US3923345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-skid braking system with torque sensing means
Assignee: Individual
•
Filing: 1974-10-03
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Granted: 1975-12-02
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Expires: 1994-10-03
Abstract
Abstract A vehicle wheel anti-skid braking system is provided which senses the torque applied to a vehicle wheel by the road and uses this torque to control the brake force, thereby limiting the brake torque capacity of the anti-skid braking system in such a way that it cannot exceed the torque capacity of the wheel-road contact.
Inventors
- 👤 Joseph Louis Poggie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:41
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/52; F; F16; F16D; F16D66/00; F16D2066/005; F16D2121/00; F16D2121/02; F16D2127/00; F16D2127/08
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
295 words
An anti-skid brake system comprising in combination: a. brake pedal means for actuation by an operator; b. master cylinder means operatively connected to said brake pedal means for actuation of a brake system responsive to actuation of said brake pedal means; c. a pilot brake means operatively connected to said master cylinder means for actuation by said master cylinder means to apply frictional braking force to resist a rotating wheel, said pilot brake means having at least a portion thereof movably responsive to said rotating wheel when said pilot brake means is resisting the rotation of said wheel; d. a force balancing main control valve in fluid connection with the master cylinder means, said force balancing main control valve being mechanically operated in one direction by the movement of said pilot brake means as the pilot brake means resists wheel rotation; e. main brake means operatively connected to said master cylinder means through said force balancing main control valve for actuation thereby by the movement of said force balancing main control valve responsive to the actuation of said pilot brake means to resist the rotation of said wheel whereby said main brake means is responsive to force from said rotating wheel when said pilot brake is actuated to resist the rotation of said wheel, said force balancing main control valve controlling fluid pressure in the main brake means and being operated in opposition to the movement of the pilot brake means by the main brake fluid pressure; f. a second control valve means in fluid connection with the main brake fluid circuit and the force balancing main control valve assembly being mechanically operated by the movement of the pilot brake as the pilot brake resists wheel rotation when backing up or holding on an upgrade.
Claim 2
Dependent Claim
295 words
An anti-skid brake system comprising in combination: a. brake pedal means for actuation by an operator; b. master cylinder means operatively connected to said brake pedal means for actuation of a brake system responsive to actuation of said brake pedal means; c. a pilot brake means operatively connected to said master cylinder means for actuation by said master cylinder means to apply frictional braking force to resist a rotating wheel, said pilot brake means having at least a portion thereof movably responsive to said rotating wheel when said pilot brake means is resisting the rotation of said wheel; d. a force balancing main control valve in fluid connection with the master cylinder means, said force balancing main control valve being mechanically operated in one direction by the movement of said pilot brake means as the pilot brake means resists wheel rotation; e. main brake means operatively connected to said master cylinder means through said force balancing main control valve for actuation thereby by the movement of said force balancing main control valve responsive to the actuation of said pilot brake means to resist the rotation of said wheel whereby said main brake means is responsive to force from said rotating wheel when said pilot brake is actuated to resist the rotation of said wheel, said force balancing main control valve controlling fluid pressure in the main brake means and being operated in opposition to the movement of the pilot brake means by the main brake fluid pressure; f. a second control valve means in fluid connection with the main brake fluid circuit and the force balancing main control valve assembly being mechanically operated by the movement of the pilot brake as the pilot brake resists wheel rotation when backing up or holding on an upgrade.
Claim 3
Dependent Claim
100 words
The apparatus in accordance with claim 1 in which said pilot brake means operates at least one slidable piston connected thereto and slidable in a cylinder responsive to the movement of at least a portion of said pilot brake means to control fluid pressure responsive to said sliding piston to drive said main brake means and said pilot brake means having brake pads for actuation against a rotatable brake disc attached to said rotating wheel for rotation with said wheel and said piston being controlled in part by the movement of said pilot brake braking pads engaging said rotating disc.
Claim 4
Dependent Claim
84 words
The apparatus in accordance with claim 2 in which there is a second piston slidable in a cylinder responsive to braking said rotating brake disc, said second slidable piston being actuated when a portion of said pilot brake means moves in a reverse direction as when the brake is applied when the vehicle is backing up or holding on an upgrade, said second slidable piston being actuated when said pilot brake means is moved responsive to the braking of said rotating wheel brake disc.
Claim 5
Dependent Claim
81 words
A vehicle wheel anti-skid braking system in accordance with claim 1 in which said main brake means has a main brake fluid circuit connecting said main brake means with said force balancing main control valve to apply a force to said force balancing main control valve opposing the force of said pilot brake means whereby a reduced force from said pilot brake means upon increased fluid pressure from said master cylinder means tends to close said force balancing main control valve.
Claim 6
Dependent Claim
66 words
The apparatus in accordance with claim 4 in which a third control valve is operatively connected to said master cylinder means and to said main brake fluid circuit to shut off the pilot braking means upon increase in said fluid pressure from said master cylinder without sufficient pressure from said main brake fluid circuit whereby braking by said pilot brake means is reduced under skid conditions.
Claim 7
Dependent Claim
217 words
An anti-skid brake system comprising in combination: a. a main brake for braking a rotating wheel when actuated by fluid pressure; b. a force balancing main control valve operatively connected to said main brake for regulating the fluid pressure applied to said main brake; c. fluid pressure generating means operatively connected to said force balancing main control valve for applying fluid pressure to said main brake through said force balancing main control valve when said force balancing main control valve is at least partially open; d. a pilot brake having a pilot brake movable portion movably connected to the main brake for applying a braking force to said rotating wheel when actuated and being operatively connected to said fluid pressure generating means for appling fluid pressure from said fluid pressure generating means to said pilot brake to actuate said pilot brake, said pilot brake having said movable portion movably mounted to a support of said main brake for movement when a braking force is applied by said pilot brake, said movable portion of said pilot brake located to activate said force balancing main control valve when the movable portion of said pilot brake is moved responsive to said pilot braking force, resisting rotation of said rotating wheel, whereby said main brake is controlled by the pilot brake.
Claim 8
Dependent Claim
217 words
An anti-skid brake system comprising in combination: a. a main brake for braking a rotating wheel when actuated by fluid pressure; b. a force balancing main control valve operatively connected to said main brake for regulating the fluid pressure applied to said main brake; c. fluid pressure generating means operatively connected to said force balancing main control valve for applying fluid pressure to said main brake through said force balancing main control valve when said force balancing main control valve is at least partially open; d. a pilot brake having a pilot brake movable portion movably connected to the main brake for applying a braking force to said rotating wheel when actuated and being operatively connected to said fluid pressure generating means for appling fluid pressure from said fluid pressure generating means to said pilot brake to actuate said pilot brake, said pilot brake having said movable portion movably mounted to a support of said main brake for movement when a braking force is applied by said pilot brake, said movable portion of said pilot brake located to activate said force balancing main control valve when the movable portion of said pilot brake is moved responsive to said pilot braking force, resisting rotation of said rotating wheel, whereby said main brake is controlled by the pilot brake.
Claim 9
Dependent Claim
108 words
The brake system in accordance with Claim 6 in which said main brake system includes a main brake fluid circuit connecting said main brake to said force balancing main control valve, said main brake fluid circuit also having an auxiliary connection to said force balancing main control valve for applying fluid pressure opposing said force balancing main valve actuation by said pilot brake responsive to the fluid pressure in said main brake fluid circuit. 8.The brake system in accordance with claim 7 in which Said main brake fluid circuit auxiliary line applies fluid pressure to a piston sliding in a cylinder in said force balancing main control valve.
Claim 10
Dependent Claim
65 words
The brake system in accordance with claim 8 in which a reverse control valve is located adjacent said movable portion of said pilot brake and actuated by movement of said movable portion of said pilot brake responsive to a braking force on said pilot brake resisting rotation of said rotating wheel in an opposite direction from the rotation required to actuate said main control valve.
Claim 11
Dependent Claim
41 words
A brake system in accordance with claim 9 in which said reverse control valve and said main control valve each include slidable pistons in a cylinder, mechanically operable by the movement of said pilot brake and each having spring centering means.
Claim 12
Dependent Claim
67 words
A brake system in accordance with claim 7 including a limiting valve operatively connected to said fluid pressure generating means and to said main brake fluid circuit for disengaging said pilot brake responsive to increased pressure from said fluid pressure generating means when said main brake fluid circuit has reduced pressure therein whereby said pilot brake is prevented from causing skidding by increased fluid pressure applied thereto.
Claim 13
Dependent Claim
50 words
A brake system in accordance with claim 11 in which said limiting valve has a slidable piston in a cylinder slidable in two directions responsive to fluid pressure from said main brake fluid circuit on one side thereof and from the pilot brake fluid circuit on the opposite side thereof.
Claim 14
Dependent Claim
40 words
A brake system in accordance with claim 6 in which said pilot brake is mounted on a pivotable arm to allow movement in two directions responsive to a rotating wheel having a braking force applied thereto by said pilot brake.
Claim 15
Dependent Claim
40 words
A brake system in accordance with claim 13 in which said rotating wheel has a brake disc attached thereto and said pilot brake and said main brake each including brake pads for engaging said rotatable disc responsive to fluid pressure.
Claim 16
Dependent Claim
201 words
An anti-skid system comprising in combination: a. a rotatable wheel; b. a rotatable disc attached to said rotatable wheel for rotation therewith; c. a fluid actuated first brake means having a fluid driven brake shoe and brake pad thereon for engaging said rotatable disc when actuated; d. fluid pressure control means operatively connected to said first brake means for controlling fluid pressure when said first brake means is actuated against a rotating disc by the movement of a portion of said first brake means; and e. a brake fluid actuated second brake means having a fluid driven brake shoe and brake pads and being operatively connected to said first brake means fluid pressure control means for actuation thereby; f. said first brake means having a brake cylinder for actuating said brake pads to contact with said rotatable disc; and said fluid pressure control means having a pair of pistons each riding in a cylinder, said pistons being operatively connected to said first brake means for actuation by the movement of said first brake means responsive to the engagement of said first brake means with a rotating rotatable disc, one cylinder being actuated for each direction of rotation of said rotatable disc.
Claim 17
Dependent Claim
201 words
An anti-skid system comprising in combination: a. a rotatable wheel; b. a rotatable disc attached to said rotatable wheel for rotation therewith; c. a fluid actuated first brake means having a fluid driven brake shoe and brake pad thereon for engaging said rotatable disc when actuated; d. fluid pressure control means operatively connected to said first brake means for controlling fluid pressure when said first brake means is actuated against a rotating disc by the movement of a portion of said first brake means; and e. a brake fluid actuated second brake means having a fluid driven brake shoe and brake pads and being operatively connected to said first brake means fluid pressure control means for actuation thereby; f. said first brake means having a brake cylinder for actuating said brake pads to contact with said rotatable disc; and said fluid pressure control means having a pair of pistons each riding in a cylinder, said pistons being operatively connected to said first brake means for actuation by the movement of said first brake means responsive to the engagement of said first brake means with a rotating rotatable disc, one cylinder being actuated for each direction of rotation of said rotatable disc.
Claim 18
Dependent Claim
65 words
An anti-skid brake system in accordance with claim 15 in which said brake system has a master cylinder fluid pressure generating means actuatable by an operator and operatively connected to said first brake means and a limiting valve means connected between said master cylinder fluid pressure generating means and said first brake means for limiting the pressure in said first brake means under predetermined conditions.
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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |