Patent · US Active

Pneumatic vane motor with improved sealing

US8215934B2 · kind B2 · utility

1Cited by

10References

5Claims

0Family size

Assignee

Atlas Copco Tools AB · SE

Inventors

Sven Olov Roger Edlund · Rua Fernandes Moreira, SE
Heino Elmessaar · Lidingö, SE
Johan Lindgren · Lund, SE
Hans Reinhold Svedman · Boo, SE

Key dates

Filing date	Oct 16, 2007
Grant date	Jul 10, 2012
Priority date	—
Expiry date	Oct 22, 2029

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01C19/125
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.