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:
Jun. 03, 2003
Filed:
Apr. 24, 2001
Richard K. Gardner, Montpelier, OH (US);
Ingersoll-Rand Company, Woodcliff Lake, NJ (US);
Abstract
A pneumatic motor having a motor body having a main piston chamber with opposed first and second chamber ends, at least two spool chambers in fluid communication with the main piston chamber, an inlet for flowing a pressurized fluid into each of the at least two spool chambers, and an outlet provided in the housing for exhausting the pressurized fluid from the main piston chamber and each of the spool chambers. At least two spool members are in the two spool chambers, with each spool member adapted to be movable in a first direction to permit pressurized fluid to be supplied to the main piston chamber and also in a second direction to permit the pressurized fluid to be exhausted from the main piston chamber. A piston member is movable in a reciprocating manner in the main piston chamber in response to movement by the spool members. The piston has first and second piston ends and an annular piston chamber located between and in fluid communication with the first and second chamber ends, the first and second piston ends defining, with the first and second chamber ends, a first chamber and a second chamber, respectively, in the main piston chamber during reciprocation of the piston. First and second seals between the piston ends and the annular piston chamber are provided such that while the piston reciprocates within the main piston chamber, the first and second seals alternately exhaust the first and second chambers into the annular piston chamber.