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:
Apr. 11, 2006
Filed:
May. 07, 2003
Applicant:
Richard Gardner, Montpelier, OH (US);
Inventor:
Richard Gardner, Montpelier, OH (US);
Assignee:
Ingersoll-Rand Company, Woodcliff, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01L 15/18 (2006.01); F04B 17/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A pump comprising a valve housing and a spool slidably positioned within the valve housing. The spool has a supply face, a first end face, and a second end face, and is slidable between a first position wherein pressurized supply air is supplied to the supply face and the first end face, the first end face having a greater surface area than the supply face, a second position wherein the supply air is supplied to the supply face and is blocked from both the first and second end faces, and a third position wherein the supply air is supplied to the supply face and the second end face.