Control device for a proportionally adjustable hydraulic...

Details Control device for a proportionally adjustable hydraulic... Control device for a proportionally adjustable hydraulic...

2005-01-04

2005-01-04

Lopez, F. Daniel (Department: 3745)

Power plants

Pressure fluid source and motor

Servo-motor having externally operated control valve sets...

Reexamination Certificate

active

06837046

ABSTRACT:
A control device apparatus for a proportionally adjustable hydraulic pump of a closed hydraulic circuit, including an axial piston pump adjustable from a zero position in two pivoting directions, with an electro hydraulic valve configuration for the activation of a piston of the hydraulic pump from both sides and with a feedback device, connected to the piston and whereby the angular pivoting position of the piston can be fed back to the valve configuration as a control signal, the valve configuration having a valve for each pivoting direction of the piston, and the feedback device comprising two mechanical feeler elements, each connected to one of the valves and in sliding engagement with the piston in such a way that the feeler elements are actuated when it leaves the zero position.

REFERENCES:
patent: 5007805 (1991-04-01), Goade et al.
patent: 5226349 (1993-07-01), Alme et al.
patent: 6283721 (2001-09-01), Gollner

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