Patent ID: 9080584
Filing Date: 2015-07-14
Classification: F15B

Abstract:
1. A pneumatic cylinder comprising a cylinder housing and a cylinder piston which reciprocates within an interior of the cylinder housing, a connection duct for alternately applying working pressure to a respective side of the cylinder piston for causing the cylinder piston to move in one direction of movement of the cylinder piston and for releasing pressure for movement of the cylinder piston in an opposite direction of movement, and a damping arrangement associated with a damping chamber within the interior of the cylinder, the cylinder piston nearing an end stroke position closing the damping chamber from the connection duct, the damping arrangement including a vent path through which pressure from the damping chamber can be vented, a pneumatically controlled control valve connected to the vent path, the pneumatically controlled control valve including a control piston having a control side facing away from the vent path and which is pressurized by pneumatic pressure which exists in a control chamber, wherein the control chamber of the control valve is connected by a duct connection with an area of the damping arrangement that is connected to and disconnected from the duct connection by a closure arrangement including a controlled closure element that is movable to a closed position by pressure in the damping chamber, and wherein increasing pressure in the damping chamber acts on the control piston of the control valve for opening the vent path.