Motor vehicles – Including one or more ski-like or runner members – With at least one surface-engaging propulsion element
Patent
1976-08-13
1977-09-06
Blix, Trygve M.
Motor vehicles
Including one or more ski-like or runner members
With at least one surface-engaging propulsion element
303 93, 303116, 303119, B60T 802
Patent
active
040462145
ABSTRACT:
A modulating pump is disclosed including a pumping member that is initially operable by a solenoid device in a relatively long full-stroke condition to effect rapid pressure build-up of the fluid supplied to a load, the pumping member being subsequently operated by the solenoid device in a relatively short stroke condition to effect further pressure build-up in the load. A main spring device normally biases the armature of the main solenoid device to achieve the full-stroke operating condition, and when the pressure of the load reaches a value to cause the return force of the main spring to be overcome, a resilient abutment device becomes operable to achieve the desired short stroke pumping condition. A self commutating pump device is also disclosed. The modulating pump device is included in a vehicle traction control system, as, for example, an anti-skid traction control system for automatically braking an overrunning driven wheel relative to another driven wheel connected thereto by a differential mechanism.
REFERENCES:
patent: 3288232 (1966-11-01), Shepherd
patent: 3771839 (1973-11-01), Fink
patent: 3847449 (1974-11-01), Adahan
patent: 3901559 (1975-08-01), Inada
Aspro, Inc.
Blix Trygve M.
Butler Douglas C.
Laubscher Lawrence E.
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