Aktiebolaget Skf

Willy Vogel Ag

501 Joseph Vogele Ag

Skf Lubrication Systems Germany Ag

Paul Sattelberger

Werner Saam

Jürgen Kreutzkämper

Jürgen Kreutzkaemper

Dieter Synatschke

Stefan Schürmann

The invention relates to an automatic lubricating pump () for a machine having a hydraulically actuated striking tool (), such as a hydraulic hammer for example. The lubricating pump () is designed such that it can be connected to a pressure line (P) of the hydraulic circuit (). The lubricating pump () has a drive piston (), designed such that it can be driven by the hydraulic circuit, and a feed piston, connected to the drive piston in a motion-transmitting manner, of a feed pump (), by means of which lubricant is fed to a lubricating point. The service life of the lubricating pump can be prolonged compared with conventional pumps if the drive piston () is designed to be double-acting with two drive chambers () and a hydraulically operable changeover member () is provided which can be engaged in the hydraulic circuit and by means of which the drive chambers () can be alternately and automatically connected to the pressure line () during operation.

Lubricating pump with double-acting drive piston

A pump for conveying a medium comprises a pump chamber having an intake opening and an outlet opening. A movable component is movably disposed in the pump chamber in order to convey a batch of the medium, which is located in the pump chamber, from the intake opening to the outlet opening. A ventilation device has a ventilation opening in fluid communication with the pump chamber. The ventilation opening is different from the intake opening and the outlet opening. The ventilation device is configured to reduce or at least substantially prevent, at least temporarily, the formation of a partial vacuum or a negative pressure in the pump chamber.

Pump for conveying a medium and lubricating system containing the same

A lubricant supply device comprises a tank configured to hold a lubricant. At least one movable piston unit is disposed in the holding tank and at least partially defines a lubricant chamber. The lubricant chamber has at least two openings, of which one is a lubricant inlet and the other is a lubricant outlet. A first one of the openings is disposed in the movable piston unit.

Lubricant supply device and method for operating a lubricant supply device

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.

Growing community of inventors

Reilingen, Germany

Paul Sattelberger