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. 03, 1996
Filed:
Jul. 08, 1994
Kabushiki-Kaisha Motoyama Seisakusho, Miyagi-ken, JP;
Abstract
A manual control valve apparatus having a structure which is provided with, as a conversion mechanism, a diaphragm compressor which is held between a valve casing and a guide member, arcuate engaging grooves formed in a surface of the diaphragm presser opposite to the valve stem, and rolling elements which engage in a freely rolling manner in the engaging grooves and are supported by the lead end part of the valve stem. The bottom surfaces of the engaging grooves are made cam surfaces for causing reciprocating motion in the axial direction of the valve stem. An indicator possessing opening indicating portions indicating the rotational position of the valve stem is attached to the opposite end of the guide member from the valve casing, and furthermore, windows exposing the opening support portions are provided in an area from the circumferential wall of the handle to the end wall thereof. Using this structure, it is possible to compactly incorporate an indicator indicating a degree of valve opening around the handle. Furthermore, the structure of the conversion mechanism is simplified and can be miniaturized, so that it is possible to incorporate the conversion mechanism within the guide member.