Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent
1995-09-21
1997-11-11
Rivell, John
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
137559, 200 6186, F16K 3700
Patent
active
056853360
ABSTRACT:
Device for monitoring the valve lift of a pneumatically or hydraulically driven valve, the valve body of which is actuated by a pressure spindle (16), specificelly a diaphragm valve where a drive spindle (20) and pressure spindle (16) are effectively connected. Two trip cams (38, 40) separated by the distance (a) are mounted on the drive spindle (20) to activate two limit switches (34,35) that act as position indicators for the two valve positions, whereby one trip cam (38, 40) is assigned to one limit switch (34, 35). The automatic positioning of the trip cams (38, 40) during the initial actuation of the valve is accomplished by a crossbar (36) that acts as a driver and is located between trip cams (38, 40). The trip cams (38,40) are mounted on drive spindle (20) by moveable clamps.
REFERENCES:
patent: 2973009 (1961-02-01), Kazyaka
patent: 3189700 (1965-06-01), Eidson
patent: 3367365 (1968-02-01), Stevens
patent: 3390943 (1968-07-01), Myers
patent: 3416566 (1968-12-01), Anderson
patent: 3789875 (1974-02-01), McGee
patent: 3949963 (1976-04-01), Aoki
patent: 4353390 (1982-10-01), Karpenko
patent: 4858937 (1989-08-01), Fairlie-Clarke et al.
Georg Fischer Rohrleitungssysteme AG
Rivell John
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