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:
Sep. 23, 2003
Filed:
May. 25, 2001
Takeo Kushida, Saitama Prefecture, JP;
Etsuro Hozumi, Saitama Prefecture, JP;
Akinori Yamazaki, Saitama Prefecture, JP;
Kazumasa Kasahara, Saitama Prefecture, JP;
Hideya Kikuchi, Saitama Prefecture, JP;
Abstract
The present invention provides a pressure relief valve, which achieves a reliable sealed structure in a valve holder without the valve holder jutting far out from a common rail, assures stability of operation of a valve spring in a valve holder and is capable of being manufactured at low cost and can be made compact. A first invention relates to a pressure relief valve, which focuses on making the low-pressure portion side end portion of a valve holder a closed structure, and which has a valve spring that is housed inside the valve holder spring seats on which a valve spring is seated; a valve seat that is mounted to the valve holder and a valve body which is lifted from the valve seat by fluid pressure, this pressure relief valve being characterized in that there is formed a closed end portion which makes the low-pressure portion side end portion B of the valve holder a closed state, and, in addition, is constituted so as to enable a valve spring to be seated between the inner wall surface of closed end portion and a spring seat A second invention focuses on making the spring seats of valve spring a cup shape, and is characterized in that spring seats are housed in a slidable condition inside a valve holder as cup-shaped spring seats