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. 20, 2010
Filed:
Nov. 22, 2005
Tomoyoshi Kobayashi, Toyota, JP;
Norio Yamagishi, Nishikamo-gun, JP;
Tomoyoshi Kobayashi, Toyota, JP;
Norio Yamagishi, Nishikamo-gun, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A valve in which durability of a sealing member made from an elastic material can be increased and sealing capability can be advantageously maintained over a wide range from a large differential pressure to a low differential pressure. A valve (), in which a valve disc () and a valve seat () are brought into close contact via a sealing member () composed of an elastic material and provided at the valve disc () or valve seat (), comprises a throttle section () defined by the shape of at least one of the valve disc () and valve seat (). The throttle section () narrows a flow passage formed between the valve disc () and valve seat () and is provided near the sealing member (). The flow passage narrowed by the throttle section () is so set that narrowing preferentially proceeds in the flow passage in close proximity to the sealing member () during the closing operation of the valve disc ().