US4763958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for matching the brake pressure of vehicle combinations to the actual load
Assignee: VBG Produkter AB
•
Filing: 1985-10-17
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Granted: 1988-08-16
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Expires: 2005-10-17
Abstract
Abstract Apparatus for matching the brake pressure of vehicle combinations to the actual load comprising tranducers (36, 41) for adjusting the brake pressure of the units (10, 13) included in the vehicle combination, in dependence on pulling and pushing, respectively, of a coupling between the tractor vehicle and the trailer vehicle and in dependence on the loading of the vehicles.
Inventors
- 👤 Stephan N. A. Ohrgard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:16
CPC Classifications
B; B60; B60T; B60T7/00; B60T7/12; B60T7/20; B60T13/00; B60T13/10; B60T13/66; B60T13/662; B60T8/00; B60T8/26; B60T8/30
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
115 words
Vehicle combination comprising a tractor vehicle, a trailer vehicle, a coupling connecting said tractor vehicle to said trailer vehicle, air pressure brakes on said vehicles, air conduits for supplying pressurized air to said brakes, a transducer operatively connected to said coupling to provide a signal indicating pulling and pushing, respectively, of the coupling, a servo-regulator unit operatively connected to said air conduits for adjusting the pressure of pressurized air supplied to said brakes through said air conduits, and a central unit operatively connected to said servo-regulator unit and to said transducer for controlling said pressure in dependence on said signal provided by said transducer when the air pressure brakes of the vehicles are being actuated.
Claim 2
Dependent Claim
115 words
Vehicle combination comprising a tractor vehicle, a trailer vehicle, a coupling connecting said tractor vehicle to said trailer vehicle, air pressure brakes on said vehicles, air conduits for supplying pressurized air to said brakes, a transducer operatively connected to said coupling to provide a signal indicating pulling and pushing, respectively, of the coupling, a servo-regulator unit operatively connected to said air conduits for adjusting the pressure of pressurized air supplied to said brakes through said air conduits, and a central unit operatively connected to said servo-regulator unit and to said transducer for controlling said pressure in dependence on said signal provided by said transducer when the air pressure brakes of the vehicles are being actuated.
Claim 3
Dependent Claim
29 words
Vehicle combination as in claim 1 further comprising means in the tractor vehicle, operatively connected to the servo-regulator unit for shunting said unit when the trailer brake is actuated.
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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) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |