US4153307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheel lock prevention apparatus
Assignee: Robert Bosch GmbH
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Filing: 1977-05-25
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Granted: 1979-05-08
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Expires: 1997-05-25
Abstract
Abstract A wheel lock prevention apparatus for the brakes of a motor vehicle having a common control of the pressure applied to the brake cylinders of a particular vehicle axle in which a 3/2-way valve is arranged to control pressure in the line leading to the respective wheel cylinders with individual 2/2-way valves located in another line between the respective brake cylinders and ahead of the 3/2-way valve.
Inventors
- 👤 Hermann J. Goebels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:48
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/343; B60T8/36; B60T8/3605
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
83 words
Wheel lock prevention apparatus for the brakes of a motor vehicle having a common control of the pressure applied to the brake cylinders of a given vehicle axle, the improvement wherein a 3/2-way valve is positioned in a brake line extending to the two brake cylinders associated with the respective wheels, said 3/2-way valve including a further brake branch line that extends to individual 2/2-way valves that are provided in the control system between said first 3/2-way valve and said respective brake cylinders.
Claim 2
Dependent Claim
83 words
Wheel lock prevention apparatus for the brakes of a motor vehicle having a common control of the pressure applied to the brake cylinders of a given vehicle axle, the improvement wherein a 3/2-way valve is positioned in a brake line extending to the two brake cylinders associated with the respective wheels, said 3/2-way valve including a further brake branch line that extends to individual 2/2-way valves that are provided in the control system between said first 3/2-way valve and said respective brake cylinders.
Claim 3
Dependent Claim
32 words
Wheel lock prevention apparatus as claimed in claim 1, in which each said valve is arranged to be actuated by means of individual 3/2-way magnetic valves which comprise a pre-control valve means.
Claim 4
Dependent Claim
18 words
Wheel lock prevention apparatus as claimed in claim 1, in which the 3/2-way valve is a relay valve.
Claim 5
Dependent Claim
18 words
Wheel lock prevention apparatus as claimed in claim 2, in which the 3/2-way valve is a relay valve.
Claim 6
Dependent Claim
35 words
Wheel lock prevention apparatus as claimed in claim 1, in which during the pressure maintenance phase of a brake cylinder, the pressure increase in the other brake cylinder could be interrupted by a holding phase.
Claim 7
Dependent Claim
34 words
Wheel lock prevention apparatus as claimed in claim 1, in which during the pressure descent phase of a brake cylinder, the pressure increase in the other brake cylinder is interrupted by a holding phase.
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) | 1982-05-07 | 1982-11-06 | 1983-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-07 | 1986-11-06 | 1987-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-07 | 1990-11-06 | 1991-05-08 | $7700.00 | Window Closed / Lapsed |