Fiberglass, reinforced concrete hose shut-off valve

Details Fiberglass, reinforced concrete hose shut-off valve Fiberglass, reinforced concrete hose shut-off valve

2005-03-29

2005-03-29

Look, Edward K. (Department: 3751)

Valves and valve actuation

Tube compressors

Fluid pressure actuated

C137S557000

Reexamination Certificate

active

06871832

ABSTRACT:
A shut off valve for use with a concrete delivery hose includes a single flexible cylindrical sleeve disposed within a one piece, continuous rigid casing that surrounds the hose. A gas chamber is defined between the sleeve and the casing so that when pressurized gas is forced into the chamber, the sleeve will be displaced radially inwardly to constrict the hose and stop the flow of concrete. The shut-off valve also includes a relief valve for quickly exhausting gas from the valve, and an off/on indicator for indicating open/closed positions of the valve.

REFERENCES:
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patent: 3397860 (1968-08-01), Bushmeyer
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patent: 4899783 (1990-02-01), Yusko et al.
patent: 5131423 (1992-07-01), Shaw
patent: 5836395 (1998-11-01), Budde
patent: 6102361 (2000-08-01), Riikonen
patent: 0008999 (1980-03-01), None
patent: 1325994 (2003-07-01), None
patent: 0620173 (1949-03-01), None
patent: 2023210 (1979-12-01), None

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