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. 03, 1990
Filed:
Jan. 26, 1989
George A Thompson, Daytona Beach, FL (US);
Other;
Abstract
A rotary pump having an eccentric rotor disposed in a cylindrical housing is provided with a pair of cylindrical roller pistons disposed in opposed recesses in the rotor for rolling engagement with the internal surface of the housing. A pair of bearing rings having radially inwardly projecting ribs are located at opposite ends of the housing with the ribs disposed in engagement with complimentary grooves formed in the external surface of the rotor and in the external surfaces of each roller to positively locate the rollers within the recesses. A plurality of bearing support members are provided having semi-circular cradle portions engaging the grooves in the rollers and parallel leg portions extending through parallel bores in the housing. Interconnecting rods are provided between the legs of opposed bearing support members to maintain the rollers in positive engagement with the internal surface of the housing at all times.