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:
Aug. 08, 1978
Filed:
Jun. 30, 1977
Applicant:
Inventor:
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 ; 417269 ;
Abstract
A two-stage pump having a low and high pressure stages having a casing with a pair of pumps positioned therein, with one pump being a low pressure stage unit and the other pump being a high pressure stage unit. Each of the pumps has a fluid inlet and a fluid outlet with the outlet of the low stage pump being in fluid flow relation with an outlet port from the casing and also the fluid inlet of the high stage pump. The low stage pump is supplied with fluid through internal flow passages in the casing and associated structure including a flow passage through a rotatable element of the high stage pump.