Patent US3754795A successfully refreshed from Google Patents.
US3754795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle braking system
Assignee: Robert Bosch GmbH
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Filing: 1971-08-05
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Granted: 1973-08-28
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Expires: 1991-08-05
Abstract
Abstract Rotatable road wheels of a vehicle are associated with fluidoperated brakes and with pressure-exerting brake-operating means for operating the brakes. An anti-blocking system is provided between the brakes and the brake-operating means and has a sensor which senses the revolutions of the road wheels, an electromagnetic valve controlled by the sensor and able to switch on and off a source of compressed air, a control valve which controls the flow of brake fluid to the brakes and which is movable between an open and a closed position, and a reducing piston which switches the control valve between its positions and which is movable in a sense switching the control valve to closed position under the influence of pressure fluid from the compressed air source, and in a sense switching the control valve to open position under the influence of pressure exerted by the brake-operating means.
Inventors
- 👤 Lowis A Von
- 👤 J Trui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:10
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/42; B60T8/4208; B60T8/4225; B60T8/4241; B60T8/44; B60T8/443; B60T8/46
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
208 words
In a vehicle having a source of pressure fluid, in combination, rotatable road wheels; fluid-operated brake means for braking the rotation of said road wheels; pressure exerting brake-operating means associated with said brake means; antiblocking means interposed between said brake means and brakeoperating means said anti-blocking means comprising sensing means sensing the revolutions of said road wheels, valve means controlling the flow of fluid to said brake means,and being movable between an open and a closed position, electro-magnetic valve means controlled by said sensing means and operative for connecting said source of pressure fluid with said control valve means, and a reducing piston switching said control valve means, and being movable in a sense switching said control valve means to closed position under the influence of pressure fluid from said source, and in a sense switching said control valve means to open position under the influence of pressure from said brakeoperating means; brake line means connecting said brake operating means with said anti-blocking means and the latter with said brake means; and a pneumatically operated cylinder-and-piston unit interposed in said brake line means intermediate said brakeoperating means and said anti-blocking means and receiving from the former fluid the same fluid as said reducing piston receives from said source.
Claim 2
Dependent Claim
208 words
In a vehicle having a source of pressure fluid, in combination, rotatable road wheels; fluid-operated brake means for braking the rotation of said road wheels; pressure exerting brake-operating means associated with said brake means; antiblocking means interposed between said brake means and brakeoperating means said anti-blocking means comprising sensing means sensing the revolutions of said road wheels, valve means controlling the flow of fluid to said brake means,and being movable between an open and a closed position, electro-magnetic valve means controlled by said sensing means and operative for connecting said source of pressure fluid with said control valve means, and a reducing piston switching said control valve means, and being movable in a sense switching said control valve means to closed position under the influence of pressure fluid from said source, and in a sense switching said control valve means to open position under the influence of pressure from said brakeoperating means; brake line means connecting said brake operating means with said anti-blocking means and the latter with said brake means; and a pneumatically operated cylinder-and-piston unit interposed in said brake line means intermediate said brakeoperating means and said anti-blocking means and receiving from the former fluid the same fluid as said reducing piston receives from said source.
Claim 3
Dependent Claim
27 words
In a vehicle as defined in claim 1, further comprising a regulating valve for adjusting the pressure which acts upon said reducing piston from said brake-operating means.
Claim 4
Dependent Claim
16 words
In a vehicle as defined in claim 1, wherein said cylinder-and-piston unit is a hydraulic unit.
Claim 5
Dependent Claim
18 words
In a vehicle as defined in claim 1, wherein said fluid supplied by said source is pressurized air.
References Cited (Backward Citations)
US3623778A
Cited
US3666328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |