US3763975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake with vehicle speed & accelerator controls
Assignee: Individual
•
Filing: 1972-06-12
•
Granted: 1973-10-09
•
Expires: 1992-06-12
Abstract
Abstract Automatic braking apparatus for a vehicle including a spring opposed by a fluid pressure system whereby the spring applies the brakes only when the pressure of the fluid falls below a predetermined level, and an adjusting device for setting and limiting the force of the spring so that the braking force will always be the same in any operating conditions. A control system causes release of the fluid pressure upon the occurrence of a predetermined condition or more than one condition. The spring then applies the brakes. The control system may include a speed responsive device which causes release of the fluid pressure when the vehilce stops, and the control system is so arranged that the speed responsive device cannot again cause release of the brakes. The apparatus is capable of operation in different modes, and a selector device is employed to select a particular mode. One of the modes which can be selected by this device is effective to release the brakes without any other conditions occurring so that the vehicle can be worked on or hauled through a wash rack or towed, by way of example. A signal-ling device is employed to provide a warning in case of loss of fluid pressure due to failure.
Inventors
- 👤 J Fontaine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:15
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/103; B60T13/00; B60T13/10; B60T13/12; B60T13/22; B60T13/74; B60T17/00; B60T17/18; B60T17/22; B60T7/00; B60T7/12
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
101 words
A brake mechanism for a vehicle having spring means opposed by fluid pressure means whereby the spring means applies the brakes only when the pressure of said fluid pressure means falls below a predetermined level, and adjusting means for setting and limiting the force of said spring means, said fluid pressure means having control means for causing release of the fluid pressure when the vehicle stops, and said control means including speed responsive means in a first circuit which is broken when the vehicle stops, and acceleration responsive means in a second circuit which is broken when an accelerator is deactivated.
Claim 2
Dependent Claim
101 words
A brake mechanism for a vehicle having spring means opposed by fluid pressure means whereby the spring means applies the brakes only when the pressure of said fluid pressure means falls below a predetermined level, and adjusting means for setting and limiting the force of said spring means, said fluid pressure means having control means for causing release of the fluid pressure when the vehicle stops, and said control means including speed responsive means in a first circuit which is broken when the vehicle stops, and acceleration responsive means in a second circuit which is broken when an accelerator is deactivated.
Claim 3
Dependent Claim
39 words
The brake mechanism as claimed in claim 1 in which said first circuit is ineffective to release the brakes when said second circuit Is broken even if said first circuit is no longer broken by said speed responsive means.
Claim 4
Dependent Claim
26 words
The brake mechanism as claimed in claim 2 in which said control means has contacts breaking said first circuit except when said second circuit is completed.
Claim 5
Dependent Claim
17 words
The brake mechanism as claimed in claim 3 in which said contacts are part of a relay.
Claim 6
Dependent Claim
35 words
The brake mechanism as claimed in claim 1 in which said control means further includes a third circuit bypassing said first and second circuit and including switch contacts effective to release the brakes when closed.
Claim 7
Dependent Claim
20 words
The brake mechanism as claimed in claim 5 in which said switch contacts are part of a rotary switch means.
Claim 8
Dependent Claim
45 words
The brake mechanism as claimed in claim 1 in which said control means includes a warning light, and means responsive to said spring for causing said light to glow when said spring begins to extend and said control means has activated said fluid pressure means.
Claim 9
Dependent Claim
138 words
A brake mechanism including a chamber, a piston in said chamber, fluid pressure means for producing fluid pressure on said piston to effect release of brakes, spring means effective on the brakes to cause application of the brakes whenever the fluid pressure falls below a predetermined level, and control means for causing release of the fluid pressure upon a predetermined condition, said control means including speed responsive means in a first circuit which is broken when the vehicle stops, accelerator responsive means in a second circuit which is broken when an accelerator is deactivated, and contacts breaking said first circuit except when said second circuit is completed, so that said first circuit is ineffective to release the brakes when said second circuit is broken even if said first circuit is no longer broken by said speed responsive means.
Claim 10
Dependent Claim
138 words
A brake mechanism including a chamber, a piston in said chamber, fluid pressure means for producing fluid pressure on said piston to effect release of brakes, spring means effective on the brakes to cause application of the brakes whenever the fluid pressure falls below a predetermined level, and control means for causing release of the fluid pressure upon a predetermined condition, said control means including speed responsive means in a first circuit which is broken when the vehicle stops, accelerator responsive means in a second circuit which is broken when an accelerator is deactivated, and contacts breaking said first circuit except when said second circuit is completed, so that said first circuit is ineffective to release the brakes when said second circuit is broken even if said first circuit is no longer broken by said speed responsive means.
Claim 11
Dependent Claim
17 words
The brake mechanism as claimed in claim 8 in which said contacts are part of a relay.
Claim 12
Dependent Claim
35 words
The brake mechanism as claimed in claim 9 in which said control means further includes a third circuit bypassing said first and second circuits and including switch contacts effective to release the brakes when closed.
Claim 13
Dependent Claim
20 words
The brake mechanism as claimed in claim 10 in which said switch contacts are part of a rotary switch means.
Claim 14
Dependent Claim
45 words
The brake mechanism as claimed in claim 8 in which said control means includes a warning light, and means responsive to said spring for causing said warning light to glow when said spring is extended and said control means has activated said fluid pressure means.
Claim 15
Dependent Claim
133 words
A brake mechanism for a vehicle having spring means opposed by fluid pressure means whereby the spring means applies the brakes only when the pressure of said fluid pressure means falls below a predetermined level, said fluid pressure means having control means for causing release of the fluid pressure upon a predetermined condition, said control means including speed responsive means in a first circuit which is broken when the vehicle stops, accelerator responsive means in a second circuit which is broken when an accelerator of the vehicle is deactivated, and contacts breaking said first circuit except when said second circuit is completed, so that said first circuit is ineffective to release the brakes when said second circuit is broken even if said first circuit is no longer broken by said speed responsive means.
Claim 16
Dependent Claim
133 words
A brake mechanism for a vehicle having spring means opposed by fluid pressure means whereby the spring means applies the brakes only when the pressure of said fluid pressure means falls below a predetermined level, said fluid pressure means having control means for causing release of the fluid pressure upon a predetermined condition, said control means including speed responsive means in a first circuit which is broken when the vehicle stops, accelerator responsive means in a second circuit which is broken when an accelerator of the vehicle is deactivated, and contacts breaking said first circuit except when said second circuit is completed, so that said first circuit is ineffective to release the brakes when said second circuit is broken even if said first circuit is no longer broken by said speed responsive means.
Claim 17
Dependent Claim
17 words
The brake mechanism as claimed in claim 13 in which said contacts are part of a relay.
Claim 18
Dependent Claim
35 words
The brake mechanism as claimed in claim 14 in which said control means further includes a third circuit bypassing said first and second circuits and including switch contacts effective when closed to release the brakes.
Claim 19
Dependent Claim
20 words
The brake mechanism as claimed in claim 15 in which said switch contacts are part of a rotary switch means.
Claim 20
Dependent Claim
45 words
The brake mechanism as claimed in claim 13 in which said control means includes a warning light, and means responsive to said spring for causing said light to glow when said spring begins to extend and said control means has actiVated said fluid pressure means.
Claim 21
Dependent Claim
18 words
The brake mechanism as claimed in claim 13 in which said control means includes vacuum controlled valve means.
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 |