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:
Oct. 26, 1982
Filed:
Dec. 26, 1979
Applicant:
Inventor:
Wallace F Magers, Leawood, KS (US);
Assignee:
Realex Corporation, Kansas City, MO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ; F04B / ; G01F / ;
U.S. Cl.
CPC ...
417552 ; 222321 ; 222383 ;
Abstract
The hand-operated pump has a piston which is reciprocated within the hollow pump body by a plunger which itself is reciprocated through an opening in a collar at one end of the pump body. When the plunger is in a fully extended condition at one end of a stroke, a direct seal is obtained between an annular projection on the plunger and an annular groove on the collar which receives said projection. Thus, leakage is prevented along the interface between the plunger and the collar through the opening during shipment or accidental inversion of the pump at other times.