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:
Feb. 05, 2013
Filed:
Jun. 28, 2010
Applicant:
Tetsunari Ochiai, Togane, JP;
Inventor:
Tetsunari Ochiai, Togane, JP;
Assignee:
Maruyama Mfg. Co., Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 49/00 (2006.01); F04B 39/10 (2006.01); F04B 53/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A reciprocating pump is provided that does not leak working liquid to the exterior. A communicating tubeextends over both a first manifoldand a second manifoldsuch that a reciprocating memberconstitutes a part of a reciprocating cylinder. An auxiliary O-ringis disposed on connection surfacesandof a first manifoldand a second manifoldoutside of the communicating tubein the radial direction so that liquid leaking from at least one of a first O-ringbetween the first manifoldand the periphery of the communicating tubeand a second O-ringbetween the second manifoldand the periphery of the communicating tubetoward the exterior is blocked.