US3871713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Braking system for vehicles having speed controlled proportional braking for front and rear wheels
Assignee: Individual
•
Filing: 1973-04-27
•
Granted: 1975-03-18
•
Expires: 1993-04-27
Abstract
Abstract A vehicle braking system employing proportional braking pressure below skid point for front and rear wheels according to the speed of the vehicle and prior to braking. To accomplish the invention, brake control mechanism is provided in the system for each of the front and rear braking member such that in general the faster the vehicle travels, the greater will be the braking force available to the front wheels and the lesser proportionately will be the braking force available to the rear wheels. The control mechanism mentioned may be operated hydraulically, electrically, or mechanically. The present system also includes a regulator for a central mechanism to vary the proportional braking according to road or other conditions, and further includes a control assembly operating in addition to the speed proportioning system and being driven by decelerating inertia forces of the vehicle.
Inventors
- 👤 Paul M Lister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:41
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/26
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
153 words
A brake system for vehicles comprising front and rear fluid operated braking means; individual brake applying means for said front and rear braking means operated by a brake pedal; conduit means communicating between said brake applying means and said braking means; and brake control means for each of said front and rear braking means; said brake control means including valves arranged to control flow of the brake applying fluid to the front and rear brakes, adjustment means operatively connected to said valves arranged to influence operation of said valves and provide proportionate braking to the front and rear wheels, and drive means connected to said adjustment means arranged to be connected to the drive shaft portion of a vehicle for positioning said adjustment means so that as the speed of the vehicle increases, greater braking force is made available to the front and rear wheel brakes prior to braking and in a proportion.
Claim 2
Dependent Claim
153 words
A brake system for vehicles comprising front and rear fluid operated braking means; individual brake applying means for said front and rear braking means operated by a brake pedal; conduit means communicating between said brake applying means and said braking means; and brake control means for each of said front and rear braking means; said brake control means including valves arranged to control flow of the brake applying fluid to the front and rear brakes, adjustment means operatively connected to said valves arranged to influence operation of said valves and provide proportionate braking to the front and rear wheels, and drive means connected to said adjustment means arranged to be connected to the drive shaft portion of a vehicle for positioning said adjustment means so that as the speed of the vehicle increases, greater braking force is made available to the front and rear wheel brakes prior to braking and in a proportion.
Claim 3
Dependent Claim
60 words
The brake system of claim 1 wherein said adjustment means includes a fluid operated cylinder having a plunger operatively connected to said valves and said drive means includes a pump for operating said plunger, the plunger associated with the front brakes being larger than the plunger for the rear brakes to provide the greater braking force to the front wheels.
Claim 4
Dependent Claim
21 words
The brake system of claim 2 wherein said adjustment means includes a gear connection between said drive means and said valves.
Claim 5
Dependent Claim
38 words
The brake system of claim 2 including regulating mechanism for said brake control means arranged to regulate the over-all braking force according to road conditions so as to prevent locking of the wheels under substantially any road condition.
Claim 6
Dependent Claim
55 words
The brake system of claim 1 wherein said adjustment means includes a fluid operated cylinder having a plunger operatively connected to said valves, said drive meanns including a pump for operating said plunger, and control means for said pump arranged to operatively connect said pump to said fluid operated cylinder only during a braking operation.
Claim 7
Dependent Claim
33 words
The brake system of claim 1 wherein said adjustment means includes a weighted lever operatively connected to said plunger and arranged to affect operatioN of said plunger by deceleration forces of the vehicle.
Claim 8
Dependent Claim
49 words
The braking system of claim 1 wherein said brake control means includes auxiliary control means operated by deceleration forces of the vehicle and arranged proportionately to make additional braking available to the front brakes and less braking available to the rear brakes with increased deceleration rate of the vehicle.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |