Pumps – With condition responsive pumped fluid control – Driven pump part speed responsive
Patent
1984-10-04
1986-09-02
Gluck, Richard E.
Pumps
With condition responsive pumped fluid control
Driven pump part speed responsive
180142, 180143, B62D 506, F04B 4900
Patent
active
046093311
ABSTRACT:
A positive displacement pump for a vehicle power steering system comprising a rotor (42) rotatable in and cooperating with a stator (20) to define a pump cavity (52), (54), inlet and outlet ports (56), (58) and (34), (36) communicating with the pump cavity and a flow control valve (96) located in the flow delivery circuit wherein provision is made for opening the flow delivery circuit to a bypass circuit (72) upon an increase in the speed of the vehicle beyond a design point thereby reducing the pump back pressure and power usage which results in increased "road feel" at increased speeds while maintaining normal power assist during steering maneuvers at low speeds.
REFERENCES:
patent: 1847229 (1932-03-01), Swanson et al.
patent: 3314495 (1967-04-01), Clark et al.
patent: 3690400 (1972-09-01), Uchiyama et al.
patent: 3692137 (1972-09-01), Inoue
patent: 4085657 (1978-04-01), Keruagoret
patent: 4199304 (1980-04-01), Strikis et al.
patent: 4244389 (1981-01-01), Shimoura et al.
Ford Motor Company
Gluck Richard E.
Harrington Donald J.
Zerschling Keith L.
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