Patent ID: 8215934
Filing Date: 2012-07-10
Classification: F01C

Abstract:
1. Pneumatic vane motor, comprising: a stator with a cylinder, an inlet connectable to a pressure air source and an outlet connectable to an exhaust passage, a rotor journalled relative to the cylinder and having an extension protruding from the stator and forming an output shaft, and a seal system arranged between the output shaft and the stator, wherein the seal system comprises: a clearance seal formed between the stator and the output shaft at a point close to the cylinder, at least one elastic annular seal element carried by the stator and engaging the output shaft at a point outside and at an axial distance from said clearance seal, and a low pressure chamber formed between said clearance seal and said at least one elastic annular seal element, wherein said low pressure chamber communicates with the exhaust passage.