Fluid-pressure and analogous brake systems – Pipeless valves
Patent
1975-12-15
1978-05-09
Blix, Trygve M.
Fluid-pressure and analogous brake systems
Pipeless valves
1376275, 303 98, 303115, B60T 802, B60T 810
Patent
active
040883752
ABSTRACT:
A fluid operated system for controlling a brake applicable to a vehicle wheel having a flywheel, driven by an unpowered vehicle wheel, connected to the vehicle brake pedal and adapted to disconnect the flywheel from the unpowered wheel to rotate independent thereof when the brake pedal is operated. Upon vehicle deceleration, the flywheel slides forward in the direction of vehicle movement due to inertia and slidably presses against a brake pad which decelerates the flywheel at a rate proportional to vehicle deceleration. A fluid operated valve having a housing containing spaced fluid inlet, storage and outlet chambers which open onto a concave base of the housing is employed to sense the rotational speed of the flywheel. A collar, connected to the flywheel so as to rotate in unison therewith, slidably engages the concave base and contains a slot which alternately connects the inlet and storage chambers and thereafter, the storage and outlet chambers together to generate a fluid output signal in the outlet chamber which is a function of the rotational speed of the flywheel. A wheel speed senser is used to sense the rotational speed of a vehicle wheel to which the brake is applied. A fluid valve, connected to the flywheel speed senser and the wheel speed sensor, generates a brake controlling response in accordance with a difference between the speeds of the wheel and vehicle and is operatively connected to the brake to limit the difference. Additional features include a manual override assembly which insures normal brake operation upon failure of the fluid operated system, and a pendulum arrangement associated with the flywheel to eliminate errors in vehicle speed sensing caused by gravity when the vehicle travels on steep inclines.
REFERENCES:
patent: 2423057 (1947-06-01), Thomas
patent: 3388951 (1968-06-01), Marcellos
patent: 3649083 (1972-03-01), Depenheuer
patent: 3724914 (1973-04-01), Skoyles
patent: 3893535 (1975-07-01), Burckhardt
patent: 3910643 (1975-10-01), Kobashi
Blix Trygve M.
Eisenzopf Reinhard J.
Miller M. L.
Miller Jr. Maurice L.
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