Patent US1965409A successfully refreshed from Google Patents.
Patent US4869280A successfully refreshed from Google Patents.
US4869280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible crutch
Assignee: Individual
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Filing: 1988-07-01
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Granted: 1989-09-26
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Expires: 2008-07-01
Abstract
Abstract The collapsible crutch includes an elongated head section, at least upper and lower elongated, hollow midsections, and an elongated foot section. The head section has a mechanism for supporting a portion of the person using the crutch. The midsections are connected together by an elastic cord. A detachable coupler connects the head section to the upper midsection and a similar detachable coupler connects the lower midsection to the foot section. In an assembled mode, these sections are substantially axially aligned. The collapsible crutch also includes a coupling mechanism that provides a conjoined, axially and laterally stable, subassembly of the upper and lower midsections.
Inventors
- 👤 Joseph Ewing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:54
CPC Classifications
A; A61; A61H; A61H3/00; A61H3/02; F; F16; F16B; F16B7/00; F16B7/04; F16B7/0406; F16B7/0413; F16B7/042
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
317 words
A collapsible crutch for a person comprising: an elongated head section having, at its upper terminal end, means for supporting a portion of said person; at least upper and lower elongated, hollow midsections; first means for detachable mounting a lower end of said head section to an upper end of said upper midsection; elastic means coupling said upper and lower midsections together, said elastic means extending through an interior region in both said upper and lower midsections; coupling means having an upper extension that is adapted to be inserted into and closely fitted to an interior, lower terminal end region of said upper midsection, said coupling means having a lower extension that is adapted to e inserted into and closely fitted to an interior, upper terminal end region of said lower midsection, said elastic means extending through said coupling means, said coupling means substantially axially aligning said upper and lower midsections when inserted therein; means for respectively latching said upper and lower extensions of said coupling means to said upper and lower midsections, said means for latching includes at least one pin passing through holes in one of the closely fit extensions and midsections; a hand hold on one of said upper or said lower midsections; an elongated foot section having a lower terminal end adapted to support the crutch in a fully assembled mode, said foot section having an upper terminal end; and second means for detachably mounting said upper terminal end of said foot section to a lower terminal end of said lower midsection such that said lower midsection and said foot section are substantially axially aligned; whereby in said assembled mode, said head section, said upper and lower midsections, and said foot section define a substantially axially aligned support structure for said person and, in a collapsed mode, said head section, said upper and lower midsections, and said foot section form a compact assemblage.
Claim 2
Dependent Claim
317 words
A collapsible crutch for a person comprising: an elongated head section having, at its upper terminal end, means for supporting a portion of said person; at least upper and lower elongated, hollow midsections; first means for detachable mounting a lower end of said head section to an upper end of said upper midsection; elastic means coupling said upper and lower midsections together, said elastic means extending through an interior region in both said upper and lower midsections; coupling means having an upper extension that is adapted to be inserted into and closely fitted to an interior, lower terminal end region of said upper midsection, said coupling means having a lower extension that is adapted to e inserted into and closely fitted to an interior, upper terminal end region of said lower midsection, said elastic means extending through said coupling means, said coupling means substantially axially aligning said upper and lower midsections when inserted therein; means for respectively latching said upper and lower extensions of said coupling means to said upper and lower midsections, said means for latching includes at least one pin passing through holes in one of the closely fit extensions and midsections; a hand hold on one of said upper or said lower midsections; an elongated foot section having a lower terminal end adapted to support the crutch in a fully assembled mode, said foot section having an upper terminal end; and second means for detachably mounting said upper terminal end of said foot section to a lower terminal end of said lower midsection such that said lower midsection and said foot section are substantially axially aligned; whereby in said assembled mode, said head section, said upper and lower midsections, and said foot section define a substantially axially aligned support structure for said person and, in a collapsed mode, said head section, said upper and lower midsections, and said foot section form a compact assemblage.
Claim 3
Dependent Claim
174 words
A collapsible crutch as claimed in claim 1 including a further elongated, hollow midsection and a first and a second coupling means as said coupling means, said elastic means coupling said upper, lower and further midsections together, said first coupling means having first upper and lower extensions adapted to be respectively inserted, with a close fit, into said interior, lower terminal end region of said upper midsection and into said interior, upper terminal and region of said lower midsection, said second coupling means having second upper and lower extensions adapted to be respectively inserted, with a close fit, into said interior, lower terminal end region of said lower midsection and into an interior, upper terminal end region of said further midsection; the collapsible crutch including additional means for respectively latching said second upper and lower extensions to said lower terminal end of said lower midsection and to an upper terminal end of said further midsection; said second means for detachably mounting connecting a lower terminal end of said further midsection to said foot section.
Claim 4
Dependent Claim
21 words
A collapsible crutch as claimed in claim 1 including means for retaining said elastic means in said upper and lower midsections.
Claim 5
Dependent Claim
22 words
A collapsible crutch as claimed in claim 2 including means for retaining said elastic means in said upper and said further midsections.
Claim 6
Dependent Claim
39 words
A collapsible crutch as claimed in claim 2 wherein said interior end regions of said upper, said lower and said further midsections are sleeves that fit over said upper and lower extensions of said first and second coupling means.
Claim 7
Dependent Claim
24 words
A collapsible crutch as claimed in claim 2 wherein said head section, said upper, lower and further midsections and said foot section are tubular.
Claim 8
Dependent Claim
49 words
A collapsible crutch as claimed in claim 6 wherein said first and second coupling means each include a raised land between the upper and lower extensions, and the land having a top that is substantially flush with outer terminal end surfaces of the respective upper, lower and further midsections.
Claim 9
Dependent Claim
19 words
A collapsible crutch as claimed in claim 2 wherein said first and second coupling means are hollow, elongated structures.
Claim 10
Dependent Claim
54 words
A collapsible crutch as claimed in claim 1 wherein said means for latching includes a pair of pins, each pin passing through corresponding holes in one of the closely fit extensions and midsections, and said means for latching includes means for biasing said pair of pins outward way from said interior of said midsection.
Claim 11
Dependent Claim
55 words
A collapsible crutch as claimed in claim 2 wherein said means for latching includes a pair of pins, each pin passing through a corresponding hole in one of the closely fit extensions and midsections, and said means for latching includes means for biasing said pair of pins outward away from said interior of said midsection.
Claim 12
Dependent Claim
33 words
A collapsible crutch as claimed in claim 2 wherein said head section includes a lower terminal end region adapted to closely fit within an interior, upper terminal end region of said upper midsection.
Claim 13
Dependent Claim
67 words
A collapsible crutch as claimed in claim 2 wherein said first means for detachably mounting includes a threadable clasp that mounts on complementary threads on an outer, upper, terminal end region of said upper midsection, said clasp including an interior shoulder and a resilient stop member adapted to be forced against an upper terminal edge of said upper midsection and an adjacent portion of said head section.
Claim 14
Dependent Claim
33 words
A collapsible crutch as claimed in claim 2 wherein said foot section includes an upper terminal end region adapted to closely fit within an interior, lower terminal end region of said further midsection.
Claim 15
Dependent Claim
67 words
A collapsible crutch as claimed in claim 2 wherein said second means for detachably mounting includes a threadable clasp that mounts on complementary threads on an outer, lower terminal end region of said further midsection, said clasp including an interior shoulder and a resilient stop member adapted to be forced against a lower terminal edge of said further midsection and an adjacent portion of said foot section.
Claim 16
Dependent Claim
58 words
A collapsible crutch as claimed in claim 2 wherein said head section includes a lower terminal end region adapted to closely fit within an interior, upper terminal end region of said upper midsection, and said foot section includes an upper terminal end region adapted to closely fit within an interior, lower terminal end region of said further midsection.
Claim 17
Dependent Claim
31 words
A collapsible crutch as claimed in claim 15 including first and second means for respectively latching said head section to said upper midsection and said further midsection to said foot section.
Claim 18
Dependent Claim
74 words
A collapsible crutch as claimed in claim 16 wherein said first and second means for latching each include a pair of pins, each pin of said pair passing through corresponding holes in said head section and said upper midsection or in said foot section and said further midsection, said first and second means for latching each include means for biasing said pins outward away from the corresponding interior of said upper and further midsections.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |