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:
Jan. 25, 1983
Filed:
May. 06, 1981
Applicant:
Inventor:
Robert H Shea, Rochester, NY (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01C / ; F01C / ; F03C / ; F04C / ;
U.S. Cl.
CPC ...
418212 ; 418225 ;
Abstract
A pump or motor has a plurality of spaced drive rollers which rotate in an annular path in a chamber about an axis eccentric to the axis of the chamber. A plurality of free-floating rollers in the chamber are driven through the chamber by the drive rollers to form expanding and contracting areas in the chamber which control the flow of fluid into and out of the chamber. Another free-floating roller or member is centrally located between the drive rollers, and it is concentric with the path of the drive rollers. The centrally located roller is closely adjacent to the drive rollers and forms therewith a fluid seal that prevents any substantial fluid leakage therebetween.