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:
Jul. 10, 2007
Filed:
Aug. 07, 2003
Applicant:
Takeshi Murata, Saitama, JP;
Inventor:
Takeshi Murata, Saitama, JP;
Assignee:
Showa Corporation, Saitama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16F 9/348 (2006.01); F16F 9/512 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a bottom valve apparatus in which a flow passage is formed in a bottom piece, a check valve opening and closing the flow passage is provided in one face side of the bottom piece, and a coil spring urging the check valve is fastened by a bolt and a nut which are provided in the bottom piece, a thread direction of the nut or the bolt fastening the coil spring is set to an opposite direction to a winding direction of the coil spring.