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:
Aug. 08, 1978
Filed:
Feb. 03, 1977
Allan E Heinrich, Oconomowoc, WI (US);
Applied Power, Inc., Milwaukee, WI (US);
Abstract
A hydraulic vane-type pump or motor comprising a housing and a stator defining a rotor chamber, and a rotor for rotation in said chamber on a shaft extending axially through said housing. To prevent gouging of the walls of the rotor chamber by the sharp peripheral edges of the rotor, the rotor sidewalls are ground or offset in the area of the peripheral edges to provide sufficient clearance between the rotor sidewalls and the chamber walls. The rotor is offset to a lesser depth beginning at a point radially inwardly from the outer peripheral edge toward the center thereof to minimize excessive oil leakage normally associated with rotors which are milled to prevent gouging.