US4647918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-event notification system for monitoring critical pressure points on persons with diminished sensation of the feet
Assignee: Individual
•
Filing: 1985-01-16
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Granted: 1987-03-03
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Expires: 2005-01-16
Abstract
Abstract A multi-event notification system for monitoring preselected critical pressure points, as a function of pressure in a lapsed time, on the feet of persons being diagnosed as having diminished sensation in the feet. A plurality of pressure transducers for measuring and monitoring pressure at any number of points on a patient's foot are electrically connected to a microprocessor. The processor is programmable to integrate when pressure is sensed at the sensing points over a preselected time interval. If any of a number of the sensing points reaches a preselected threshold of pressure events over the given time interval, an alarm indicator connected to the processor provides an alarm indication that the total number of pressure events exceeds the threshold limit.
Inventors
- 👤 William P. Goforth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:36
CPC Classifications
A; A43; A43B; A43B7/00; A43B3/00; A43B3/34; A43B7/14; A43B7/1405; A43B7/1455; A43B7/147; A61; A61B; A61B5/00; A61B5/103; A61B5/1036
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
162 words
A multi-event system for sensing pressure and time that a user of said system is putting pressure on his feet comprising: a foot pad having pressure transducers located at selected points beneath said user's foot; a microprocessor electrically connected in parallel to said transducers, said microprocessor having a means for registering a total number of sensing events, one of said sensing events occurring whenever any of said transducers senses pressure for longer than a first preselected time interval, said means for registering capable of deducting one of said sensing events from said total number of sensing events whenever a preselected number of said transducers do not sense pressure for longer than a second preselected time interval, said microprocessor having a means for comparing said total number of said sensing events to a threshold limit number of sensing events; and an alarm indicator connected to said microprocessor providing an alarm indication whenever said total number of said sensing events exceeds said threshold limit.
Claim 2
Dependent Claim
162 words
A multi-event system for sensing pressure and time that a user of said system is putting pressure on his feet comprising: a foot pad having pressure transducers located at selected points beneath said user's foot; a microprocessor electrically connected in parallel to said transducers, said microprocessor having a means for registering a total number of sensing events, one of said sensing events occurring whenever any of said transducers senses pressure for longer than a first preselected time interval, said means for registering capable of deducting one of said sensing events from said total number of sensing events whenever a preselected number of said transducers do not sense pressure for longer than a second preselected time interval, said microprocessor having a means for comparing said total number of said sensing events to a threshold limit number of sensing events; and an alarm indicator connected to said microprocessor providing an alarm indication whenever said total number of said sensing events exceeds said threshold limit.
Claim 3
Dependent Claim
51 words
The invention of claim 1 wherein said microprocessor further has a means for comparing said total number of sensing events to a reset number of sensing events and said alarm indicator providing a second indication whenever said total number of sensing events is less than said reset number of sensing events.
Claim 4
Dependent Claim
17 words
The invention of claim 1 wherein said first preselected time interval is each tenth of a second.
Claim 5
Dependent Claim
14 words
The invention of claim 3 wherein said second preselected time is each one second.
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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) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |