US3688879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary brake system
Assignee: Individual
•
Filing: 1970-07-07
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Granted: 1972-09-05
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Expires: 1990-07-07
Abstract
Abstract An emergency brake system which effects an automatic engagement of the wheel brakes of a vehicle upon failure of the main brake system. The auxiliary brake system also provides for the engagement of the brakes when the engine is shut off as in parking. The auxiliary brake cylinders act radially on the brake shoes thus simplifying the construction over the prior art. The source of fluid pressure for the auxiliary brake system is conveniently mounted on the master cylinder of the conventional system thus lending the invention to a simple installation.
Inventors
- 👤 Arnold A Buletti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:07
CPC Classifications
F; F16; F16D; F16D59/00; F16D59/02; B; B60; B60T; B60T13/00; B60T13/10; B60T13/12; B60T13/22; F16D51/00; F16D51/16; F16D51/18; F16D51/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
148 words
In a fluid actuated brake system that includes a master cylinder and a brake cylinder operatively connecting said master cylinder with a wheel brake, an auxiliary brake cylinder operatively connected with said wheel brake for disengaging said brake when fluid under pressure is applied thereto, continuously acting force means cooperating with said auxiliary brake cylinder for urging the latter toward brake engaged position at all times, a conduit connecting said auxiliary cylinder with said master cylinder for applying fluid pressure to said auxiliary cylinder when the pressure is raised beyond a predetermined amount in said master cylinder, normally closed valve means in said conduit for normally preventing reverse flow from said auxiliary cylinder to said master cylinder, a second conduit connecting said auxiliary cylinder with the reservoir of said master cylinder, and second valve means for opening and closing said second conduit and actuated by an ignition lock.
Claim 2
Dependent Claim
148 words
In a fluid actuated brake system that includes a master cylinder and a brake cylinder operatively connecting said master cylinder with a wheel brake, an auxiliary brake cylinder operatively connected with said wheel brake for disengaging said brake when fluid under pressure is applied thereto, continuously acting force means cooperating with said auxiliary brake cylinder for urging the latter toward brake engaged position at all times, a conduit connecting said auxiliary cylinder with said master cylinder for applying fluid pressure to said auxiliary cylinder when the pressure is raised beyond a predetermined amount in said master cylinder, normally closed valve means in said conduit for normally preventing reverse flow from said auxiliary cylinder to said master cylinder, a second conduit connecting said auxiliary cylinder with the reservoir of said master cylinder, and second valve means for opening and closing said second conduit and actuated by an ignition lock.
Claim 3
Dependent Claim
27 words
A system according to claim 1 wherein said second valve means is open when said ignition lock is locked and closed when said ignition lock is unlocked.
Claim 4
Dependent Claim
33 words
A system according to claim 2 wherein said lock is provided with an intermediate position between locked and unlocked positions with said valve being open when said lock is iN said intermediate position.
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |