Patent US3763974A successfully refreshed from Google Patents.
US3763974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manifold vacuum control for power brakes
Assignee: CONVENTRY CLIMAX ENG Ltd
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Filing: 1972-05-08
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Granted: 1973-10-09
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Expires: 1992-05-08
Abstract
Abstract A vehicle having a diesel engine with a fuel supply controlled other than in dependence upon the pressure in the air intake manifold, and a servo assisted braking system the servo unit of which is connected directly to the intake manifold and is activated for application of the brakes by pressure reduction in the intake manifold upon actuation of a choke valve which throttles the air entering the intake manifold. Depression of a brake pedal will close the valve, the depression of an accelerator pedal will force the valve open regardless of the brake pedal position.
Inventors
- 👤 E Neal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:06
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/103; B60T13/00; B60T13/10; B60T13/24; B60T13/46; B60T13/52; F; F02; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
In a vehicle engine having an air intake manifold, a choke valve which throttles the air entering said intake manifold, fuel supply control means independent of the pressure in said air intake manifold, a servo assisted braking system, a brake pedal, and an accelerator control, the improvement according to which a servo unit of said braking system is connected directly to said air intake manifold and activated for application of the brakes by a depression in said intake manifold, and said brake pedal and accelerator control are connected to said choke valve by linkages such that, while actuation of said brake pedal will close said choke valve to create a depression in said manifold when said accelerator control is in its idle position, the actuation of said accelerator control will open said choke valve, regardless of the position of said brake pedal.
Claim 2
Dependent Claim
142 words
In a vehicle engine having an air intake manifold, a choke valve which throttles the air entering said intake manifold, fuel supply control means independent of the pressure in said air intake manifold, a servo assisted braking system, a brake pedal, and an accelerator control, the improvement according to which a servo unit of said braking system is connected directly to said air intake manifold and activated for application of the brakes by a depression in said intake manifold, and said brake pedal and accelerator control are connected to said choke valve by linkages such that, while actuation of said brake pedal will close said choke valve to create a depression in said manifold when said accelerator control is in its idle position, the actuation of said accelerator control will open said choke valve, regardless of the position of said brake pedal.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |