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:
Jun. 18, 2019
Filed:
May. 10, 2017
Applicant:
Tgk Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
TGK CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K 1/22 (2006.01); F16K 1/226 (2006.01); F16K 31/04 (2006.01); F16K 11/052 (2006.01); B60H 1/00 (2006.01);
U.S. Cl.
CPC ...
F16K 1/2261 (2013.01); B60H 1/00485 (2013.01); F16K 1/222 (2013.01); F16K 11/052 (2013.01); F16K 11/0525 (2013.01); F16K 31/04 (2013.01);
Abstract
A butterfly valve includes a valve element that turns with a shaft to control open/closed states of a passage or adjust an opening degree of the passage. The valve element includes a plate and an elastic member provided along an outer circumference of the plate. The elastic member has seal parts that touch and leave an inner surface of the passage to close and open the passage. The plate has specific shapes on both sides with respect to an axis of the shaft, the specific shapes narrowing gaps between the plate and the inner surface on lower-pressure sides of seal centers of the seal parts in a valve closed state.