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:
Mar. 03, 2009
Filed:
Dec. 08, 2003
Shigeru Murata, Tokyo, JP;
Shigeru Murata, Tokyo, JP;
Yamada Corporation, Tokyo, JP;
Abstract
A reciprocating fluid transfer pump in which a pilot valve assembly block can be mounted to a main body block in a simple, easy and reliable manner. In the reciprocating fluid transfer pump, a fluid, which has been suctioned into a fluid delivering chamber (), is discharged therefrom by causing an expanding and contracting action of a barrier membrane () which is attached to either end of a center rod (). The center rod is capable of reciprocating with respect to the main body block (). A peripheral portion of the barrier membrane () is clamped fixedly to the main body block () via a main ring (), and a pilot valve assembly block () having an integrated pilot valve () for detecting the reciprocating motion of the center rod () is pressed against and thus fixedly secured to the main ring () via a sub ring ().