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US 9,358,675 B2Granted
Lubricating pump with double-acting drive piston
AssigneeWilly Vogel AG
InventorsPaul Sattelberger, Werner Saam
Life of this patent
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AssigneeWilly Vogel AG
InventorsPaul Sattelberger, Werner Saam
Estimating the term…
The invention relates to an automatic lubricating pump (1) for a machine having a hydraulically actuated striking tool (4), such as a hydraulic hammer for example. The lubricating pump (1) is designed such that it can be connected to a pressure line (P) of the hydraulic circuit (2). The lubricating pump (1) has a drive piston (8), 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 (9), 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 (8) is designed to be double-acting with two drive chambers (8c, 8d) and a hydraulically operable changeover member (16) is provided which can be engaged in the hydraulic circuit and by means of which the drive chambers (8c, 8d) can be alternately and automatically connected to the pressure line (8) during operation.
A device comprising:
The device according to any one of the preceding claims, further comprising:
A method comprising lubricating at least one lubricating point on a machine comprising a hydraulic circuit, including moving a drive piston by a repeatedly rising and dropping hydraulic pressure or a constant hydraulic pressure in a pressure line of the hydraulic circuit and transferring the movement of the drive piston to a feed piston coupled to the drive piston, said piston feeding lubricant in the direction of the at least one lubricating point, wherein two drive chambers of the drive piston are alternately connected to the pressure line and the drive piston executes a to-and-fro movement.
Dependencies are inferred from the claim text.