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:
May. 01, 1990
Filed:
Aug. 29, 1989
Applicant:
Inventor:
Atsushi Tada, Meguro-Ku, Tokyo, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137843 ; 137903 ;
Abstract
A check valve comprises a valve body and a plurality of blades--all made of plastics and integral with one another. The blades extend straight in the axial direction of the valve body. The blades undergo elastic deformation when pushed onto a tapered inner surface of a stopper at their free ends, thereby biasing the valve body onto a valve seat.
Tada, Atsushi. (1990). Check valve (U.S. Patent No. 4921017). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4921017
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile