Fluid shutoff apparatus

Details Fluid shutoff apparatus Fluid shutoff apparatus

2005-06-21

2005-06-21

Hepperle, Stephen M. (Department: 3753)

Fluid handling

Line condition change responsive valves

Safety cut-off requiring reset

C137S388000, C137S599110

Reexamination Certificate

active

06907898

ABSTRACT:
A fluid shutoff apparatus utilizes a float [121] of a float chamber [115] connected to a float-operated valve [113] to provide positive shutoff of fluid to a downstream load upon excessive flow from the fluid outlet [109] of the apparatus. The float-operated valve is shut when fluid discharge from the apparatus is greater than the flow rate from a flow-limiting valve [103] connected to a fluid inlet [107], decreasing the fluid level in the float chamber. The volume of the float chamber prevents inadvertent shutoff of fluid due to normal perturbations in flow to the load.

REFERENCES:
patent: 1988656 (1935-01-01), Henderson
patent: 3800827 (1974-04-01), Gonsior
patent: 3986482 (1976-10-01), Novak
patent: 4202368 (1980-05-01), Akkerman et al.
patent: 4880030 (1989-11-01), Terry
patent: 4946140 (1990-08-01), Kajihara
patent: 4964421 (1990-10-01), Klaus
patent: 5613513 (1997-03-01), Makowan
patent: 5704389 (1998-01-01), Bouzaglou
patent: 6237618 (2001-05-01), Kushner

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