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:
Nov. 16, 1976
Filed:
Mar. 17, 1975
Applicant:
Inventors:
James I Masterman, Owatonna, MN (US);
James C Solie, Owatonna, MN (US);
Jan H Boers, Owatonna, MN (US);
Samuel B McClocklin, Owatonna, MN (US);
Assignee:
Owatonna Tool Company, Owatonna, MN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417206 ;
Abstract
A two-stage pump assembly employs a rotary-type gerotor pump combined with a reciprocating axial piston-type pump both mounted on and driven by a common shaft of a motor. A single key drivingly connects the rotor of the gerotor pump and the angle plate of the axial piston pump to the shaft of the motor for simultaneous operation of the two pumps. A wear sleeve is seated on the shaft of the motor and coacts with an oil seal carried by a common wall between the motor and the gerotor housing to prevent leaking of the fluid being pumped.