Importance

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Abstract

The invention relates to a reciprocating piston motor. The motor comprises at least one cylinder which is closed on at least one end, a piston which is slidable in the cylinder and forms a pressure chamber with the closed end of the cylinder, a power transmission element such as a piston rod coupled to the piston and extending outside the cylinder. The reciprocating piston motor likewise comprises a first valve member which is received in the piston and which in its open position mutually connects the cylinder spaces on either side of the piston, a second valve member which is received in the piston and which in its open position connects a pressure medium passage formed in the piston to a cylinder space on one side of the piston, a resilient member urging the piston in the direction of the closed cylinder end, actuating means which are connected to the valve members and embodied such that on contact with a stop in the pressure chamber the first valve member is closed and the second is opened and on contact with a stop on the opposite end of the cylinder vice versa.

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First Claim