US5580136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake system for a motor vehicle
Assignee: Robert Bosch GmbH
•
Filing: 1995-05-30
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Granted: 1996-12-03
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Expires: 2015-05-30
Abstract
Abstract Valves for maintaining pressure at the vehicle brakes are activated when the vehicle reference speed falls below a predetermined value, whether the pressure is supplied by the brake pedal or an ASR. The energy supply for the valves is prevented from being switched off while the pressure is maintained.
Inventors
- 👤 Franz Hanschek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:43
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/175; B60T7/00; B60T7/12; B60T7/122; B60T8/176; B60T8/1761; B60T8/17616
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
79 words
Brake system for a motor vehicle having brakes assigned to vehicle wheels, said system comprising means for determining a vehicle reference speed, means for determining when said reference speed falls below a predetermined value, means for supplying pressure to said brakes, means for maintaining the pressure supplied to said brakes when said reference speed falls below a predetermined value, and means for preventing said means for maintaining the pressure from being switched off while said pressure is being maintained.
Claim 2
Dependent Claim
79 words
Brake system for a motor vehicle having brakes assigned to vehicle wheels, said system comprising means for determining a vehicle reference speed, means for determining when said reference speed falls below a predetermined value, means for supplying pressure to said brakes, means for maintaining the pressure supplied to said brakes when said reference speed falls below a predetermined value, and means for preventing said means for maintaining the pressure from being switched off while said pressure is being maintained.
Claim 3
Dependent Claim
41 words
Brake system as in claim 1 wherein said means for supplying pressure to said brakes comprises a brake pedal, said means for maintaining the pressure supplied by said brake pedal maintaining said pressure even after said brake pedal has been released.
Claim 4
Dependent Claim
47 words
Brake system as in claim 1 wherein said means for supplying pressure to said brakes comprises ASR means for supplying pressure at least one wheel, said means for maintaining pressure maintaining the pressure supplied by said ASR means when said reference speed falls below a predetermined value.
Claim 5
Dependent Claim
37 words
Brake system as in claim 1 wherein said means for maintaining the pressure supplied to said brakes comprises brake pressure control valves assigned to respective brakes, and an evaluation circuit for activating said brake pressure control valves.
Claim 6
Dependent Claim
25 words
Brake system as in claim 4 wherein said evaluation circuit comprises at least one of an anti-lock system (ABS) and an anti-slip regulation system (ASR).
Claim 7
Dependent Claim
49 words
Brake system as in claim 4 wherein said means for preventing said means for maintaining pressure from being switched off comprises an ignition interlock which inhibits switching off the ignition of the vehicle in response to a signal from said evaluation circuit indicating that said pressure is being maintained.
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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) | 1999-12-03 | 2000-06-03 | 2000-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-03 | 2004-06-03 | 2004-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-03 | 2008-06-03 | 2008-12-03 | $7700.00 | Window Closed / Lapsed |