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:
Mar. 21, 1989
Filed:
Mar. 20, 1987
Ichiro Ishiwata, Yokosuka, JP;
Keiji Nakagawa, Yokosuka, JP;
Nippon Air Brake Co., Ltd., Kobe, JP;
Abstract
A fluid pressure control valve includes a housing having an inner hole and a plunger movably disposed in the inner hole, the housing having inlet and non-pressure chambers defined herein at one end of the plunger and an outlet chamber defined therein at the opposite end of the plunger, the housing also having a passage communicating the outlet chamber with the inlet chamber. A valve device is disposed in the passage and openable and closable in response to movement of the plunger. A preloading spring is disposed in the housing for normally urging the plunger in a direction to open the valve device. The housing comprises a cylindrical member having one open end and a cover member closing the open end. A spring seat is disposed in the cylindrical member in engagement with the cover member, the preloading spring acting between the spring seat and the plunger. The spring seat is force-fitted in the inner hole of the housing or in the cover member.