US3827762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Braking systems for vehicles
Assignee: ZF International UK Ltd
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Filing: 1973-03-07
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Granted: 1974-08-06
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Expires: 1993-03-07
Abstract
Abstract In a vehicle braking system the brakes of the vehicle are controlled automatically in some circumstances, for example during potential skidding. A vacuum actuator provides servoassistance in the system, and a comparator receives a signal representing the required braking pressure and a further signal representing actual braking pressure. This latter signal is obtained by measuring the pressure drop across the vacuum actuator. The comparator controls the braking pressure.
Inventors
- 👤 A Ives
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:36
CPC Classifications
B; B60; B60T; B60T7/00; B60T7/12; B60T7/22; B60K; B60K31/00; B60K31/0008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A braking system for a vehicle, in which the brakes of the vehicle are, at least in some circumstances, controlled automatically, including means for applying the brakes of the vehicle, said means incorporating a vacuum actuator providing servo-assistance in the system, and a comparator which receives a signal Representing the required braking pressure, and a further signal which represents actual braking pressure and is obtained by measuring the pressure drop across the vacuum actuator, the comparator producing an output which is used to control the braking pressure.
Claim 2
Dependent Claim
87 words
A braking system for a vehicle, in which the brakes of the vehicle are, at least in some circumstances, controlled automatically, including means for applying the brakes of the vehicle, said means incorporating a vacuum actuator providing servo-assistance in the system, and a comparator which receives a signal Representing the required braking pressure, and a further signal which represents actual braking pressure and is obtained by measuring the pressure drop across the vacuum actuator, the comparator producing an output which is used to control the braking pressure.
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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |