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. 28, 1987
Filed:
Mar. 25, 1986
Applicant:
Inventor:
John D Petro, Hubbard, OH (US);
Assignee:
Commercial Shearing, Inc., Youngstown, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F03C / ; F04C / ;
U.S. Cl.
CPC ...
418178 ; 418179 ; 418206 ;
Abstract
A gear pump and motor is provided having increased life and efficiency as a result of improved wiping action of the gear teeth on the inner periphery of the pump chamber. This is accomplished by providing a non-smooth surface layer of a dissimilar metal such as a carbide on the tip ends of the teeth.