passes from the lift spool 241
adjacent the tilt drum 252 and through an aperture 209 formed
within the shelf 207 of head channel 204, along with the ladder
cords 93.
[0073] In order to accommodate the routing requirements of the lift
cord 92, including its passage through aperture 209, the lift cord
92 is preferably formed from monofilament material, including but
not limited to fluorocarbon, nylon, and polyester. The monofilament
produces less friction than conventional cordage materials used for
window coverings, thus resulting in less binding and snagging of
the lift cord 92 during operation of the window covering 90. In
addition, use of monofilament material results in less wear and
thus longer life for the lift cords 92, thereby increasing the
overall life of the window covering 90 itself.
[0074] As the lift shaft 210 rotates, the lift spool 241 also
rotates causing the lift cord 92 to wind up or unwind about the
spool 241, depending on the direction of rotation. With the lift
cord 92 attached to a lower most slat or bottom rail 97 of the
blind 90, movement of the lift cord 92 results in retraction or
extension, respectively, of the blind 90. In order to control the
rotation of the lift shaft 210 in both directions, a clutch/brake
mechanism 270 is coupled to the lift shaft 210 at a second end 215.
In this embodiment, the clutch/brake mechanism 270 is supported by
a mechanism support 271 mounted to the head channel 204 at shelf
207. In one embodiment, the clutch/brake mechanism 270 is a spring
clutch, however, other types or configurations of clutch and brake
mechanisms may also be used.
[0075] Referring now also to FIG. 16, clutch/brake mechanism 270
includes not only a first shaft mounting 272 for lift shaft 210,
but also a second shaft mounting 274 for tilt shaft 212. First
shaft mounting 272 is provided within first spur gear 273, which is
in turn adjacent to and engaged with a second spur gear 275 that
includes second shaft mounting 274. As lift shaft 210 rotates and
is controlled by clutch/brake mechanism 270, rotation of the first
spur gear 272 causes a corresponding rotation in second spur gear
275, resulting in rotation of the tilt shaft 212.
[0076] Clutch/brake mechanism 270 also includes the support housing
271 that is mountable to the head channel 204. Configured to mount
within the support housing 271 are a clutch drum 276, coupled to a
brake drum 278. The brake drum 278 also couples with a brake spring
279 that is, in turn, keyed to the support housing 271. The clutch
drum 276 also couples to a clutch spring 277 that is in frictional
contact with the brake drum 278 and the clutch drum 276. When the
window covering 90 is being lowered or trying to lower itself under
its own weight, the clutch spring 277 cinches down on the brake
drum 278, resulting in the rotation of the brake drum 278 and
subsequent cinching of the brake spring 279. The brake spring 279
applies enough resistance to prevent the window covering 90 from
dropping under its own weight, but does not inhibit deliberate
lowering of the window covering 90 by a user using the slide
operator 80. When the window covering 90 is being raised or
operated in the other direction, the clutch spring 277 spreads
open, disengaging the brake drum 278 from the clutch drum 276.
Alternatively, the engagement between the lift shaft 210 and tilt
shaft 212 may occur at the gear box, as will be described in more
detail below with respect to FIGS. 17 and 18.
[0077] As described above, each tilt drum assembly 250 is
preferably positioned adjacent a lift spool assembly 240 to
facilitate routing of the lift and ladder cords 92, 93, as stated
above. Referring now also to FIG. 17, one of the tilt drum
assemblies 250 is shown with ladder cord 93 attached, but with the
adjacent lift spool assembly 240 not shown for clarity. The ladder
cord 93 includes two side cords 94 and a plurality of cross cords
95 spanning between the side cords 94 and positioned under each
blind slat 91. The side cords 94 extend upward through aperture 209
formed within the shelf 207 of head channel 204. In one embodiment,
these two cords 94 are wrapped around the tilt drum 252 from
opposite sides, but are not secured to the drum 252. Alternatively,
the cords 94 may be secured to tilt drum 252, if desired. The
ladder cords 93 are preferably formed from conventional materials,
including but not limited to braided polyester.
[0078] When the tilt drum 252 is rotated by rotation of the tilt
shaft 212, one side cord 94 will lift upward and the other cord 94
will move downward. As a result, the cross cord 95 will tilt,
causing the slat 91 supported by the cross cord 95 to tilt, as
well. Depending on the direction of rotation of the shaft 212 and
drum 252, the slat 91 will tilt in either direction.
[0079] As was described above, in the present invention, rotation
of the tilt shaft 212 results from rotation of the lift shaft 210
due to coupling of the shafts 210, 212 together, such as by gears
located at the clutch/brake mechanism or at the gear box. In the
embodiment shown in FIG. 17, this coupling of the lift and tilt
shafts 210, 212 occurs at a gear box 260 that includes a first gear
(not shown) mounted to lift shaft 210 within a housing 261 and a
second gear 265 mounted to tilt shaft 212 and coupled to the first
gear. The lift shaft 210 may rotate around many times during the
raising and/or lowering of the blind slats 91. However, only
partial rotation of the tilt shaft 212 and tilt drum 252 are
necessary to produce the desired amount of tilt for the blind slats
91. In order to accommodate the different rotational requirements
of the lift and tilt systems, the side cords 94 are wrapped about
the tilt drum 252 in such a way that there is enough friction
between the drum 252 and cords 94 to tilt the slats 91 as the drum
252 rotates. However, there is not enough friction to prevent the
drum 252 from continuing to rotate after the slats 91 have tilted
to their limit, in one direction or the other. Reversing rotation
of the lift shaft 210 will repeat the process in the opposite
direction.
[0080] Referring to FIG. 18, an alternative embodiment is shown in
which the ladder cord 93 is attached to a tilt drum 292 at side
cords 94. In order to accommodate full rotation of the lift shaft
210, an alternative gear box 280 is provided including a first spur
gear 286 coupled to the lift shaft 210 and a second spur gear 288
coupled to the tilt shaft 212. In this embodiment, the second spur
gear 288 includes a circumferential toothless area 289 without gear
teeth. The second spur gear 288 is positioned relative to the first
spur gear 286, such that the second spur gear 288 reaches the
toothless area 298 at a tilt limit of the slats 91, thus allowing
the first spur gear 286 and lift shaft 210 to continue rotating
without rotating the tilt shaft 212 or drum 252. In a like manner,
a reversal of direction by the lift shaft 210 results in tilt
movement of the slat 91 in the opposite direction until the other
tilt limit is reached. As would be apparent to one of skill in the
art, other mechanisms for coupling the tilt drum 252 and tilt shaft
212 to the lift shaft 210 to achieve the desired range of motion
are also possible and are within the spirit and scope of the
present invention.
[0081] The present invention provides a fenestration product having
a window covering that is operated and adjusted by a sliding
operator on the interior side of the product. No interior cords are
provided or required to operate or adjust the window covering. The
window covering of the present invention is particularly well
suited for between-the-glass applications, but can also be used on
the interior of a fenestration product. The present invention thus
simplifies the window covering's operation and eliminates unsightly
and potentially hazardous cords. By operation of the single sliding
operator, both expansion/contraction and tilt adjustment of the
window covering may be achieved.
[0082] With many types of window coverings usable with a
fenestration product, lift or contraction of the covering is
achieved by using lift cords, such as lift cords 92 described
above. In the situation where control cords are provided, the
control cords are commonly usable to adjust both the position and
level of the bottom rail, such as bottom rail 97 shown in FIG. 9.
If one lift cord is shortened or lengthened differently than one or
more other lift cords, the level of the bottom rail will be
affected and it will not be generally horizontal. Level adjustment
of the bottom rail usually then requires adjustment of the lift
cords by the control cords. However, for window coverings without
external cord control, such as those used in conjunction with the
present invention, leveling of the bottom rail may be difficult to
manage.
[0083] Referring now to FIG. 19, one embodiment of a bottom rail
300 is shown, including a bottom rail channel 301. For standard
window coverings (not shown), the lift cords are knotted or
otherwise secured within the bottom rail channel 301 requiring
adjustments to the cords to be made at drive system at the top of
the window covering. In this embodiment, each lift cord 302 enters
the bottom rail channel 301 and passes through a T-plug 303 that
routes the lift cord 302 in about a 90 degree direction change,
generally from vertical to horizontal. In addition, the T-plug 303
may be used to secure a corresponding ladder cord (not shown) to
the bottom rail 300. In one embodiment, the bottom rail channel 301
is covered by a lowest slat (not shown) of the window covering
[0084] From the T-plug 303, the lift cord 302 is routed to and
attached to a cord adjuster 304. For window coverings having
multiple lift cords 302, multiple cord adjusters 304 may be
provided. For window coverings with two cords 304, two cord
adjusters 304 are provided, preferably with one at each end of the
bottom rail 300. For wider window coverings normally having four
lift cords 304, four cord adjusters 304 are provided, preferably
with two at each end, as shown. The cord adjuster 304 is configured
to move in at least one direction, so as to pull on the attached
lift cord 302. Optionally, the cord adjuster 304 may be configured
to move in two directions, so as to provide more versatility in
adjustment and/or readjustment of the lift cord 304 and, thus, the
level of the bottom rail 300. Cord adjuster 304 may be formed as a
strip, rod or other suitable item for attachment to the lift cord
302 and adjustable movement within the bottom rail channel 301. In
one embodiment, as shown in FIG. 20, the cord adjuster 304 is a
strip having notches or teeth 305, such as a zip tie.
[0085] Cord adjuster 304 is mounted within bottom rail channel 301
adjacent to and engaged with a locking mechanism 306. Locking
mechanism 306 is configured to allow the cord adjuster 304 to move
in one direction and to prevent movement in the other direction.
Alternatively, the locking mechanism 306 may be configured for
releasable engagement of the cord adjuster 304, so that movement of
the cord adjuster 304 may occur in more than one direction upon
release of the locking mechanism 306. In one embodiment, the
locking mechanism 306 is a locking tab (not shown), either fixed or
releasable, that engages the notches or teeth 305 of the cord
adjuster 304. This locking mechanism 306 may be formed from
plastic, nylon, metal or other light, but suitable materials.
Alternatively, the locking mechanism 306 may be configured for use
with a cord adjuster 304 without notches or teeth 305, and may be
either fixed or releasable. This mechanism 306 may be formed from
plastic, metal or other suitable materials.
[0086] In the embodiment shown in FIG. 19, the locking mechanism
306 is provided as part of an end cap 308 for the bottom rail 300.
The end cap 308 may be configured so that the cord adjusters 304
pass through one or more apertures 309 in the end cap 308.
Protruding portions 307 of the cord adjusters 304 may then be
trimmed flush with the end cap 308 once adjustment to the lift
cords 302 has been made, if desired in some embodiments. However,
configurations with the cord adjusters 304 completely internal to
the bottom rail channel 301 and/or separate from the end cap 308
are also possible.
[0087] In operation, once the window covering is mounted in place,
the lift cords 302 may be adjusted by movement of the cord
adjusters 304, so as the shorten or lengthen the lift cords 302.
Adjustment of the lift cords 302 results in leveling adjustment of
the bottom rail 300, as desired.
[0088] As shown in FIG. 1, many fenestration products 40 include an
optional interior insect screen 44 that may be removably positioned
over the glass panel 60 from inside a room or building. For
fenestration products 40 that include a sliding operator 80 of the
present invention for manipulation and control of a
between-the-glass window covering 70, standard installation of the
interior insect screen 44 would block a user's access to the
sliding operator 80 and thus inhibit the user's control and
operation of the window covering 70.
[0089] Referring now to FIGS. 20-24, a screen assembly 400 is shown
mounted on an interior side of glass panel 60. The screen assembly
400 includes frame 405 having side members 406, head member 407 and
sill member 408. Mounted within the frame 405 is an insect screen
409. One of the side members 406 includes a screen operator 410,
including handle 411 mounted on an interior side 401 of the screen
assembly 400 for slideable movement within channel 412. A coupler
420 is also mounted for slideable movement along coupler channel
425 on the same member 406, but on an exterior side of 402 of
screen assembly 400. Movement of the coupler 420 is tied to
movement of the handle 411, such that as handle 411 is slid along
channel 412, a drive assembly 414 produces corresponding sliding
movement of the coupler 420 along coupler channel 425. In this
embodiment, the handle 411 and coupler 420 are offset from one
another and driven in opposite directions from one another. As the
handle 411 is slid through a full range of motion on screen
assembly 400, the coupler 420 also moves through a full range of
motion.
[0090] When the screen assembly 400 is positioned against the glass
panel 60, the coupler 420 engages slide operator handle 87. As best
shown in FIGS. 21 and 24, coupler 420 includes first and second
portions, 422 and 424, respectively, between which the handle 87 is
interposed upon installation of the screen assembly 400. Thus,
movement of handle 411 along slide channel 412 correspondingly
moves coupler 420 along coupler channel 425 through drive assembly
414, resulting in lift and tilt operation of the window blind (not
shown) by movement of handle 87.
[0091] In one embodiment, as shown in FIG. 23, the drive assembly
414 includes a drive mechanism 415, such as a cord, chain, belt,
tape, or other suitable device. The drive mechanism 415 is
preferably routed about a pulley 416 rotatable about a shaft, pin
or other axis 417. In this embodiment, the pulley 416 is housed
within a corner coupler 418 holding side member 406 to head member
407. A cap or cover 419 may be included as needed to maintain the
pulley 416 within the corner coupler 418 and/or for decorative
purposes. The drive mechanism 415 is preferably a continuous loop
connected at both ends to the coupler 420.
[0092] In one embodiment, shown best in FIG. 24, a first end 426 of
the drive mechanism 415 attaches to the coupler 420 with a knot 427
or other suitable fastening device. A second end 428 of the drive
mechanism 415 attaches to a tensioner 423 provided within the first
portion 422 of the coupler 420. The tensioner 423 is configured
with a plurality of teeth 430 that engage with a plurality of
corresponding snap ends 431 in first portion 422. The second end
428 is threaded into and secured to tensioner 423, which is then
snapped into first portion 422 such that the teeth 430 engage snap
ends 431. Rotation of the tensioner 423 within the first portion
422, preferably by use of screw drive slot 432, results in an
adjustment to the tension in the drive mechanism 415 so as to
maintain adequate control over movement of the coupler 420 and,
thus, the handle 87.
[0093] The present invention provides numerous advantages over
other window covering systems. The present invention includes a
number of subsystems, such as the sliding operator, the window
covering and the window covering actuation system coupled together
by a shaft passing through the glass panel for between-the-glass
applications. These subsystems may be decoupled for ease of
maintenance, repair, removal, cleaning, etc. The glass panel may be
removed from the window sash and frame, with the sliding operator,
the window covering actuation system and the window covering being
removed along with the panel. Any of these subsystems may thus be
dealt with as needed.
[0094] In addition, decoupling of the sliding operator from the
window covering actuation system at the shaft allows for
adjustment/readjustment of the sliding handle position relative to
the overall window/fenestration product. In operation, a user may
tip the window covering to disengage the shaft from the sliding
operator, move the handle to a desired position, and then re-engage
the shaft and sliding operator. With the gear reduction built into
the sliding operator and window covering actuation system
interface, the sliding handle may be repositioned along the length
of the sliding channel to accommodate the user's needs. For
example, in tall windows, the sliding operator handle may be
positioned at the lower end of the channel because the upper end is
out of reach of the average user. Alternatively, in doors, the
sliding operator handle maybe positioned at the upper range of the
channel because it is harder to stoop down low near the floor. For
standard windows, on the other hand, it may be desirable to have
the handle positioned in the middle of the available range of
channel length. With the insect screen sliding operator of the
present invention, the range of motion and position of the screen
sliding handle may also be readjusted to match the range and
position of the sliding operator on the fenestration product.
[0095] Fenestration products with adjustable coverings, also known
as window coverings, for example those shown and described above,
are commonly subjected to various forces that may cause problems
with the lift and tilt mechanism. Such forces may result in the
window covering becoming jammed or stuck during upward or downward
travel. In particular, the lift cord may slacken when the window
covering encounters an obstacle or the actuation system is actuated
too quickly. Slack in the lift cord may cause it to become
disengaged with the winding mechanism and tangle or snarl. Attempts
to rectify the situation may additionally cause damage to the lift
cords, or other actuation system components. For window coverings
mounted between glass window panels, jamming of the window covering
and component damage cause further problems because the window
covering is not readily accessible by the user for readjustment
and/or repair.
[0096] Referring now to FIGS. 25-27, another view of the window
covering actuation system 200 is shown, similar to that shown in
FIG. 10. The system 200 includes multiple components 203, including
lift shaft 210, tilt shaft 212, gear box 220, and clutch &
brake 270. In addition, two lift spool assemblies 240 are mounted
to engage the lift shaft 210, and two tilt drum assemblies 250 are
mounted adjacent the lift spool assemblies 240 engaging the tilt
shaft 212. The lift spool assemblies 240 each include the same or
similar protective shroud 243 and support cradle 242.
[0097] In this embodiment, however, the lift spool 241 is replaced
by a lift spool drive system 500, including a modified lift spool
501. The modified lift spool 501 includes an exterior thread or
groove 502 similar to the spiral groove 244. In addition, the
modified lift spool 501 includes a hollow bore 503 extending
throughout a length 506 the spool 501. A plug 510 is configured to
be inserted into a first end 504 of the modified spool 501. The
plug 510 has an interior center bore hole 511 extending through it,
sized to allow for free rotation of the lift shaft 210 as it passes
through the plug 510. In addition, it includes an axially extending
notch 512 configured to allow passage of the lift cord 92 while
capturing a knot (not shown) at the end of the lift cord 92. This
notch 512 also provides a keying function for the plug 510 relative
to the spool 501 to ensure angular alignment of the plug 510. In
one embodiment, the plug 510 is formed from a polymer, such as an
equivalent material to that used for the modified lift spool 501;
however, other suitable materials may also be used, as would be
known by one skilled in the art.
[0098] At a second end 505, the modified spool 501 includes an edge
notch 507 configured to mate with a spool stop 516 on a nut 515.
The spool stop 516 extends radially from the nut surface, as well
as axially from a leading edge 519 of the nut 515. A slightly
undercut flat region 518 is formed adjacent the spool stop 516. The
nut 515 is received within and adhered to the bore 503, such that
it is generally flush with the second end 505, except for the spool
stop 516. An interior threaded bore 517 extends through the nut
515, with the interior threads configured to mesh with exterior
threads 521 on a drive rod 520. The nut 515 and drive rod 520 are
preferably formed from brass or other suitable materials, including
but not limited to plastic or zinc die cast construction.
[0099] The rod threads 521 extend along a majority of a rod length
522, except for an end region 523. In one embodiment, this end
region 523 is preferably knurled, however, a smooth end region 523
may alternatively be provided. The drive rod 520 has an interior
bore 524 extending the length 522 of the rod 520. At least a
portion of the bore 524 is configured to mate with the lift shaft
210, so that rotation of the lift shaft 210 results in rotation of
the rod 520 in either direction. In this embodiment, the bore 524
is generally square in cross-section to accommodate the generally
square lift shaft 210, at least in the area of the end region
523.
[0100] A stop collar 525 is fitted about the end region 523 of the
drive rod 520 by insertion of the end region 523 into an interior
through-bore 526 of the stop collar 525. The stop collar 525 is
prevented from rotating due to attachment to the rod 520, such as
by a press-fit between the collar 525 and end region 523, adhesive
or by other suitable methods. A knurled end region 523 aids in
securing the stop collar 525 to the rod 520. The stop collar 525
includes a drive stop 527 that extends radially from the outer
collar surface, as well as axially from a back edge 529 of the
collar 525. A slightly undercut flat region 528 is formed adjacent
the drive stop 527. The stop collar 525 is also preferably formed
from brass, or from another suitable material.
[0101] The drive rod 520 threads into and out of the modified spool
501 upon rotation of the lift shaft 210. In this embodiment, inward
movement is caused by clockwise rotation and outward movement is
caused by counter-clockwise rotation; however, reversed threads are
also possible. Near the clockwise/inward rotational limit of the
drive rod 520 into the spool 501, the drive stop 527 of the stop
collar 525 encounters the spool stop 516 as the spool stop 516
passes over the flat region 528 on stop collar 525. Rotation of the
drive rod 520 relative to the spool 501 then ends, and continuing
rotation of the lift shaft 210 in the clockwise direction results
in generally simultaneous rotation of both the drive rod 520 and
the spool 501.
[0102] A reversal in the direction of rotation of the lift shaft
210, that is a change to a counter-clockwise direction in this
embodiment, causes a disengagement of the spool stop 516 and drive
stop 527. As a result, the lift shaft 210 and drive rod 520 freely
rotate with respect to the spool 501, such that the spool 502 is
not driven by the lift shaft 210 in a counter-clockwise direction.
Another change in rotational direction and movement of the drive
rod 520 back to its limit, such that the drive stop 527 and spool
stop 516 engage, are required before the lift shaft 210 again
drives the spool's rotation.
[0103] In operation, the drive rod 520 is preferably at its inward
most position with respect to the modified spool 501, such that the
drive stop 527 and spool stop 516 are engaged. As the window
covering 90 is lifted or opened, the lift shaft 210 rotates
clockwise, also rotating the drive rod 520 and modified lift spool
501 causing the lift cord 92 to be wound up about the thread or
groove 502 under the shroud 243. As the window covering 90 is
lowered or closed, the lift shaft 210 rotates counter-clockwise,
releasing the clutch/brake 270 and allowing the window covering 90
to drop under its own weight. As a result, the lift cord 92 unwinds
from the modified lift spool 501 causing it to rotate
counter-clockwise in conjunction with the rotation of the lift
shaft 210. Therefore, the drive rod 520 rotates along with the
spool 501 and the drive stop 527 and spool stop 516 remain
engaged.
[0104] During lowering of the window covering 90, the window
covering 90 may encounter an obstruction, such as a loose muntin
bar or other object, or the window covering 90 may be operated too
quickly, such that slack is formed in the lift cords 92. In other
embodiments of the window covering actuation system 200, the
continuing movement of the operator causes the lift shaft 210 to
continue rotating and the lift spool 241 to also continue rotating.
As a result, the lift cords 92 wound around the lift spools 241 get
snarled, tangled, jammed and/or otherwise messed up, which may
cause permanent damage to the cords or the system. In this
embodiment, however, once slack is encountered in the lift cords
92, the modified lift spool 501 stops rotating, but the lift shaft
210 continues to rotate along with the drive rod 520. The drive rod
520 unscrews from the modified lift spool 501 as long as the lift
shaft 210 continues to rotate in that direction due to continued
operation of the window covering operator. The drive rod 520, as
shown in this embodiment, is configured with fine enough threads so
that, should a problem be encountered at the top most position of
the window covering 90, there are sufficient threads to allow for
complete operation of the window covering operator to its lowermost
limit on smaller fenestration products or up to five feet (1.52
meters) of travel on larger units. More threads may be provided for
larger fenestration products, as desired.
[0105] Once the obstruction is cleared or the problem is otherwise
resolved, operation of the window covering 90 may proceed. As
stated above, reversal of direction of the operator results in
reversed rotation of the lift shaft 210, along with the drive rod
520. The modified spool 501 does not start rotating until the drive
rod 520 reaches its inward limit and the drive stop 527 engages the
spool stop 516. As a result, the angular orientation of the
modified spool 501 remains in sync with the other lift spools 501
within the overall actuation system 200, and thus rotation
registration between the separate lift spool assemblies 240 is
maintained. Therefore, misalignment of the window covering 90 is
avoided.
[0106] In this embodiment, one way drive of the modified spool 501
is provided by the nut 515 and spool stop 516 working in
conjunction with stop collar 525 and drive stop 527. However, it is
to be understood that other mechanisms for limiting rotational
movement of the drive rod 520 in one direction may also be
provided. One alternative embodiment includes configuration of the
mechanism with left hand threads for rotation in an opposite
direction from the mechanism set forth above. Other embodiments of
the mechanism include, but are not limited to, construction of the
spool 501, nut 515 and spool stop 516 as one integral unit or
single part, and/or the construction of the drive rod 520, stop
collar 525 and drive stop 527 as one integral unit or single part.
These types of parts may be molded and/or machined. Variations of
this same concept are also possible. In addition, other
embodiments, in which the spool 501 and drive rod 520 interconnect
for coordinated rotation in one direction, yet are separate for
independent rotation in an opposite direction, are within the skill
of those in the art and are covered by this invention.
[0107] The lift spool drive assembly of the present invention
provides the benefit of resolving a problem frequently encountered
with window covering operation, while fitting within the confines
of the current actuation system. In particular, in actuation
systems provided for between-the-glass window coverings, the
available envelope of space for the components of the actuation
system is very limited. Therefore, the provision of a mechanism for
resolving this problem is most useful and efficient if it is
confined to the provided space and does not extend beyond the
existing actuation components. In addition, when used with
between-the-glass window coverings having the sliding operator, as
described above, the tilt function of the window covering may be
operated without raising or lowering the covering at its lower
limit of travel. When the window covering reaches its lower limit,
continuing movement of the sliding operator results in
disengagement of the drive screws from the lift spools and permits
the operator handle to travel in either direction without raising
or lowering the shade.
[0108] Referring now to FIGS. 28-31, an alternative embodiment of a
window covering moveable rail 600 is shown including a rail channel
601 having a channel opening 602. In this embodiment, a lift cord
603 is shown being routed from the remainder of the window covering
for use in raising and/or lowering the window covering material.
This window covering is not shown, but would be similar to those
shown and described above and would raise/lower or extend/contract
with a moving rail at the moving end of the window covering so as
to cover or uncover the window. As shown and described above, the
window covering may be a venetian blind, mini-blind or other
horizontal-type blind, an accordion pleated shade, a honey-comb
shade or other shade. In addition, the window covering may be fixed
at the top and extend downward, or it may be fixed at the bottom
and extend upward. Other window covering styles requiring the
leveling of a moving rail may also be used in conjunction with the
present invention.
[0109] In this embodiment, the moveable rail 600 includes an
adjustable leveling mechanism 610 mounted within the rail channel
601 for use in adjusting the level of the moveable rail 600 easily
and simply, similar to the embodiment shown and described in FIG.
19. In the illustrated embodiment, the lift cord 603 connects to
the leveling mechanism 610 by passing through a T-plug 612 at
opening 613. The T-plug 612 is positioned within the rail channel
601 at opening 604. The lift cord 603 then is directed toward and
connected to a cord adjuster 615 at a attachment end 616. Similar
to the description above with respect to FIG. 19, a plurality of
lift cords 603 may be adjusted by providing a plurality of cord
adjusters 615, as needed to meet the leveling needs of a particular
window covering.
[0110] In the illustrated embodiment, the cord adjuster 615 is a
zip strip, a cable tie, a tie wrap or other similar component. As
used herein, "zip strip" refers to an elongated member that
slidingly engages with a locking mechanism, preferably in only one
direction. Zip strips have the advantage of being low cost and
having a high tensile strength. In a preferred embodiment, the cord
adjuster 615 includes a plurality of engagement features, such as
directional teeth 617, formed on or into an engagement portion 619.
However, other configurations with or without teeth, such as those
described above with reference to FIG. 19, are also possible and
within the scope of the present invention.
[0111] The cord adjuster 615 can be any mechanical mechanism
adapted to adjust the effective length of the lift cord 603, such
as for example the attachment end 616 movably coupled to a worm
gear or a rotating drum with a ratcheting mechanism to permit
rotation only in one direction. In one embodiment, the directional
teeth 617 are fixed and the attachment end 616 can be displaced
along the direction teeth 617. The effective length of the lift
cord refers to a distance between an upper surface of the movable
rail 600 to a lower surface of the actuation system 200.
[0112] In one embodiment, a leveling mechanism 610 is located at
each end of the moveable rail 600 and is adapted to adjust one or
more lift cords 603. In another embodiment, a single leveling
mechanism 610 is located at only one end of the moveable rail 600
and is adapted to adjust one or more lift cords 603. In this
embodiment, the leveling mechanism 610 is preferably adapted to
increase or decrease the effective length of each lift cord
603.
[0113] The illustrated cord adjuster 615 engages a locking
mechanism 620, which is received within the channel opening 602 of
the rail channel 601. The locking mechanism 620 includes a mounting
portion 621 having a split plug 622 protruding from one side. The
locking mechanism 620 is held in position within the channel
opening 602 by engagement of the split plug 622 with a hole or
other opening 605 in the rail channel 601. The locking mechanism
620 also includes a strip retention portion 623 having one or more
strip retention members 625 provided within one or more strip
openings 624.
[0114] In operation, the lift cord 603 is threaded through the
opening 613 on the T-plug 612 and is attached to the cord adjuster
615. The cord adjuster 615 is then inserted into and through one of
the strip openings 624, such that the strip retention members 625
engage with the engagement portion 619, for example with teeth 617
of the cord adjuster 615. When leveling of the moveable rail 600 is
desired, the cord adjuster 615 is pulled through the strip opening
624 until the desired effective length of the lift cord 603 is
achieved. The directional nature of the teeth 617 discourages
movement of the cord adjuster 615 in the opposite direction, such
that the lift cord 603 is held in the desired position. Once a
level moveable rail 600 is achieved, a portion 618 of the cord
adjuster 615 protruding out of the strip retention portion 623 on a
side opposite the T-plug 612 may be trimmed off so that it doesn't
extend beyond the end of the locking mechanism 620, or so that it
doesn't interfere with other components of the leveling mechanism
610 or the moveable rail 600. An end cap 630 is then placed into
the channel opening 602 against the end of the rail channel 601,
thereby covering up the leveling mechanism 610 from view, in
contrast to the end cap 308 shown in FIG. 19.
[0115] Referring to FIG. 31, another embodiment of a cord adjuster
655 is shown including a generally smooth elongated portion 659
that engages with locking member 660. The elongated portion 659 is
shown including a plurality of optional frictional components 657.
In a manner similar to the locking mechanism 620 described above,
the locking mechanism 660 includes a strip retention portion 663
having one or more strip retention members 665 provided within one
or more strip openings 664. In operation, the elongated member 659
of cord adjuster 655 is passed through the opening 664 in the strip
retention portion 663. A strip retention member 655 then engages
directly with the elongated member 659. The frictional components
657 aid in retention of the cord adjuster 655, but do not generally
provide the engagement with the locking mechanism 660. Other types
of engagement between the cord adjuster and the locking mechanism
are also contemplated and within the scope of the present
invention.
[0116] Although generally described with respect to
between-the-glass window covering products, use of the present
invention is not limited to between-the-glass window covering
units. Instead, it may used and benefit other type of window
covering configurations usable with other types of windows or
fenestration products, including but not limited to window
coverings mounted adjacent but external to a window or fenestration
product.
[0117] All of the patents and patent applications disclosed herein,
including those set forth in the Background of the Invention, are
hereby incorporated by reference. Although the present invention
has been described with reference to preferred embodiments, workers
skilled in the art will recognize that changes may be made in form
and detail without departing from the spirit and scope of the
invention. In addition, the invention is not to be taken as limited
to all of the details thereof as modifications and variations
thereof may be made without departing from the spirit or scope of
the invention. Further, the various embodiments described include
numerous components which may be provided in various combinations
to achieve similar functionality. All such combinations are within
the scope of the present invention. Also, various of the components
may be eliminated from one or more embodiments to achieve the same
function, as described above. Thus, the scope of the present
invention should not be limited to the structures described in this
application, but only by the structures described by the language
of the claims and the equivalents of those structures.
* * * * *