Abstract: A coupling for connecting a compressed air source to an air motor, having a housing with a housing channel leading to a compressed air connection and a piston axially adjustable in the housing channel- and force-loaded by a spring element having a piston channel which, when the coupling is connected to the air motor, merges into a connecting channel present in a pin element of the air motor. The piston is adjustable in the direction of the compressed air connection by the pin element against the force applied by the spring element. The spring element runs between the compressed air connection and the compressed air connection side area of the piston. Radial openings extend from the compressed air connection side area of the piston channel. An exhaust air channel connected to the air motor extends in the wall of the housing.

Abstract: The invention relates to a coupling (110) for connecting a compressed air source to an air motor, comprising a housing (116) with a housing channel leading to a compressed air connection (118) and a piston (124) axially adjustable in the housing channel (122) and force-loaded by a spring element (126) having a piston channel (132) which, when the coupling is connected to the air motor, merges into a connecting channel (138) present in a pin element (140) of the air motor. The piston can be adjusted in the direction of the compressed air connection by means of the pin element against the force applied by the spring element. The spring element (126) runs between the compressed air connection (118) and the compressed air connection side area of the piston (124). Radial openings (34, 36, 134, 136), through which compressed air flows, extend from the compressed air connection side area of the piston channel (132).