US3560919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear indicating signalling system for a brake lining,or the like
Assignee: Individual
•
Filing: 1968-11-12
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Granted: 1971-02-02
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Expires: 1988-11-12
Abstract
Abstract A PNEUMATIC SYSTEM IS PROVIDED FOR INDICATING EXCESSIVE WEAR OF A NORMALLY UNOBSERVABLE WEARING SURFACE, SUCH AS A BRAKE LINING. THE SYSTEM OF THE INVENTION INCLUDES AIR LINES COUPLED TO A PRESSURE TIGHT GROOVE IN THE BRAKE LINING AND TO A VACUUM PRESSURE OR POSITIVE PRESSURE SOURCE, SO AS TO MAINTAIN THE SYSTEM IN A NONOPERATIVE STATE SO LONG AS THE PRESSURE TIGHT INTEGRITY OF THE AFORESAID GROOVE IS MAINTAINED. WHEN THE WEAR OF THE BRAKE LINING REACHES A CRITICAL STATE, THE GROOVE IS EXPOSED, AND THE RESULTING PRESSURE CHANGE IN THE SYSTEM IS UTILIZED TO ACTIVATE A VISUAL OR AUDIBLE ALARM UNIT.
Inventors
- 👤 Armando R Uribe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:57
CPC Classifications
F; F16; F16D; F16D66/00; F16D66/02; F16D66/021; F16D66/028; F16D66/022; F16D66/023; F16D66/024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |