Extensible indicator post for valve assemblies

Details Extensible indicator post for valve assemblies Extensible indicator post for valve assemblies

1992-04-20

1993-06-22

Chambers, A. Michael

Fluid handling

With indicator, register, recorder, alarm or inspection means

Position or extent of motion indicator

137369, 137370, 116277, F16K 3700

Patent

active

052209423

ABSTRACT:
An indicator post for indicating an open or closed condition of a valve in a piping system has a post which has a rotatable operating nut at the top of a post head. The post head is attached on its lower end to an upper barrel having a telescoping lower barrel within it. The operating nut is also attached to a solid upper stem. A hollow lower stem surrounds the lower end of the solid stem and has a lower end attached to a valve assembly socket for mating with a valve stem. The hollow stem is freely slidable along a large portion of the solid stem so that the assembly may accommodate a large range of valve stem-to-operating nut distances. The operating nut carries a threaded sleeve which is preferably constructed of molded, engineering-grade plastic.

REFERENCES:
patent: 307753 (1884-11-01), Earle
patent: 407955 (1889-07-01), Kallaher et al.
patent: 1120144 (1914-12-01), Hine
patent: 3452766 (1969-07-01), Fenster
patent: 4448148 (1984-05-01), Gain, Jr.
patent: 4708160 (1987-11-01), Sharp et al.

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