Fluid controller and logic control system for use therewith

Details Fluid controller and logic control system for use therewith Fluid controller and logic control system for use therewith

1991-05-20

1992-05-26

Michalsky, Gerald A.

Power plants

Pressure fluid source and motor

Expansible chamber type volumetric responsive measuring...

91 31, 91358R, 91467, 180142, F15B 909

Patent

active

051156407

ABSTRACT:
An improved fluid controller (15) is provided having both rotary valving (47) actuated by the steering wheel (17), and axial valving (49) controlled by an electro-hydraulic valve (113) in response to a correction signal (31). In one embodiment, both the rotary valving and the axial valving are achieved by a primary valve member (63) and a follow-up valve member (65), and both the rotary and axial valving can be actuated simultaneously. Also disclosed is a logic control system for closed-loop control of the electro-hydraulic valve, whereby performance problems such as self-steering wander, drift, and others are substantially eliminated.

REFERENCES:
patent: Re25126 (1962-02-01), Charlson
patent: 2833253 (1958-05-01), Wittren
patent: 3385057 (1968-05-01), Pruvot et al.
patent: 3584538 (1971-06-01), Peterson
patent: 3937601 (1976-02-01), Miller
patent: 4033377 (1977-07-01), Johnson
patent: 4237773 (1980-12-01), Liebert et al.
patent: 4838375 (1989-06-01), Nagai
patent: 4955445 (1990-09-01), Kauss
patent: 5020618 (1991-06-01), Nagao

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