Power assist steering apparatus and method responsive to...

Details Power assist steering apparatus and method responsive to... Power assist steering apparatus and method responsive to...

2008-01-15

2008-01-15

Olson, Lars A. (Department: 3617)

Ships

Steering mechanism

Fluid pressure

C180S417000, C440S06100B

Reexamination Certificate

active

07318386

ABSTRACT:
An apparatus and method for providing power assisted steering for a marine craft having a manually operable steering pump and a hydraulic steering actuator. A powered hydraulic pump is hydraulically connected between the manually operable pump and the actuator. Hydraulic fluid volume output of the steering pump and hydraulic fluid volume output of the powered pump are sensed. The fluid output of the steering pump is compared with the fluid output of the powered pump and the powered pump is operated so that the output of the powered pump is commensurate with output of the steering pump.

REFERENCES:
patent: 2601405 (1952-06-01), Link
patent: 3400537 (1968-09-01), Mercier
patent: 3878763 (1975-04-01), Lang
patent: 3971214 (1976-07-01), Mercier
patent: 6487824 (2002-12-01), West et al.
patent: 6820567 (2004-11-01), Kishi et al.
patent: WO 0119670 (2001-03-01), None
PCT/JP00/04573 International Search Report.

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