Automatically-actuated safety device with a double-seated...

Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface

Reexamination Certificate

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Details

C137S601130, C137S601200, C137S843000

Reexamination Certificate

active

06962165

ABSTRACT:
A safety device for insertion into a pipeline (K) in which fluid circulates in an upstream (X−) and a downstream (X+) direction, comprises a tube (1) that provides the fluid with a central circulatory passage (CC) regulated by a central valve (3) that closes in the event of an excessive flow of this fluid. There is an annular valve closure member (4) which is elastically malleable, mounted to the external periphery of the tube (1), and provides the fluid with a peripheral circulatory passage which it selectively obstructs by subjecting a radial expansion in the event of an excessive flow of fluid.

REFERENCES:
patent: 2583384 (1952-01-01), Mercier
patent: 2802486 (1957-08-01), Frey
patent: 2926690 (1960-03-01), Martin
patent: 3703913 (1972-11-01), Carsten
patent: 4856552 (1989-08-01), Hiemstra
patent: 5293898 (1994-03-01), Masloff
patent: 5697351 (1997-12-01), Schumacher
patent: 6062264 (2000-05-01), Dickson
patent: 6443180 (2002-09-01), Samuelson et al.
patent: 1 059 481 (2000-12-01), None
patent: 2002 156061 (2002-09-01), None

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