501 Joseph Vogele Ag

Dieter Synatschke

Paul Sattelberger

Werner Saam

A lubricant supply limiting device (1') for a lubrication system, wherein at least one fixed throttle (F) and a servo pressure controller (3) provided with a variable throttle (D) are disposed in the flow path, and wherein an adjustment member (6') for the variable throttle (D) is subjected to the resilient action of an actuator, is provided with a proportional solenoid (15) acting as the actuator for selectively adjusting the lubricant flow to the demand at specified lubrication points. A proportional solenoid (15) is moreover advantageous for general use in servo pressure controllers to act on the adjustment member thereof in a manner permitting the pressure differential maintained by the servo pressure controller and determined by a fixed throttle to be varied. In a lubrication system, a supply limiting device controlled by a proportional solenoid (15) is included in a control circuit in which a current control device (52) is operable to vary the current supply to the proportional solenoid (15) in response to demand at specified lubrication points. Alternatively the supply limiting device including the proportional solenoid may be incorporated in a closed control circuit in which the current supply to the proportional solenoid (15) is automatically controlled by means of a current control device (61) in accordance with the actual lubricant flow and a reference value related to specified lubrication points.

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Mannheim, Germany

Dieter Synatschke