Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent
1994-07-08
1996-09-03
Rivell, John
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
251256, 251263, 251297, 251331, F16K 3700, F16K 31524, F16K 132
Patent
active
055514774
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.
REFERENCES:
patent: 900598 (1908-10-01), Schuermann
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patent: 2669418 (1954-02-01), Brumbaugh
patent: 3363878 (1968-01-01), Smith et al.
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patent: 4477054 (1984-10-01), Dauby et al.
patent: 5108069 (1992-04-01), Tada et al.
Kanno Yohichi
Uchisawa Osamu
Yamazaki Sigekazu
Kabushiki-Kaisha Motoyama Seisakusho
Rivell John
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