Apparatus for blocking fluid flow through a conduit

Details Apparatus for blocking fluid flow through a conduit Apparatus for blocking fluid flow through a conduit

1991-01-14

1992-07-21

Bryant, III, James E.

Pipes and tubular conduits

With closures and plugs

Inflatable

138 89, 138 90, F16L 5512

Patent

active

051314339

ABSTRACT:
An apparatus for blocking the flow of fluid through a conduit such as a sewer inlet or the like is provided. The flow-blocking apparatus includes an expandable bladder, a compressed-gas source for supplying compressed gas to effect expansion of the bladder, and a handle device for supporting the compressed-gas source while the bladder is positioned in the conduit to be blocked. The handle device is configured to permit an operator to actuate the flow of compressed gas to the bladder while continuing to support the compressed-gas source. The handle device preferably includes a base portion, a movable portion pivotable relative to the base portion and an actuating member movable in response to pivoting of the movable piston for controlling the flow of compressed gas from the compressed-gas source to the bladder. The apparatus also includes a burst protection plate which deflects compressed gas escaping from the bladder to thereby prevent any injury to an operator.

REFERENCES:
patent: 1906151 (1933-04-01), Goodman
patent: 1946138 (1934-02-01), Gardner
patent: 2843154 (1958-07-01), Hosking
patent: 3724273 (1973-04-01), Awrey
patent: 3870085 (1975-03-01), Schneider
patent: 3890994 (1975-06-01), Olsen
patent: 4021265 (1977-05-01), Guenther
patent: 4329132 (1982-05-01), Melvold et al.
patent: 4390333 (1983-06-01), Dubois
patent: 4550751 (1985-11-01), Shimamura et al.
patent: 4609042 (1986-09-01), Broadus et al.
patent: 4614281 (1986-09-01), Wright

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