Patent US3699513A successfully refreshed from Google Patents.
US3699513A
Expired / Lapsed
US
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Warning device for a split fluid pressure braking system
Assignee: Bendix Corp
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Filing: 1971-07-15
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Granted: 1972-10-17
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Expires: 1991-07-15
Abstract
Abstract A warning device for a split fluid pressure braking system, comprising a first single switch controlling the activation of stop lights of a vehicle upon build-up of pressure in at least one of the sub-system, and a second single switch controlling the activation of a warning signal device upon a differential of pressure between the two braking sub-systems.
Inventors
- 👤 Philippe Nicodeme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:51
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/18; B60T17/22; B60T17/226
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
138 words
A warning device for a split fluid pressure braking system comprising a stop light controlled by first switch means actuated in response to pressurization of at least one of the two independent sub-systems of the braking system and a failure signal device controlled by second switch means actuated in response to displacement away from a normal position of a movable piston sealingly slidable in a bore to define therein two opposed fluid chambers connected to the two independent braking subsystems respectively, said first switch means being actuated by a movable piston means responsive on the one hand to the fluid pressure in one of said fluid chambers and on the other hand to an abnormal displacement of said movable piston inwardly the said one fluid chamber as a result of a failure in the braking subsystem connected thereto.
Claim 2
Dependent Claim
138 words
A warning device for a split fluid pressure braking system comprising a stop light controlled by first switch means actuated in response to pressurization of at least one of the two independent sub-systems of the braking system and a failure signal device controlled by second switch means actuated in response to displacement away from a normal position of a movable piston sealingly slidable in a bore to define therein two opposed fluid chambers connected to the two independent braking subsystems respectively, said first switch means being actuated by a movable piston means responsive on the one hand to the fluid pressure in one of said fluid chambers and on the other hand to an abnormal displacement of said movable piston inwardly the said one fluid chamber as a result of a failure in the braking subsystem connected thereto.
Claim 3
Dependent Claim
55 words
A warning device according to claim 1 wherein said piston means is comprised of a plunger sealingly slidable in said one fluid chamber substantially coaxially with said movable piston to be engaged thereby for actuating said first switch means in the event of a failure in the braking sub-system connected to said one fluid chamber.
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |