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. 11, 2003
Filed:
Dec. 05, 2001
Applicant:
Inventor:
Kazumasa Yamada, Tokyo, JP;
Assignee:
Yamada Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 3/502 ;
U.S. Cl.
CPC ...
F04B 3/502 ;
Abstract
A restarting device of a pump including a center rod defining fluid delivering chambers and driving chambers and . The restarting device of the pump further includes: a change-over valve for switching a direction for the center rod to move, and a restarting hydraulic circuit which, when a supply of the driving fluid from the change-over valve to the driving chambers and in both sides is stopped, detects the supply of the driving fluid into the driving chambers and in both sides having been stopped and then causes the driving fluid to flow into the change-over valve, thereby restarting the supply of the driving fluid into the driving chambers and