Patent US5035467A successfully refreshed from Google Patents.
US5035467A
Expired / Lapsed
US
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Seating system
Assignee: Invacare Corp
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Filing: 1988-09-15
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Granted: 1991-07-30
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Expires: 2008-09-15
Abstract
Abstract A seating system includes seat and back internal support frames disposed within respective foam-filled seat and back cushions which each have an outer fabric cover. The back assembly is provided with a pair of quick-release clip locks, while the seat assembly includes a plurality of support hooks in combination with mounting brackets and locking mechanisms to facilitate quick mounting and removal of the seat from a support frame such as a wheelchair base. The seat and back assemblies are coupled together in a pivoting manner by means of a handle assembly which allows the seat to be compactly folded and easily carried when removed from a support base. The back inner support frame includes upper and lower support subassemblies pivotally coupled by means of a hinge joint which allows for extension of the lumbar region when the upper support subassembly is moved rearwardly to a reclined position. The seat and back support surfaces are contoured for user comfort and support while a lower, aft portion of the back cushion is provided with a plurality of corrugations to facilitate its flexure. The internal support frame includes telescoping members to allow the internal frame to fit a range of user sizes while the hinge joint in the lower portion of the back assembly may: (1) be locked in a fixed orientation; (2) incorporate forward and aft stops to limit pivoting displacement of the upper back; or (3) have a selected neutral position to which the upper back is biased.
Inventors
- 👤 Peter Axelson
- 👤 Michael Heinrich
- 👤 Ann Lasko-Harvill
- 👤 Michael W. Silverman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:15
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/10; A61G5/12; A61G5/1043; A61G5/1054; A61G5/1056; A61G5/1067; A61G5/1091; A61G5/121; Y; Y10; Y10S; Y10S297/00; Y10S297/04
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
157 words
A seating system adapted for secure mounting to and easy removal from a support base, said seating system comprising: a seat assembly having a first internal support frame disposed within a seat cushion, said seat assembly further including first mounting means coupled to said first internal support frame and extending out of said seat cushion for securely coupling said seat assembly to the support base; a back assembly having a second internal support frame disposed within a back cushion, said base assembly further including second mounting means coupled to said second internal support frame and extending out of said back cushion for securely coupling said back assembly to the support base; and coupling means for pivotally coupling said seat and back assemblies for allowing the seating system to assume a compact, folded configuration when removed from the support base, said coupling means including handle means to permit secure gripping of the seating system and facilitate its transport.
Claim 2
Dependent Claim
157 words
A seating system adapted for secure mounting to and easy removal from a support base, said seating system comprising: a seat assembly having a first internal support frame disposed within a seat cushion, said seat assembly further including first mounting means coupled to said first internal support frame and extending out of said seat cushion for securely coupling said seat assembly to the support base; a back assembly having a second internal support frame disposed within a back cushion, said base assembly further including second mounting means coupled to said second internal support frame and extending out of said back cushion for securely coupling said back assembly to the support base; and coupling means for pivotally coupling said seat and back assemblies for allowing the seating system to assume a compact, folded configuration when removed from the support base, said coupling means including handle means to permit secure gripping of the seating system and facilitate its transport.
Claim 3
Dependent Claim
43 words
The seating system of claim 1 wherein said back assembly includes upper and lower back support frames pivotally coupled together to allow for flexure of a lower portion of said back assembly and lower back extension of a user of said seating system.
Claim 4
Dependent Claim
42 words
The seating system of claim 2 wherein said lower back support frame includes a plurality of telescoping members for allowing the length of a lower back portion of the seating system to be adjusted in accordance with the size of a user.
Claim 5
Dependent Claim
37 words
The seating system of claim 1 wherein said first internal support frame includes a plurality of telescoping members for allowing the length of said seat assembly to be adjusted in accordance with the size of a user.
Claim 6
Dependent Claim
33 words
The seating system of claim 1 wherein said second internal support frame includes a deformable cross member adapted for shaping in accordance with the contour of a back support surface of a user.
Claim 7
Dependent Claim
46 words
The seating system of claim 1 wherein said coupling means includes at least one pivot pin coupling said first and second internal support frames and defining a pivot axis about which said seat and back assemblies pivot when said seat system assumes the compacted, folded configuration.
Claim 8
Dependent Claim
50 words
The seating system of claim 2 wherein said back assembly further includes hinge means disposed within said back cushion for pivotally coupling said upper and lower back support frames and allowing for forward and aft pivoting displacement of said upper back support frame relative to said lower back support frame.
Claim 9
Dependent Claim
37 words
The seating system of claim 7 wherein said hinge means includes first stop means disposed within said back cushion for limiting forward pivoting displacement of said upper back support frame relative to said lower back support frame.
Claim 10
Dependent Claim
31 words
The seating system of claim 8 wherein said first stop means is adjustable to allow for forward pivoting displacement of said upper back support frame over a range of displacement values.
Claim 11
Dependent Claim
37 words
The seating system of claim 7 wherein said hinge means includes second stop means disposed within said back cushion for limiting aft pivoting displacement of said upper back support frame relative to said lower back support frame.
Claim 12
Dependent Claim
31 words
The seating system of claim 10 wherein said second stop means is adjustable to allow for aft pivoting displacement of said upper back support frame over a range of displacement values.
Claim 13
Dependent Claim
127 words
A seating support arrangement comprising: a support structure including a seat integral therewith for engaging and supporting buttocks and thigh portions of a user; a back assembly for engaging and supporting a back portion of a user; first mounting means pivotally coupled to said back assembly for mounting said back assembly to said support structure in a removable manner; second mounting means for coupling an upper portion of said back assembly to said support structure in a removable manner; and hinge means in said back assembly for displacing a lower portion of said back assembly forward upon rearward displacement of an upper portion of said back assembly by a user, wherein said back assembly includes upper and lower internal support frames pivotally coupled by said hinge means.
Claim 14
Dependent Claim
127 words
A seating support arrangement comprising: a support structure including a seat integral therewith for engaging and supporting buttocks and thigh portions of a user; a back assembly for engaging and supporting a back portion of a user; first mounting means pivotally coupled to said back assembly for mounting said back assembly to said support structure in a removable manner; second mounting means for coupling an upper portion of said back assembly to said support structure in a removable manner; and hinge means in said back assembly for displacing a lower portion of said back assembly forward upon rearward displacement of an upper portion of said back assembly by a user, wherein said back assembly includes upper and lower internal support frames pivotally coupled by said hinge means.
Claim 15
Dependent Claim
34 words
The seating support arrangement of claim 12 wherein a lower back portion of the user undergoes extension and a portion of the user's weight may be removed from said seat for enhanced user comfort.
Claim 16
Dependent Claim
60 words
The seating support arrangement of claim 13 wherein said back assembly includes upper and lower internal support frames pivotally coupled by said hinge means, and wherein said lower back support frame includes a plurality of telescoping members for allowing the length of a lower portion of said back assembly to be adjusted in accordance with the size of a user.
Claim 17
Dependent Claim
37 words
The seating support arrangement of claim 13 wherein said back assembly includes an internal support frame having a deformable cross member adapted for shaping in accordance with the contour of a back support surface of a user.
Claim 18
Dependent Claim
50 words
The seating arrangement of claim 13 wherein said back assembly and said first mounting means each include respective coupled angle hinge bar portions to permit said back assembly and said mounting means to assume a closely spaced, parallel alignment when in a folded configuration after removal from said support structure.
Claim 19
Dependent Claim
24 words
The seating support arrangement of claim 13 wherein said hinge means includes locking means for securing said back assembly in a given fixed configuration.
Claim 20
Dependent Claim
33 words
The seating support arrangement of claim 13 wherein an aft lower surface of said back assembly includes a plurality of spaced corrugations to facilitate flexure of a lower portion of said back assembly.
Claim 21
Dependent Claim
106 words
A seating arrangement for mounting to a rigid support base having first and second structural members, said seating arrangement comprising: a seat support; a flexible back support pivotally coupled to an aft portion of said seat support; first coupling means for fixedly mounting said seat support to the first structural members of the support base; and second coupling means for attaching said back support to the second structural members of the support base in a sliding manner so as to allow an upper portion of said back support to be displaced along and in engagement with the second structural members as said back support is flexed.
Claim 22
Dependent Claim
106 words
A seating arrangement for mounting to a rigid support base having first and second structural members, said seating arrangement comprising: a seat support; a flexible back support pivotally coupled to an aft portion of said seat support; first coupling means for fixedly mounting said seat support to the first structural members of the support base; and second coupling means for attaching said back support to the second structural members of the support base in a sliding manner so as to allow an upper portion of said back support to be displaced along and in engagement with the second structural members as said back support is flexed.
Claim 23
Dependent Claim
21 words
The seating arrangement of claim 19 wherein said first coupling means includes aft positioning and support means and forward locking means.
Claim 24
Dependent Claim
54 words
The seating arrangement of claim 20 wherein said forward locking means includes a plurality of support hooks each adapted to receive a respective first structural member and a plurality of manually operated locking members each movable between first and second positions and adapted to engage a first structural member when in said first position.
Claim 25
Dependent Claim
34 words
The seating arrangement of claim 19 wherein said second coupling means includes a plurality of hook members attached to said back support and adapted to engage a respective one of said second structural members.
References Cited (Backward Citations)
US2119023A
Cited
US2260352A
Cited
US2710647A
Cited
US2634794A
Cited
US3171686A
Cited
US3279848A
Cited
US3404917A
Cited
US3594039A
Cited
US3632165A
Cited
US3947067A
Cited
US4285544A
Cited
US3945651A
Cited
US3982785A
Cited
US3929374A
Cited
US4120530A
Cited
US4157203A
Cited
US4234228A
Cited
US4333683A
Cited
US4533177A
Cited
US4362335A
Cited
US4364603A
Cited
US4300249A
Cited
US4408800A
Cited
US4471994A
Cited
US4652049A
Cited
US4458942A
Cited
US4555136A
Cited
US4640547A
Cited
US4573736A
Cited
US4629249A
Cited
US4618185A
Cited
US4626028A
Cited
US4703974A
Cited
US4685730A
Cited
US4712835A
Cited
US4641884A
Cited
US4733910A
Cited
US4574901A
Cited
US4707028A
Cited
US4603904A
Cited
US4687250A
Cited
US4688851A
Cited
US4744603A
Cited
US4711491A
Cited
US4730871A
Cited
US4728150A
Cited
US4709963A
Cited
US4934755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |