Motor vehicles – Steering gear – With fluid power assist
Reexamination Certificate
1999-01-21
2001-05-22
Johnson, Brian L. (Department: 3618)
Motor vehicles
Steering gear
With fluid power assist
C123S446000
Reexamination Certificate
active
06234270
ABSTRACT:
TECHNICAL FIELD
The present invention relates generally to vehicles having both power steering and hydraulic systems, and more specifically to hydraulic and power steering systems driven by a single pump.
BACKGROUND ART
Traditionally, power steering systems installed in vehicles have been powered by a separate power steering pump. For vehicles including both a hydraulic fuel system and a traditional power steering system, multiple engine hydraulic pumps were a necessity. To make engines more compact and reliable, it is desirable to reduce the number of engine pumps.
The present invention is directed to overcoming one or more of the problems set forth above.
SUMMARY OF THE INVENTION
A vehicle comprises a plurality of wheels attached to a vehicle housing. Also attached to the vehicle housing is a power steering system, including a fluid flow circuit, which is operably coupled to a number of the wheels. An internal combustion engine attached to the vehicle housing is connected to a hydraulically actuated system that includes a high pressure pump. An outlet of the high pressure pump is in fluid communication with the fluid flow circuit.
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Bartley Bradley E.
Blass James R.
Gibson Dennis H.
Caterpillar Inc.
Johnson Brian L.
Liell & McNeil
Winner Tony
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