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:
Sep. 25, 1990
Filed:
Sep. 27, 1989
Applicant:
Inventor:
Frank L Harwath, Rockford, IL (US);
Assignee:
Suntec Industries Incorporated, Rockford, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04C / ; F16B / ;
U.S. Cl.
CPC ...
418171 ; 403354 ; 403356 ;
Abstract
A two-stage gear pump with two gear sets each having a spur gear telescoped onto a slotted drive shaft with a press fit and also positively keyed to the shaft. An annular groove is formed around the shaft adjacent the closed end of the slot in the shaft and enables the slot to be relatively short in axial length so as to reduce manufacturing problems and to enhance the press fit between the shaft and the first stage spur gear.