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. 24, 1991
Filed:
Dec. 11, 1989
Tokyo Keiko Co., Ltd., Tokyo, JP;
Abstract
In a relief valve of the type including a main valve unit incorporating a main valve member (poppet) adapted for engagement with a cylindrical member and a pilot valve unit for controlling a fluid pressure whereby an inlet port of the main valve unit is communicated with a control chamber of the pilot valve unit by an internal pilot passage through a choke formed in a seat member of the pilot valve unit, the choke is formed with an expanded portion having a closed end and through holes for directly communicating the expanded portion with the internal pilot passage and/or the cylindrical member is composed of a unitary-construction member formed with a plurality of flow paths communicated with one another.