US3974491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Load signaling device for a patient's foot
Assignee: GlaxoSmithKline LLC
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Filing: 1974-07-22
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Granted: 1976-08-10
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Expires: 1994-07-22
Abstract
Abstract A device for signaling a patient when a predetermined load is placed on the patient's foot comprises a resilient foot pad having a toe end and a heel end and adapted to substantially cover the inner sole of a shoe. A resilient liquid filled tube is mounted within the pad with the tube extending from adjacent the toe end to adjacent the heel end of the pad. A signaling device is controlled by a pressure responsive means in communication with the liquid in the tube for the actuation of the signaling means at a predetermined pressure of said liquid.
Inventors
- 👤 John Joseph Sipe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:07
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/22; H01H3/24; A; A61; A61B; A61B5/00; A61B5/103; A61B5/1036; G; G01; G01G; G01G19/00; G01G19/44; H01H3/02; H01H3/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
98 words
A device for signaling a patient when a predetermined load is placed on the patient's foot comprising: a resilient foot pad having a toe end and a heel end and adapted to overlie the inner sole of a shoe. a resilient tube mounted within said pad, said tube extending from adjacent the toe end of the pad to adjacent the heel end of the pad, a liquid filling said tube, signaling means, pressure responsive means in communication with the liquid in said tube to control the actuation of said signaling means at a predetermined pressure of said liquid.
Claim 2
Independent Claim
98 words
A device for signaling a patient when a predetermined load is placed on the patient's foot comprising: a resilient foot pad having a toe end and a heel end and adapted to overlie the inner sole of a shoe. a resilient tube mounted within said pad, said tube extending from adjacent the toe end of the pad to adjacent the heel end of the pad, a liquid filling said tube, signaling means, pressure responsive means in communication with the liquid in said tube to control the actuation of said signaling means at a predetermined pressure of said liquid.
Claim 3
Dependent Claim
18 words
The device of claim 1 in which the tube has a plurality of loops within the foot pad.
Claim 4
Dependent Claim
23 words
The device of claim 1 in which the pressure responsive means includes a resilient expansible member and a switch actuated by said member.
Claim 5
Dependent Claim
13 words
The device of claim 3 in which the expansible member is a bladder.
Claim 6
Dependent Claim
19 words
The device of claim 1 having adjustable means to vary the pressure at which the signaling means is actuated.
References Cited (Backward Citations)
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US2558805A
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US2972132A
Cited
US3305036A
Cited
US3702999A
Cited
US3791375A
Cited
US3699398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |