The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 10, 2012
Filed:
Oct. 16, 2007
Sven Olov Roger Edlund, Östersund, SE;
Heino Elmessaar, Lidingö, SE;
Johan Fredrik Lindgren, Stockholm, SE;
Hans Reinhold Svedman, Saltsjö-Boo, SE;
Sven Olov Roger Edlund, Östersund, SE;
Heino Elmessaar, Lidingö, SE;
Johan Fredrik Lindgren, Stockholm, SE;
Hans Reinhold Svedman, Saltsjö-Boo, SE;
Atlas Copco Tools AB, Nacka, SE;
Abstract
A pneumatic vane motor includes a stator with a cylinder, an inlet connectable to a pressure air source and an outlet connectable to an exhaust passage, a rotor journalled in the stator, and an output shaft. The stator has a front opening forming a clearance seal relative to the output shaft and an annular front cover with at least one elastic annular seal element encircling the output shaft at a distance from the clearance seal, wherein a low pressure chamber is formed between the clearance seal and the seal element or elements and communicates with the exhaust passage.