U.S. patent number 3,854,246 [Application Number 05/352,263] was granted by the patent office on 1974-12-17 for threshold weatherstrip.
This patent grant is currently assigned to Combustion Engineering Inc.. Invention is credited to Owen E. McAllister.
United States Patent |
3,854,246 |
McAllister |
December 17, 1974 |
THRESHOLD WEATHERSTRIP
Abstract
A threshold weatherstrip for an inswinging door which is
characterized by a channel member of reinforced plastic material
having a U-shaped cross section with the flanges thereof adapted to
engage opposite faces of the door bottom and a resilient
compressible means seated in the upwardly opening channel with
screws or similar fasteners for adjustably attaching the assembly
on the bottom edge of the door, the compressible means, in one form
thereof, being a foam plastic strip which is compressed and fills
the space between the top face of the channel web and the bottom
edge of the door, and a sweep-forming strip member depending from
the bottom face of the channel member for sweeping engagement wite
the sill surface. In an alternative arrangement the compressible
means takes the form of spaced coil spring members disposed between
foam plastic blocks, the latter closing the openings at the ends of
the channel member.
Inventors: |
McAllister; Owen E. (Oshkosh,
WI) |
Assignee: |
Combustion Engineering Inc.
(Windsor, CT)
|
Family
ID: |
26875829 |
Appl.
No.: |
05/352,263 |
Filed: |
April 18, 1973 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
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179935 |
Sep 13, 1971 |
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Current U.S.
Class: |
49/470; 49/482.1;
49/475.1 |
Current CPC
Class: |
E06B
7/2314 (20130101); E06B 7/2316 (20130101) |
Current International
Class: |
E06B
7/23 (20060101); E06B 7/22 (20060101); E06b
001/70 (); E06b 007/22 () |
Field of
Search: |
;49/470,475,480,482,488,490,494,493,495,498,468 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Kannan; Philip C.
Assistant Examiner: Kannan; Philip C.
Attorney, Agent or Firm: Greenawalt; Guy A.
Parent Case Text
This application is a continuation-in-part of my application Ser.
No. 179,935, filed Sept. 13, 1971, now abandoned.
Claims
I claim:
1. Weather sealing means for the bottom of a door comprising a
channel member of reinforced plastic material of generally U-shaped
cross section which is of sufficient length to enable it to be
mounted so as to extend along the entire bottom edge of the door
with upstanding side flanges which are flared inwardly at the top
edges so as to snugly engage the bottom margins of the exterior and
interior door faces, an elongate strip member of resilient,
compressible material disposed in said channel member between the
bottom edge of the door and the bottom of the channel member which
has a width less than the distance between said side flanges,
adjustable fastening means for securing the channel member in
adjusted position on the bottom edge of the door with said strip
member adapted to be compressed in the space between the bottom
edge of the door and the bottom of the channel member so as to
substantially fill said space while permitting limited adjustment
of said channel member on the door edge, and resilient,
compressible strip means extending in depending relation along the
bottom face of said channel member and between the side edges of
the door so as to contact in wiping engagement with the sill
surface which confronts the bottom face of said channel member when
the door is moved to a closed position thereby to form a weather
seal.
2. Weather sealing means for the bottom of a door comprising a
channel member of relatively rigid plastic material having a
generally U-shaped cross section and a length sufficient to extend
between the side edges of the door, which channel member is adapted
to be mounted on the bottom of the door with upstanding side
flanges which are adapted to engage the margins of the oppositely
disposed door faces, an elongate strip member of resilient,
compressible material positioned in said channel member, which
compressible strip member is of a normal width less than the
corresponding dimension of the channel member and is compressible
so as to expand laterally and fill the space between the bottom
edge of the door and the channel member, adjustable fastening means
for securing the channel member in position on the bottom edge of
the door with said resilient strip member adapted to be compressed
thereby permitting limited adjustment of the vertical position of
said channel member on said door edge, and resilient, compressible
depending strip means extending along the bottom face of said
channel member so as to contact in wiping engagement with the sill
surface which is disposed opposite the bottom edge of the door when
the door is moved to a closed position thereby to form a
weatherseal between the bottom edge of the door and the sill
surface.
3. Weather sealing means for the bottom of a door comprising a
channel member of relatively rigid plastic material having a
generally U-shaped cross section and a length sufficient to extend
between the side edges of the door, which channel member is adapted
to be mounted on the bottom of the door, said channel member having
upstanding side flanges which are spaced so as to engage the bottom
margins of the oppositely disposed door faces when positioned on
the door, an elongate strip member of resilient, compressible
material positioned in said channel member, adjustable fastening
means for securing the channel member in position on the bottom
edge of the door with said resilient strip member interposed
between the bottom edge face of the door and the inner face of the
bottom of the channel member and adapted to be compressed so as to
fill the space between the bottom edge of the door and the bottom
of the channel member thereby permitting limited adjustment of the
vertical position of said channel member on said door edge, and
resilient, compressible depending strip means extending along the
outer bottom face of said channel member so as to contact in wiping
engagement with the sill surface which is disposed opposite the
bottom edge of the door when the door is moved to a closed position
thereby to form a weatherseal between the bottom edge of the door
and the sill surface.
4. Sealing means for the bottom of a door as set forth in claim 3
wherein the compressible strip means extending along the bottom
face of the channel member is in the form of a pair of tube members
of flexible material and rectangular cross section which are filled
with a foam plastic material and which are spaced to provide a
fastener receiving area between the same and which have side walls
forming an integral continuation of the side flanges of said
channel member.
5. Sealing means for the bottom of a door as set forth in claim 3
wherein said compressible strip means extending along the bottom
face of the channel member has a side wall portion forming an
integral downward extension of a side flange of said channel member
and wherein said side wall portion has a flexible sweep forming
bottom marginal portion which extends a short distance below the
bottom face of said compressible strip means.
6. Sealing means for the bottom of a door as set forth in claim 3
wherein said channel member is of a length corresponding to the
dimension of the door at the bottom and between the side edges and
said compressible strip members extend a short distance beyond the
ends of said channel member.
7. Sealing means for the bottom of a door as set forth in claim 3
wherein said compressible strip means extending along the
bottommost face of the channel member has a side wall portion which
is in the form of an integral downward extension of a side flange
of said channel member and a flexible sweep forming bottom marginal
portion which extends at least to the bottom edge of the remaining
portions of said compressible strip means.
8. Sealing means for the bottom of a door as set forth in claim 3
wherein the compressible strip member which is disposed in said
channel member is a medium density closed cell foam plastic
material.
9. Sealing means for the bottom of a door as set forth in claim 3
wherein the compressible strip means extending along the bottom
face of the channel member is in the form of a tubular member
filled with a medium density plastic foam.
10. Sealing means for the bottom of a door as set forth in claim 9
wherein said compressible strip means has exterior faces which form
a continuation of the side flanges of said channel member.
11. Sealing means for the bottom of a door as set forth in claim 3
wherein said depending strip means extending along the bottom face
of said channel member comprises a plurality of narrow strip
members of flexible material which are spaced across the width of
the bottom edge of the door and extend along the same in generally
parallel depending relation from the bottom face of said channel
member.
12. Sealing means for the bottom of a door as set forth in claim 11
wherein one of the outside strip members constitutes an integral
extension of the associated side flange and extends a short
distance below the bottommost edges of the remaining strip
members.
13. Weather sealing means for the bottom of a door comprising a
channel member of reinforced plastic material of generally U-shaped
cross section which is of sufficient length to extend along the
entire bottom edge of the door, said channel member having
upstanding side flanges which are turned inwardly so as to snugly
engage the bottom margins of the exterior and interior door faces
when mounted on the bottom of the door, a resilient, compressible
means seated in said channel member so as to be disposed, when the
channel member is mounted on the door, between the bottom edge face
of the door and the inside bottom face of the channel member,
fastening means for securing the channel member in adjusted
position on the bottom edge of the door with said resilient and
compressible means adapted to be compressed in the space between
the bottom edge of the door and the bottom of the channel member so
as to fill the space whereby said space is closed while limited
adjustment of said channel member on the door edge is permitted,
and resilient, compressible strip means extending in depending
relation along the bottom face of said channel member and between
the side edges of the door so as to contact in wiping engagement
the sill surface which confronts the bottom face of said channel
member when the door is moved to a closed position thereby to
effect a weather seal.
14. Sealing means for the bottom of a door as set forth in claim 13
wherein said resilient and compressible means, which is seated in
said channel member, comprises coil spring members which are spaced
along said channel member and which are adapted to be compressed by
said fastening means and to urge said channel member toward the top
face of the door sill structure.
15. Sealing means for the bottom of a door as set forth in claim 13
wherein said resilient and compressible means which is seated in
said channel member comprises relatively short sections of foam
plastic strip material which are seated in the ends of the channel
member so as to close the space between the bottom edge of the door
and the bottom of the channel member at the ends of the channel
member.
16. Sealing means for the bottom of a door as set forth in claim 13
wherein said resilient and compressible means which is seated in
said channel member comprises spaced coil springs disposed between
the ends of said channel member and compressible blocks of a foam
plastic material of relatively short length at the ends of the
space which will seal off the ends of the space between the bottom
edge of the door and the bottom of the channel member.
17. Weather sealing means for the bottom of a door as set forth in
claim 13 wherein said means for securing the channel member in
adjusted position on the bottom edge of the door comprises screw
members with the heads thereof seated in downwardly opening,
upwardly extending recesses in the compressible strip means which
is disposed in depending relation and extends the length of the
bottom face of said channel member.
18. Weather sealing means for the bottom of a door as set forth in
claim 13 wherein the compressible strip means which depends along
the bottom face of the channel member includes a plurality of
narrow, flexible strip members which extend along the length of the
bottom edge of the door and which are spaced transversely of the
same.
19. Weather sealing means for the bottom of a door as set forth in
claim 18 wherein an outside strip member is in the form of an
integral extension of the associated side flange of said channel
member and extends a short distance below the bottommost edges of
the remaining strip members.
Description
This invention relates to weatherstripping and is more particularly
concerned with improvements in a threshold weatherstrip for
mounting on the bottom of a door so as to afford a weather seal
between the bottom edge of the door and the upward face of the
sill.
Various weatherstripping arrangements have been devised for sealing
along the bottom of an exterior door so as to prevent the passage
of dirt, air and other undesirable substances into the building and
in some constructions to prevent the loss of heated or cooled air
to the outside when the door is closed. One common form of such
device comprises a metal strip seated in a recess in the bottom
edge of a door and having a flange which interlocks with a
co-operating flange on a second metal strip which is fastened to
the top face of the sill. In another common form of door bottom
seal a collapsible rubber tube is mounted in a metal strip which is
secured on the bottom edge of the door. These and other door
sealing arrangements lack adjustability and are only partly
effective in preventing the passage of air and other material which
it is desired to block. It is a general object, therefore, of the
present invention to provide a threshold weatherstrip arrangement
which is adjustable and which is more effective in preventing the
passage of undesirable materials through the doorway.
A more specific object of the invention is to provide a door bottom
weatherstrip structure which may be adjustably mounted on the
bottom edge of the door and which provides an effective seal
between the door bottom and the sill across the entire width of the
opening.
It is another object of the invention to provide a weatherstrip
structure for the bottom of an exterior door which is in the form
of a channel constructed to encompass the bottom margins of the
exterior and interior faces of the door with a compressible filler
and sealing means interposed between the channel and the bottom
edge of the door and having a depending flexible sweep for engaging
the top surface of the sill in sealing relation.
It is still another object of the invention to provide a threshold
weatherstrip structure which comprises a channel-shaped base member
adapted to be positioned on the bottom edge of the door and
enclosing a strip of foam plastic material which is compressible by
taking up on adjustable fasteners securing the assembly to the door
bottom, together with a strip of material depending from the bottom
face of the channel which is compressible and resilient to a degree
sufficient to enable it to sweep across the top surface of the sill
and provide a seal when the door is closed.
A further object of the invention is to provide a threshold
weatherstrip assembly which comprises a channel shaped base member
for fastening, by means of screws or the like, in adjustable
relation on the bottom edge of a door, with a resilient and
compressible means seated in the channel which is effective for
sealing the space between the bottom of the channel and the bottom
edge of the door while permitting adjustment, together with a
compressible and resilient sweep depending from the bottom face of
the channel for co-operation with the top face of the sill so as to
provide a seal when the door is closed.
A still further object of the invention is to provide a threshold
weatherstrip wherein a channel shaped base member is provided for
adjustably mounting by means of screws or similar fastening
elements on the bottom of the door with compressible spring members
in the space between the bottom edge of the door and the bottom of
the channel member and compressible end sealing means together with
a resilient sweep forming member depending from the channel member
for co-operation with the top face of the sill in forming a seal
upon the door being closed.
These and other objects and advantages of the invention will be
apparent from a consideration of the several forms of the threshold
weatherstrip which are illustrated in the accompanying drawings
wherein:
FIG. 1 is an elevational view showing an inswinging, hingedly
mounted, door structure installed in an exterior opening on the
bottom of which there is mounted a threshold weatherstrip which
embodies the principles of the invention;
FIG. 2 is a cross section, to an enlarged scale, taken on the line
2--2 of FIG. 1;
FIG. 3 is a perspective view, with portions broken away showing one
form of the threashold weatherstrip structure;
FIG. 4 is a cross section taken on the line 4--4 of FIG. 3, to an
enlarged scale;
FIG. 5 is a fragmentary perspective view showing a bottom corner of
a door with the weatherstrip structure of FIG. 3 secured
thereon;
FIG. 6 is a cross sectional view similar to FIG. 4 showing a
modified form of the weatherstrip structure;
FIG. 7 is a perspective view, with portions broken away, showing
another form of the weatherstrip structure;
FIG. 8 is a partial plan view of the structure shown in FIG. 7, a
portion of the door jamb being shown in section;
FIG. 9 is an end elevation of the structure shown in FIG. 7;
and
FIG. 10 is a view similar to FIG. 9 but showing the weatherstrip
structure of FIG. 7 mounted on the bottom of the door.
Referring first to FIG. 1, there is illustrated an inswinging door
structure 10 which is mounted by means of hinges 11 on a vertical
jamb member of a mounting frame 12 so as to swing inwardly to close
an exterior opening defined by the frame 12 and a bottom sill
structure 14 (FIG. 2). The door 10 is provided on its bottom edge
with a threshold weatherstrip structure 15 which embodies the
principal features of the invention and which is designed to
provide a seal between the bottom of the door 10 and the top
surface 16 of the sill structure 14 and thereby prevent the passage
of dirt, air or the like, when the threshold structure 15 is
properly installed and adjusted and the door is closed.
The threshold weatherstrip structure 15 (FIGS. 2 to 5) comprises an
elongate strip member 18 of relatively stiff or rigid material and
having a channelshaped cross section. Preferably, the channel
member 18 is made of a continuous plastic material, for example, 40
mil. P.V.C. with a metal strip imbedment 20 in the bottom forming
web portion 21 and upstanding side flange portions 22 and 23 which
have their bottom edges connected by the web 21 and which are bowed
slightly towards each other and the web 21 so as to snugly engage
the outer and inner faces 24 and 25 at the bottom of the door 10
when installed thereon as shown in FIG. 2. The metal reinforcing
strip or imbedment 20 is preferably aluminum. A strip of medium
density closed cell foam plastic 26 is seated on the top face of
the web section 21. The foam strip 26 is of substantial thickness
with a width somewhat less than the width of the channel. The side
flanges or side walls 22 and 23 of the channel member are extended
below the web section 21 and merge into side wall or outside face
portions 27, 28 of compressible bottom strips 30, 31 which are in
the form of tubular members of generally rectangular cross section
filled with a medium density plastic foam. The curtain forming
"filled foam" or foam filled tubular strips 30 and 31 have their
top sides or faces secured to the bottom face of the web section 21
leaving an open center channel space 32 for accommodating fastener
members 33. The fastener members 33, as illustrated, are in the
form of sheet metal screws spaced at a plurality of points along
the length of the channel member 18. The one side wall portion 27
on the outer side is extended somewhat below the bottom face of the
bottom tube strip 30, as indicated at 34, and has a sufficient
degree of flexibility to enable it to sweep across the portion of
the top face 16 of the sill 14 which, as shown, generally slants or
drops away toward the outside.
The compressible insert 26 and the bottom strip members 30 and 31
are extended a short distance at the ends of the assembly as shown
in FIG. 5 so as to insure sealing at this point where the bottom
edge of the door may be tapered inwardly slightly as indicated at
35.
In installing the assembly 15 on the bottom edge of the door the
fastening screws 33 may be taken up so as to compress the strip 26
allowing the assembly to be adjusted to the proper height or
position where it will provide the best contact with the top face
16 of the sill 14 as illustrated in FIG. 2. The compressible strip
26 fills at least in part the space which would otherwise be empty
and forms an effective seal extending between the bottom edge of
the door and the upwardly facing portion of the assembly 15.
There is illustrated in FIG. 6 a modified form 40 of the
weatherseal assembly. In this form of the device a series of
laterally spaced, strip members 41 depend in the form of spaced
fingers on the bottom web 42 of a channel member 43. The web 42 may
have a reinforcing metal strip 44 incorporated therein and the
finger forming flexible strip members 41 are made to depend from
the bottom face of the web section 42 a sufficient distance to
sweep across the top face 16 of the sill 14, with the front and
rear strips 45 and 46 forming continuations or bottom extensions of
the flange members 47 and 48. The front or outside strip finger 45
has a vertical dimension which is greater than the remainder of the
finger forming strips 41 and 46 in the same fashion as 27 and 34 in
the form of the assembly shown in FIGS. 2 to 5. A compressible foam
strip 50 and spaced fasteners 51 complete the assembly 40 and
correspond to the foam strip 26 and fasteners 33 of the assembly
shown in FIGS. 2 and 4, the materials employed and the application
of the assembly 40 to the door bottom being the same as described
with respect to the assembly 15.
In FIGS. 7 to 10, there is illustrated a further modified form of
threshold weatherstrip structure 60, which embodies the principal
features of the invention, and which is adapted to be mounted on
the bottom of an inswinging door structure 62 so as to provide a
seal between the bottom of the door 62 and the top surface 63 of
the sill structure 64 in the same manner as the form of the device
shown in FIGS. 1 to 6.
The illustrated weatherstrip structure 60 comprises an elongate
strip member 68 of relatively stiff or rigid material and having a
channel-shaped cross section. The channel member 68 is made of a
continuous plastic material, such as, 40 mil. P.V.C. with a metal
strip imbedment 70, preferably aluminum, in the bottom forming web
portion 71 and upstanding side flange portions 72 and 73 which have
their bottom edges connected by the web 71 and which are bowed
slightly towards each other and the web 71 so as to snugly engage
the outer and inner faces 74 and 75 at the bottom of the door 62
when installed thereon as shown in FIG. 10. A number of coil spring
members 76 are seated in spaced relation in the channel member 68,
each of which is of generally pyramid shape in relaxed condition,
as shown in FIG. 9. In the relaxed or non-compressed condition the
spiral springs extend somewhat above the top edges of the channel
side walls 72 and 73. Each of the coil springs 76 has an associated
fastener member 77 which in the form shown is a hex headed wood
screw so that raising and lowering of the weatherstrip assembly on
the door can be accomplished, by using a small ratchet wrench,
without removing the door from the hinges. A rectangular block of
medium density closed cell foam plastic 78 is seated on the top
face of the web section 71 at each end of the channel member 68
which is of substantial thickness or height when seated in the
channel member, as shown in FIGS. 7 and 9, with a lengthwise
dimension somewhat less than the inside cross dimension of the
channel member and having substantial width. These members serve to
close the ends of the channel when the assembly is installed on the
door and adjusted to the proper height or position where it will
provide the best contact with the top face 63 of the sill 64 as
illustrated in FIG. 10.
In this form of the device, as illustrated, a series of laterally
spaced, depending strip members 80 depend in the form of spaced
fingers or flaps on the bottom web 71 of the channel member 68. The
finger forming flexible strip members 80 are made to depend from
the bottom face of the web section 71 a sufficient distance to
sweep across the top face 63 of the sill 64, with the front and
rear strip members 81 and 82 forming continuations or bottom
extensions of the flange members 72 and 73. The front or outside
strip finger 81 has a vertical dimension which is greater than the
remainder of the finger forming strips 80 and 82 in the same
fashion as 45 and 46 in the form of the assembly shown in FIG. 6.
The spacing of the finger forming strip members 80 is arranged so
as to provide a center recess 83 of a size sufficient to
accommodate the heads 84 of the fastening screws 77.
The compressible spring members 76 together with the fasteners 77
and the compressible foam block or pad members 78 serve the same
purposes as the foam strip 26 and fasteners 33 of the assembly
shown in FIGS. 2 and 4, and the application of the assembly 60 to
the door bottom is the same as described with respect to the
assembly 15. This form of the device, when installed and properly
adjusted, serves to provide an efficient continuous seal between
the end of the door and the sill as shown in FIG. 10 as well as
between the end of the door and the rabbeted door frame 85 (FIG. 8)
in which the door is supported by means of hinges 86 and which may
be of conventional construction with the usual spring sealing
strips 87.
* * * * *