Ships – Steering mechanism – Fluid pressure
Reexamination Certificate
2008-01-15
2008-01-15
Olson, Lars A. (Department: 3617)
Ships
Steering mechanism
Fluid pressure
C180S417000, C440S06100B
Reexamination Certificate
active
10507833
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.
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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.
Dudra Brian James
Wong Tat Lung Ray
Wood Neal Wesley Denis
Baker & Hostetler LLP
Olson Lars A.
Teleflex Canada Incorporated
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