U.S. patent application number 12/244362 was filed with the patent office on 2010-04-08 for wall-avoiding convertible ottoman.
This patent application is currently assigned to L & P PROPERTY MANAGEMENT COMPANY. Invention is credited to Gary Masters, Glenn N. Wiecek.
Application Number | 20100084895 12/244362 |
Document ID | / |
Family ID | 42026913 |
Filed Date | 2010-04-08 |
United States Patent
Application |
20100084895 |
Kind Code |
A1 |
Wiecek; Glenn N. ; et
al. |
April 8, 2010 |
WALL-AVOIDING CONVERTIBLE OTTOMAN
Abstract
This invention is related to an ottoman convertible to a seating
unit comprising a back-support assembly, a seat-support assembly, a
base frame, and a pair of opposed armrests. Additionally, the
ottoman includes a linkage system comprising a plurality of
pivotably interconnected linkages, where the linkage system is
configured to rotatably couple the seat-support assembly to the
back-support assembly, and translatably couple the seat-support
assembly and the base frame. In operation, this furniture piece is
moveable between a closed position, resembling an ottoman, and an
open position, wherein the back-support assembly forms the backrest
of a seating unit accessible to a seated occupant. Specifically,
the pivotably interconnected linkages operate such that rearward
rotational movement of the back-support assembly induces forward
translation of the seat-support assembly in relation to the base
frame. This movement coincidentally induces the pair of opposed
armrests to raise.
Inventors: |
Wiecek; Glenn N.;
(Shelbyville, KY) ; Masters; Gary; (Shelbyville,
KY) |
Correspondence
Address: |
SHOOK, HARDY & BACON LLP;INTELLECTUAL PROPERTY DEPARTMENT
2555 GRAND BLVD
KANSAS CITY
MO
64108-2613
US
|
Assignee: |
L & P PROPERTY MANAGEMENT
COMPANY
South Gate
CA
|
Family ID: |
42026913 |
Appl. No.: |
12/244362 |
Filed: |
October 2, 2008 |
Current U.S.
Class: |
297/118 ; 108/11;
297/463.1 |
Current CPC
Class: |
A47C 3/16 20130101; A47C
13/00 20130101; A47C 9/00 20130101 |
Class at
Publication: |
297/118 ; 108/11;
297/463.1 |
International
Class: |
A47C 13/00 20060101
A47C013/00; A47C 31/00 20060101 A47C031/00 |
Claims
1. An ottoman convertible to a seating unit, the ottoman
comprising: a base frame having a slide mechanism; a seat-support
assembly being slidably engaged with the base frame at the slide
mechanism; a back-support assembly having an underside; a linkage
system comprising a plurality of pivotably interconnected linkages,
the linkage system being configured to rotatably couple the
seat-support assembly to the back-support assembly, the linkage
system further configured to translatably couple the seat-support
assembly and the base frame; wherein the back-support assembly is
moveable between a closed position, in which the underside of the
back-support assembly substantially overlies the seat-support
assembly and faces generally downwardly, and an open position, in
which the back-support assembly is oriented substantially upright
in relation to the seat-support assembly and the underside of the
back-support assembly faces generally forwardly.
2. The ottoman of claim 1, wherein the seat-support assembly is
moveable between the closed position, in which the seat-support
assembly substantially overlies the base frame, and the open
position, in which a portion of the seat-support assembly is
translated forward of the base frame and a portion of the
back-support assembly is disposed rearwardly of the seat-support
assembly.
3. The ottoman of claim 2, wherein the movement of the seat-support
assembly between the closed position and the open position is in
substantially parallel-spaced relation to the base frame.
4. The ottoman of claim 1, wherein the slide mechanism comprises a
slot located on the base frame that slidably engages with a
pin-shaped element extending from the seat-support assembly.
5. The ottoman of claim 4, wherein the slot comprises an opening
having a rearward end and a forward end, the forward end contacting
the pin-shaped element in the open position, thereby restraining
rearward rotational movement of the back-support assembly.
6. The ottoman of claim 1, wherein a front support leg and a rear
support leg extend generally downward from the base frame
vertically supporting the base frame above an underlying
surface.
7. The ottoman of claim 6, wherein the rear support leg defines a
vertically-extending plane that is perpendicular to the underlying
surface, the back-support assembly being forwardly disposed of, and
in substantially parallel-spaced relation to, the
vertically-extending plane when in the open position.
8. The ottoman of claim 1, the ottoman comprising at least one
armrest, the at least one armrest having a rear portion that is
provided with a bracket to facilitate a pivotable coupling with the
seat-support assembly, and a mid portion that is provided with a
bracket to facilitate a pivotable coupling with the linkage
system.
9. The ottoman of claim 8, wherein the linkage system is pivotably
interconnected between the back-support assembly, the at least one
armrest, and the seat-support assembly such that rearward
rotational movement of the back-support assembly induces rearward
rotation movement of the at least one armrest in relation to the
seat-support assembly.
10. The ottoman of claim 9, wherein in the open position, the
underside of the back-support assembly forming a backrest of a
seating unit, and the seat-support assembly forming a seat of a
seating unit, the seating unit being accessible for a seated
occupant.
11. The ottoman of claim 1, wherein an upper side of the
seat-support assembly opposite to the underside is provided with an
upholstered top cushion that is configured to form a substantially
horizontal surface when in the closed position.
12. A seating unit foldable to an ottoman, the seating unit
comprising: a base frame; a seat-support assembly being slidably
engaged with the base frame; at least one armrest being pivotably
coupled to the seat-support assembly; a back-support assembly; a
linkage system comprising a plurality of pivotably interconnected
linkages; wherein the linkage system being configured to pivotably
interconnect the base frame, the seat-support assembly, and the
back-support assembly, such that forward rotational movement of the
back-support assembly induces rearward translation of the
seat-support assembly in relation to the base frame and
coincidentally induces forward rotational movement of the at least
one armrest in relation to the seat-support frame.
13. The seating unit of claim 12, wherein the back-support assembly
is moveable between an open position, in which the back-support
assembly is oriented substantially upright and rearwardly disposed
of the seat-support assembly, and a closed position, in which the
back-support assembly substantially overlies the seat-support
assembly in substantially parallel-spaced relation.
14. The seating unit of claim 12, wherein the slidable engagement
is embodied as a slide mechanism that facilitates the rearward
translation of the seat-support assembly when traversing the base
frame.
15. The seating unit of claim 12, wherein the back-support assembly
comprises a top frame having a lower perimeter defining a lower
planar surface and the seat-support assembly comprises a bottom
frame having an upper perimeter defining an upper planar surface,
the lower planar surface substantially aligning with the upper
planar surface when in the closed position.
16. The seating unit of claim 15, wherein contact between a portion
of the lower perimeter of the back-support assembly top frame and a
portion of the upper perimeter of the seat-support assembly bottom
frame restraining forward rotational movement of the back-support
assembly.
17. The seating unit of claim 15, wherein in the closed position,
an upper side of the back-support assembly opposite to the lower
planar surface forming a footrest surface of an ottoman.
18.-20. (canceled)
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] Not applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
[0002] Not applicable.
BACKGROUND OF THE INVENTION
[0003] This invention relates to an upholstered ottoman that
converts to a seating unit, such as a recliner chair or sofa, or
any other upholstery furniture designed to support a user's body in
an essentially seated position. More particularly, an improved
linkage system for concurrently controlling pivotable movement of a
back-support assembly and slidable adjustment of a seat-support
assembly is disclosed.
[0004] Ottomans are common in the furniture industry. Typically,
ottomans accompany a seating unit as a separate piece of furniture,
and more specifically, are placed forward of a traditional seating
unit. Further, ottomans are usually configured with an upper
surface that is generally planar and/or upholstered such that an
occupant seated in the seating unit may rest their feet thereon. As
used hereinabove, "seating unit" generally refers to recliners,
incliners, sofas, love seats, sectionals, theater seating,
traditional chairs, chairs with a moveable seat portion (e.g.,
motion upholstery furniture), or other such furniture pieces.
[0005] The use of ottomans as seating units is prevalent,
particularly when the ottoman is portable, which allows it to be
moved to various areas of a living space. However, an occupant
seated on an ottoman may experience discomfort as it lacks a
backrest that is provided with a traditional seating unit.
Accordingly, a separate traditional seating unit is desirable,
although inconvenient, for use along with an ottoman to properly
support a seated occupant.
[0006] The present invention pertains to an ottoman that is
convertible to a seating unit having a backrest. Significantly, the
design of a linkage system within the ottoman is adapted to control
an adjustment of armrests and a seat-support assembly concurrently
with the articulate movement of a back-support assembly. Further,
the present invention provides a wall-proximity feature such that
the assemblies mentioned above move in relation to a stationary
base frame to avoid contacting a wall that may be rearward of the
convertible ottoman.
BRIEF SUMMARY OF THE INVENTION
[0007] A brief overview of the convertible ottoman and its
components follows immediately below. A more detailed description
is provided in the Detailed Description of the Invention
section.
[0008] The present invention provides a ottoman that converts to a
seating unit (hereinafter the "seating unit"). The seating unit
broadly includes, a back-support assembly, a pair of opposed
armrests, a seat-support assembly, and a base frame. A linkage
system is further provided comprising a plurality of pivotably
generally interconnected linkages. Further, the linkage system is
configured to rotatably couple the seat-support assembly to the
back-support assembly and to translatably couple the seat-support
assembly and the base frame. Still further, the linkage assembly
couples the armrests to both the seat-support assembly and the base
frame. Typically, the seating unit is moveable into different
positions, as facilitated by the linkage system. In one embodiment,
these positions correspond with movement of the seating unit
between the following: a closed position forming an ottoman and an
open position forming a seating furniture piece. Accordingly, the
back-support assembly is moveable between a closed position, in
which the underside of the back-support assembly substantially
overlies the seat-support assembly and faces generally downwardly,
and an open position, in which the back-support assembly is
oriented substantially upright in relation to the seat-support
assembly and the underside of the back-support assembly faces
generally forwardly. In the open position, the underside of the
back-support assembly forms a backrest of a seating unit, and the
seat-support assembly forms a seat of a seating unit such that the
seating unit is accessible for a seated occupant.
[0009] In operation, a user-exerted force upward on the
back-support frames creates rearward rotational movement thereof,
which in turn, induces rearward rotational movement of the at least
one armrest in relation to the seat-support assembly.
Coincidentally, the rearward rotational movement induces the
seat-support assembly to be translated forward of the base frame
and a portion of the back-support assembly to be disposed
rearwardly of the seat-support assembly. Forward translation is
typically carried out by slide mechanisms that comprise one or more
slots located on the base frame that slidably engage with one or
more pin-shaped elements extending from the seat-support assembly.
Accordingly, translational movement of the seat-support assembly
between the closed position and the open position is in
substantially parallel-spaced relation to the base frame.
[0010] As will be seen from the detailed description that follows,
the invention provides a convertible ottoman to a seating unit that
provides a wall-proximity feature. Additional advantage, and novel
features of the invention will be set forth in part in a
description which follows and in part will become apparent to those
skilled in the art upon examination of the following, or may be
learned by practice of the invention.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING
[0011] In the accompanying drawings, which form a part of the
specification, and which are to be read in conjunction therewith,
and in which like reference numerals are used to indicate like
parts in the various views, where thicknesses and dimensions of
some components may be exaggerated for clarity:
[0012] FIG. 1 is a diagrammatic perspective view of a seating unit,
adjusted to the open position, according to an embodiment of the
present invention;
[0013] FIG. 2 is a side perspective view of the seating unit,
adjusted to the closed position, in accordance with an embodiment
of the present invention;
[0014] FIG. 3 is a view similar to FIG. 2, but with the seating
unit adjusted to the open position, in accordance with an
embodiment of the present invention;
[0015] FIG. 4 is an enlarged partial diagrammatic view featuring a
slide mechanism in the open position, in accordance with an
embodiment of the present invention;
[0016] FIG. 5 is a side perspective view of the seating unit with a
top frame and bottom frame assembled thereto, adjusted to a
transitional orientation between the open and closed positions, in
accordance with embodiments of the present invention;
[0017] FIG. 6 is a view similar to FIG. 5, but with the seating
unit adjusted to the closed position, according to an embodiment of
the present invention;
[0018] FIG. 7 is diagrammatic view of the seating unit with an
upholstered exterior, adjusted to the closed position, in
accordance with an embodiment of the present invention;
[0019] FIG. 8 is a view similar to FIG. 7, but with the seating
unit adjusted to the open position, in accordance with an
embodiment of the present invention;
[0020] FIG. 9 is a side cross-section view of the seating unit,
adjusted to the open position, according to an embodiment of the
present invention; and
[0021] FIG. 10 is an enlarged partial side cross-section view of
the slide mechanism, the seating unit adjusted to the open position
according to an embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0022] Referring to the drawings in greater detail and initially to
FIG. 1, the embodiments of the present invention are directed
toward an ottoman convertible to a seating unit (hereinafter the
"seating unit"), which is shown and designated generally by
reference numeral 100. The seating unit 100 broadly includes, a
back-support assembly 110, a pair of opposed armrests 120, a
seat-support assembly 130, a base frame 140, and a linkage system
150. Typically, the seating unit is moveable into different
positions, as facilitated by the linkage system 150, more fully
discussed below in FIG. 2. In one embodiment, these positions
correspond with movement of the seating unit between the following:
a closed position forming an ottoman; and an open position forming
a furniture piece having a seat back. A diagrammatic perspective
view of the seating unit 100 adjusted to the open position,
according to one embodiment of the present invention, is shown in
FIG. 1.
[0023] The components mentioned above will now be discussed with
more detail, with reference to FIG. 1. The back-support assembly
110 includes an upper tube assembly 112, and a pair of opposed
seatback brackets 114 that extend therefrom. The upper tube
assembly 112 is typically constructed from a generally rigid
material, such as square steel tubing or square stock, and
generally forms a rectangularly-shaped profile. In one embodiment,
the upper tube assembly 112 includes a pair of laterally-spaced
side members 116, a first crossbeam 118, and a second crossbeam
119. The pair of opposed seatback brackets 114 are typically
mounted on each of the respective laterally-spaced side members
116, and extend in a substantially perpendicular direction
therefrom. In the embodiment depicted on FIG. 1, the pair of
opposed seatback brackets 114 are mounted on a mid portion of the
pair of laterally-spaced side members 116 between the first
crossbeam 118, and the second crossbeam 119. The mounting may
comprise a welded joint, connection by suitable fasteners, or any
other method know to those of ordinary skill in the art.
[0024] Additionally, the pair of opposed seatback brackets 114 may
be formed from metal bar stock, stamped or formed steel, laser-cut
from sheet metal, or any other sturdy material, any of which would
be suitable for use with the present invention. Moreover, the
seating unit 100 illustrated and described herein comprises a
plurality of linkages and brackets, as discussed throughout. These
linkages and brackets may be formed, as discussed in conjunction
with the pair of opposed seatback brackets 114, from any suitable
material known to those of ordinary skill in the
furniture-manufacturing industry. Thus, although the attributes of
each subsequently mentioned linkage and/or bracket will not be
discussed, it should be understood that the material selections and
variety of fabrication procedures above is to be applied to
each.
[0025] The pair of opposed armrests 120 each include an arm-pivot
bracket 122 and an intermediate bracket 128. The arm-pivot bracket
122 is located on the rearward portion of each of the pair of
armrests 120 enabling rotation by pivotably coupling the armrests
120 to the seat-support assembly 130. Turning briefly to FIG. 5,
the pivotable coupling to the seat support assembly 130 is shown in
detail. As illustrated, a rearward panel 726 of a bottom frame 720
attached to the seat-support assembly 130 carries the arm-pivot
bracket 122. In one embodiment, as shown in FIG. 5, the arm-pivot
bracket includes at least an external C-shaped element 124 that
connects to a respective armrest 120, and an internal C-shaped
element 126 that connects to the seat-support assembly 130. In this
configuration, the pivotable coupling is embodied as a pin (e.g.,
clevis pin) or pair of pins that align the C-shaped elements 124,
126, and provide an axis for rotational movement of the armrests
120. Returning to FIG. 1, the intermediate bracket 128 is located
on a mid portion of each respective armrest 120 and pivotably
couples the linkage system 150 thereto. It should be appreciated
and understood that although a pair of armrests 120 is depicted and
described, persons familiar with the field of invention would
realize that the present invention is not limited to two armrests
and that one or multiple armrests may be used according to the
design of the convertible furniture piece.
[0026] The seat-support assembly 130 includes a bottom frame 132,
and a pair of opposed boomerang-shaped plates 134 that extend
upward therefrom (seen in additional detail in FIG. 2). The lower
tube assembly 132 is typically constructed from a generally rigid
material, such as square steel tubing or square stock, and
generally forms a rectangular-shaped profile. In one embodiment,
the lower tube assembly 132 includes a pair of laterally-spaced
side members 136, a first crossbeam 138, and a second crossbeam
139. The pair of opposed boomerang-shaped plates 134 are typically
mounted on each of the respective laterally-spaced side members
136, and extend in a substantially perpendicular direction
therefrom. In the embodiment depicted on FIG. 1, the pair of
opposed boomerang-shaped plates 134 are mounted on a rear portion
of the pair of laterally-spaced side members 136 just forward of
the first crossbeam 138. The mounting may comprise a welded joint,
connection by suitable fasteners, or any other method know to those
of ordinary skill in the art. In one instance, the profile of the
boomerang-shaped plates 134 includes a forward concave edge formed
with a steeply downward slope that accommodates cushions to support
a seated occupant, as discussed more fully below.
[0027] In an exemplary embodiment, the seat-support assembly 130
includes a bottom frame 720 while the back-support assembly 110
includes a top frame 710, as generally shown in FIGS. 5 and 6. Top
frame 710 includes a forward panel 714, a rearward panel 716, and a
pair of side panels 712 extending between the forward panel 714 and
the rearward panel 716. Bottom frame 720 includes a forward panel
724, the rearward panel 726, and a pair of side panels 722
extending between the forward panel 724 and the rearward panel 726.
The panels 712, 714, 716, 722, 724, and 726 are typically formed of
sturdy material. Further, bottom edges of panels 712, 714, and 716
form a bottom perimeter that defines a lower planar surface 730 of
the back-support assembly 110. Top edges of panels 722, 724, and
726 form an upper perimeter that defines an upper planar surface
740 of the seat-support assembly 730. Further consideration of
these planar surfaces 730, 740, will be given below in a discussion
regarding operation of the seating unit 100.
[0028] In embodiments, cushions, upholstery, or any other fabric
and foam combination is assembled to the exterior of the top frame
710 and bottom frame 720 of the seating unit 100. With continued
reference to FIG. 5, the back-support assembly 110 includes an
upper side 210 and an underside 220. Additionally, the seat-support
assembly includes an upper side 230 and an underside 240. The upper
side 210 may include a rigid support (not shown), such as a board
or spring frame, to provide structural integrity to a top cushion
250 (FIG. 7) disposed above the top frame 710 and between the
armrests 120. The top cushion 250 typically forms a generally
planar surface that serves as footrest or a padded, stool-type,
seating area for the user when the seating unit 100 is adjusted to
an ottoman, in the closed position. In the open position, the
underside 220 of the back-support assembly 110 forms the backrest
of the seating unit 100, and the seat-support assembly 130 forms
the seat. Typically, a backrest cushion 260 (FIG. 8) or other
upholstery is disposed along the underside 220 of the back-support
assembly 110 to provide the seated occupant a comfortable padded
back support. Also a seat cushion 270 (FIG. 8) or other upholstery
is disposed along the upper side 230 of the seat-support assembly
130 so that the seating unit 100 is comfortable to a seated
occupant. In one embodiment, a rigid support element (not shown),
such as a board or spring frame, provides structure or rigidity for
the seat cushion 270. Optionally, a raised lip 280 (FIG. 8) on the
seat cushion 270 is depicted to provide lumbar support for an
occupant's lower back.
[0029] The base frame 140 serves as an anchor to the seating unit
100, as it maintains a stable position throughout the opening and
closing operation of the various seating unit components. Referring
back to FIG. 1, base frame 140 broadly includes a pair of
substantially parallel-spaced lateral support members 146, a
forward transverse member 149, a rearward transverse member 148,
and a pair of slide mechanisms 145. Slide mechanisms 145 typically
reside on each of the lateral support members 146 and are discussed
in greater detail immediately below with reference to FIGS. 4, 9,
and 10. The lateral support members 146 and the transverse members
148, 149, are typically constructed from a generally rigid
material, such as square steel tubing or square stock, and
generally form a rectangular-shaped profile. Each of the pair of
lateral support members 146 includes a backrest bracket 142 and an
armrest bracket 144, as best depicted in FIG. 4. Backrest brackets
142 (FIG. 2) are positioned toward a central area of each lateral
support member 146 and extend upwardly therefrom. Additionally,
backrest brackets 142 (FIG. 2) serve to capture a pivot that allows
the back-support assembly 110 to angularly rotate. Armrest brackets
144 are positioned near the forward transverse member 149 at a
forward portion of each lateral support member 146 and extend
upwardly therefrom. Additionally, armrest brackets 144 serve to
capture a pivot that allows the pair of opposed armrests 120 to
rise and lower in relation to the base frame 140. Alternatively,
the brackets 144, 142, may be formed as tabs that were originally
machined as a feature of each of the lateral support members
146.
[0030] Returning to FIG. 1, the slide mechanisms 145 enable
slidable engagement of the seat-support assembly 130, near the
underside 240 (FIG. 5), and the lateral support members 146 of the
base frame 140. Slidable engagement facilitates forward and
rearward translation of the seat-support assembly 130, i.e.,
traversing the base frame 140, when opening and closing the seating
unit 100.
[0031] Referring now to FIG. 4, each of the slide mechanisms 145
include one or more slots 410, one or more bushings 420, and one or
more pin-shaped elements 430 extending generally downward from the
seat-support assembly 130. Slots 410 include an opening having a
front end 450 (FIG. 10), and a back end 460, where the ends 450,
460 may be rounded to receive a pin-shaped element. As more fully
discussed below, the front end 450 assists is resisting adjustment
of the seating unit 100 beyond the open position. Also, slots 410
may be formed into the lateral support members 146, or into a
separate plate 440 that is mated onto the lateral support members
146. Bushings 420 are attached on the underside 240 (FIG. 5) of the
seat-support assembly 130, and more particularly, to the bottom
frame 132. Bushings 420 function as spacers to reduce friction
during slidable engagement, and may be polished or oiled to
facilitate effortless translation of the seat-support assembly 130
over the base frame 140. Typically, the pin-shaped element 430 is
mounted generally downward from the bottom frame 132 and axially
aligned with a central bore of the each respective bushing 420.
Pin-shaped element 430 is sized and shaped to fit within the
opening of each respective slot 410 but not interfere with other
linkages or contact the underlying surface. Further, the pin-shaped
element 430 may be formed of steel rod, rolled metal, or any other
rigid material known or used by those with ordinary skill in the
field of furniture manufacturing. In an exemplary embodiment, the
slot 410, the bushing 420, and the pin-shaped element 430 are
provided and assembled in a one-to-one ratio. Although two of these
assemblies are illustrated per slide mechanism 145, one of ordinary
skill will appreciate that one or multiple assemblies may be
provided on the seating unit 100.
[0032] With reference to FIG. 1, in one embodiment of the base
frame 140, the rearward transverse member 148 and forward
transverse member 149 extend laterally beyond the lateral support
members 146 and serve as rigid connections to rear legs 172 and
front legs 170. It should be understood that the designation of
reference numerals 170 and 172 as "legs" is not meant to be
limiting, wherein the legs 170, 172, may be blocks, risers, a
frame, or any other element(s) that vertically support the base
frame 140 above an underlying surface (not shown). Further, legs
170, 172, may be formed of a solid metal rod, square bar, shaped
wood, or any other suitable material known to those of ordinary
skill in the furniture-manufacturing industry. Optionally, a lower
portion of the legs, 170, 172, may include castors that allow the
seating unit 100 to travel over, roll along, the underlying
surface. Although, a pair of front legs 170, and a pair of rear
legs 172 is described and illustrated in FIG. 1, any number of
legs, including no legs, is contemplated by the present
invention.
[0033] Turning now to FIG. 2, the linkage system 150 will now be
discussed in detail. Initially, linkage system 150 comprises a
plurality of linkages that are arranged to articulately actuate and
control movement of the seating unit during convertible movement
between the open and closed positions. These linkages may be
pivotably interconnected. It is understood and appreciated that the
pivotable couplings (illustrated as pivot points in the figures)
between these linkages can take a variety of configurations, such
as pivot pins, bearings, traditional mounting hardware, rivets,
bolt and nut combinations, or any other suitable fasteners which
are well-known in the furniture-manufacturing industry. Further,
the shapes of the linkages and the brackets may vary as desired, as
may the locations of certain pivot points. It will be understood
that when a linkage is referred to as being pivotably "coupled" to,
"interconnected" with, "attached" on, etc., another element (e.g.,
linkage, bracket, frame, and the like), it is contemplated that the
linkage and elements may be in direct contact with each other, or
other elements (such as intervening elements) may also be
present.
[0034] The linkage system 150 guides the rotational movement of the
back-support assembly 110 and the translational movement of the
seat-support assembly 130, in relation to the base frame 140. In an
exemplary configuration, these movements are controlled by a pair
of mirror-image linkage systems (one of which is shown herein),
which comprise pivotably interconnected linkages. The linkage
systems are mirror-images of each other about a
longitudinally-extending plane that bisects the seating unit 100
between the pair of opposed armrests 120. As such, the ensuing
discussion will focus on only one of the linkage systems, with the
content being equally applied to the other linkage assembly.
[0035] With particular reference to FIGS. 2 and 3, the linkage
system 150, includes at least a swing linkage 302, a fulcrum
linkage 304, a drive linkage 306, and a raise linkage 308. Swing
linkage 302 is pivotably coupled on a first end to the back-support
assembly 110 at pivot point 312 on a rearward portion of the
seatback bracket 114. Swing linkage 302 is also pivotably coupled
on a second end to the seat-support assembly 130 at an upper end of
boomerang-shaped plate 134 at pivot point 310. Fulcrum linkage 304
is pivotably coupled at pivot point 316 on an upper end to the
back-support assembly 110 on a forward portion of the seatback
bracket 114. Fulcrum linkage 304 is also pivotably coupled at pivot
point 314 on a lower end to the seat-support assembly 130 at a
generally central area of the boomerang-shaped plate 134.
Optionally, a pin 320 may be located on the fulcrum linkage 304 to
interfere with the swing linkage 302 thereby resisting rearward
rotation of the back-support assembly 110. Drive linkage 306 is
pivotably coupled on a rearward end to a mid portion of the fulcrum
linkage 304 at pivot point 318. Drive linkage 306 is also pivotably
coupled at pivot point 322 on a forward end to a mid portion of the
base frame 140 at the backrest bracket 142. Raise linkage 308 is
pivotably coupled on an upper end of the armrest 120 at the
intermediate bracket 128 at pivot point 324. Raise linkage 308 is
also pivotably coupled at pivot point 326 on a lower end to a
forward portion of the base frame 140 at the armrest bracket
144.
[0036] Next, the convertible operation of the seating unit will be
discussed with continued reference to FIGS. 2 and 3. Initially, the
closed position, shown in FIG. 2, will be described. In the closed
position, the underside 220 (FIG. 5) of the back-support assembly
110 substantially overlies the seat-support assembly 130 and faces
generally downwardly. Additionally, the pivotable coupling of the
rearward end the drive linkage 306 is situated rearward of the
pivotable coupling of the upper end of the fulcrum linkage 304 such
that a downward force created by a seated occupant resists
adjustment of the seating unit 100 from the closed position. In the
open position, as shown in FIG. 3, the back-support assembly 110 is
oriented substantially upright in relation to the seat-support
assembly 130 and the underside 220 (FIG. 5) of the back-support
assembly 110 faces generally forwardly. Also, the back-support
assembly 110 is rearwardly disposed of the seat-support assembly
130. Additionally, the pivotable coupling of the rearward end of
the drive linkage 306 is situated forward of the pivotable coupling
the upper end of the fulcrum linkage 304 such that a rearward force
created by the seated occupant resists adjustment of the seating
unit 100 from the open position.
[0037] To commence adjustment from the closed position to the open
position a user may exert an upward force on a manual-access
portion 290 (FIG. 7) of the back-support assembly 110. This force
generates several coincidental movements within the linkage system
150. Generally, the upward force causes rearward rotational
movement of the back-support assembly 110, rearward rotational
movement of the armrests 120, and forward translational movement of
the seat-support assembly 130 such that a forward portion overhangs
the base frame 140.
[0038] More specifically, rearward rotational movement of the
back-support assembly 110 describes a generally circuitous path
that is guided by its pivotable coupling to the swing link 302 and
the fulcrum link 304. These links 302, 304, rotate rearward with
back-support assembly 110 governing its angular inclination and
rotational position with respect to the seat-support assembly 130.
Rearward rotation of the fulcrum link 304 is about pivot point 318
that pivotably couples the fulcrum link 304 to the rearward end of
drive link 306. The forward end of the drive link 306 is pivotably
coupled to the base frame 140 thereby limiting the lateral movement
of the drive link 306. Accordingly, rearward rotation of the
fulcrum link 304 creates a counterclockwise torque about pivot
point 318 that is transferred to the boomerang-shaped plate 134,
attached to the seat-support assembly 130, in a forward lateral
direction. This forward-lateral force, that is aligned with the
openings of the slots 410, triggers the forward translational
movement of the seat support assembly 130. In one embodiment, the
forward translational movement of the seat-support assembly 130 is
in substantially parallel-spaced relation to the base frame 140.
The forward translational movement of the seat-support assembly 130
forces the armrests 120 forward at the arm-pivot bracket 122. This
forward motion causes clockwise angular rotation of the raise link
308 about the pivot point 326 that is fixedly connected to the base
frame 140. Accordingly, the clockwise angular rotation of the raise
link 308 drives the armrest upward at the intermediate bracket 128
such that the armrests are exposed from the seat-support assembly
130.
[0039] In an exemplary embodiment, rearward rotational movement of
the back-support assembly 110 meets resistance upon the pin 320
contacting the swing linkage 302, the pin-shaped element 430
contacting the front end 450 (FIG. 10) of the slot 410 opening, or
both. This resistance may occur when the back-support assembly 110
is at any degree of inclination. Preferably, the degree of
inclination at the open position is substantially ninety degrees,
i.e., perpendicular to the seat-support assembly 130. In this
instance, the back-support assembly 110 is prevented from
contacting a surrounding wall, being referred to herein as the
wall-proximity feature. In particular, with reference to FIG. 3, a
vertically-extending plane 300, being defined by the one or more
rear legs 172 and being perpendicular to the underlying surface,
represents a nearest possible wall. The wall-proximity feature is
configured such that the back-support assembly 110 rests in a
position forwardly disposed of, and in substantially
parallel-spaced relation to, the vertically-extending plane when in
the open position. Although two different configurations of a
mechanism to resist rearward rotational movement are discussed, it
should be appreciated and understood by those of ordinary skill in
the art that other such mechanisms could be used, and the invention
is not limited to those discussed herein.
[0040] Turning to FIG. 2, to commence adjustment from the open
position to the closed position a user may exert a
forwardly-directed force on the back-support assembly 110 (in the
position shown in FIGS. 1 and 3). This force generates several
coincidental movements within the linkage system 150. Generally,
the forwardly-directed force causes forward rotational movement of
the back-support assembly 110, forward rotational movement of the
armrests 120, and rearward translational movement of the
seat-support assembly 130 such that the underside 220 (FIG. 5)
increasingly overlies the base frame 140.
[0041] More specifically, forward rotational movement of the
back-support assembly 110 cause the links 302, 304, to rotate
forward about the pivotable coupling with the drive link 306.
Accordingly, forward rotation of the fulcrum link 304 creates a
clockwise torque that is transferred to the seat-support assembly
130, in a rearward lateral direction. This rearward-lateral force,
coincidentally rearwardly translates the seat support assembly 130.
The rearward translational movement of the seat-support assembly
130 forces the armrests 120 rearward at the arm-pivot bracket 122
and causes counterclockwise angular rotation of the raise link 308.
Accordingly, the counterclockwise angular rotation of the raise
link 308 drives the armrest downward into a cavity within the
seat-support assembly 130.
[0042] Although this transformation procedure is described with
reference to manual operation, the present invention contemplates
automated assistance (e.g., motor, electric engine, or the like) to
create the convertible motion between the open and closed
positions.
[0043] It should be understood that the construction of the linkage
system 150 lends itself to enable the back-support assembly 110 to
be easily assembled and disassembled from the remaining components
of the seating unit 100. Specifically the nature of the pivot
points 312, 316, on the seatback bracket 114, or any other pivot
and/or mounting location, allows for use of quick-disconnect
hardware, such as a knock-down fastener. Accordingly, rapid
disconnection of components prior to shipping, or rapid connection
in receipt, is facilitated.
[0044] The present invention has been described in relation to
particular embodiments, which are intended in all respects to be
illustrative rather than restrictive. Alternative embodiments will
become apparent to those skilled in the art to which the present
invention pertains without departing from its scope.
[0045] It will be seen from the foregoing that this invention is
one well adapted to attain the ends and objects set forth above,
and to attain other advantages, which are obvious and inherent in
the device. It will be understood that certain features and
subcombinations are of utility and may be employed without
reference to other features and subcombinations. This is
contemplated by and within the scope of the claims. It will be
appreciated by persons skilled in the art that the present
invention is not limited to what has been particularly shown and
described hereinabove. Rather, all matter herein set forth or shown
in the accompanying drawings is to be interpreted as illustrative
and not limiting.
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