Power steering assist

Details Power steering assist Power steering assist

1995-04-17

1997-02-18

Sotelo, Jesus D.

Ships

Steering mechanism

Fluid pressure

440 61, B63H 2522

Patent

active

056032790

ABSTRACT:
A power steering assist system, especially adaptable for a marine vehicle having a propulsion unit pivotal about a steering axis and including a steering member to effect steering movement thereof about the steering axis and an operator actuable steering helm, comprising a hydraulic cylinder, a rotary valve body disposed adjacent the hydraulic cylinder and having a valve control adapted to establish fluid communication between the hydraulic cylinder and a fluid source for supplying hydraulic fluid to the cylinder. A ball screw, operably connected with the valve body, and a ball nut, having a recirculating ball connection with the ball screw, is operably connected to the piston so as to move axially on reciprocal movement of the piston. Pressurized hydraulic fluid is supplied to the cylinder and to either side of the piston to effect reciprocal movement of the piston, whereby axial movement of the ball nut is translated into rotary movement of the ball screw so as to rotate the valve body. An output member is operably connected to the piston and to the steering member.

REFERENCES:
patent: 3913517 (1975-10-01), Lohse et al.
patent: 4592732 (1986-06-01), Ferguson
patent: 4778416 (1988-10-01), Rhoads et al.
patent: 5409076 (1995-04-01), Huber et al.

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