Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent
1996-01-25
1998-09-15
Chambers, A. Michael
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
137553, F16K 3700
Patent
active
058065598
ABSTRACT:
A valve open/closed condition indication apparatus includes a handle base mounted at an upper portion of a bonnet of a valve and having a spiral guide formed on an upper face thereof, and a handle including a handle body disposed on the handle base and an open/closed condition indication plate disposed on the handle body and engaged with and slidably movable in a diametrical direction by the spiral guide of the handle base. When the handle is rotated, a projection of the open/closed condition indication plate of the handle is guided by the spiral guide formed on the handle base so that it is moved in a diametrical direction. When the valve is put into a fully open condition or a fully closed condition by the rotation of the handle, a symbol or color indication marked on the open/close condition indication plate or the handle body and representing the fully open condition or the fully closed condition is indicated accurately in an indication window formed in a name plate or some other suitable member.
REFERENCES:
patent: 4674531 (1987-06-01), Aalto et al.
patent: 5137052 (1992-08-01), Baumcart
patent: 5178187 (1993-01-01), Raymond, Jr. et al.
patent: 5535698 (1996-07-01), Trevisan
Chambers A. Michael
Ihara High Pressure Fittings Co., Ltd.
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