Patent US3875688A successfully refreshed from Google Patents.
US3875688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring-supported shoe appliance
Assignee: Lawrence Peska Associates Inc
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Filing: 1974-02-22
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Granted: 1975-04-08
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Expires: 1994-02-22
Abstract
Abstract A spring-supported shoe appliance comprising a support plate, a helical spring at the underside of the plate and means for securing the plate having the spring attached thereto, to the user''s foot. The appliance may include a flexible curtain or sleeve surrounding the spring.
Inventors
- 👤 Henry Mcnaughton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:33
CPC Classifications
A; A63; A63B; A63B25/00; A63B25/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
75 words
A spring-supported shoe appliance, comprising: a. a support plate comprising first and second opposite major surfaces and a rim portion at said first surface; b. a single helical spring having one end disposed at said first major surface and connected to said support plate said spring being disposed partially within said rim portion; and c. means for removably securing said support plate to said shoe, said shoe engaging said support plate at said second surface.
Claim 2
Dependent Claim
75 words
A spring-supported shoe appliance, comprising: a. a support plate comprising first and second opposite major surfaces and a rim portion at said first surface; b. a single helical spring having one end disposed at said first major surface and connected to said support plate said spring being disposed partially within said rim portion; and c. means for removably securing said support plate to said shoe, said shoe engaging said support plate at said second surface.
Claim 3
Dependent Claim
28 words
A spring-supported shoe appliance as defined in claim 1, wherein said support plate comprises plural apertures and said securing means comprises a flexible strand laced through said apertures.
Claim 4
Dependent Claim
24 words
A spring-supported shoe appliance as defined in claim 1, further comprising a flexible sleeve element suspended from said support plate and surrounding said spring.
Claim 5
Dependent Claim
28 words
A spring-supported shoe appliance as defined in claim 1, wherein the lateral portions of said spring extend beyond those of said shoe of the person utilizing said appliance.
Claim 6
Dependent Claim
49 words
A spring-supported shoe appliance as defined in claim 1, wherein said support plate comprises plural apertures and said securing means comprises a flexible strand laced through said apertures, and wherein an end portion of said spring is disposed between said support plate and a portion of said flexible strand.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |