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. 13, 1993
Filed:
Jul. 22, 1991
Thomas B Martin, Vancouver, WA (US);
Other;
Abstract
The subject invention is directed to a vane-type pump which includes a pump housing having interior surfaces defining a pumping chamber having a diameccentric configuration. A diameccentric configuration is defined for purposes of this invention as a substantially circular shaped body whose constant diameter rotates about a point which is offset with respect to the centroid of that shaped body. The diameccentrically configured pumping chamber includes a perimeter section, a front wall, a rear wall, an intake port, a discharge port, an intake region, and a discharge region. A pump rotor is disposed within and is diameccentric to the pumping chamber for rotation within the pumping chamber for pressurizing and pumping a fluid. The pumping chamber, which typically has a generally elliptical shape, has a substantially uniform diameter when measured through the longitudinal center of the rotor. The perimeter of the pumping chamber in the discharge region has a shape such that fluid is discharged through the discharge port in a substantially uniform, non-pulsating flow.