Device for plugging a hollow of a concrete pile

Details Device for plugging a hollow of a concrete pile Device for plugging a hollow of a concrete pile

1975-07-07

1977-06-14

Smith, Robert I.

Pipes and tubular conduits

With closures and plugs

Inflation stem type

F16L 1510

Patent

active

040291286

ABSTRACT:
A plug for a concrete pile having a hollow extending therethrough is in the form of inflatable bag made of impervious material and is secured in a portion of the follow adjacent the top end of the concrete pile in tight engagement with the inner surface thereof when the bag is in inflated position.

REFERENCES:
patent: 3164964 (1965-01-01), Josephson
patent: 3269421 (1966-08-01), Telford et al.
patent: 3669153 (1972-06-01), Weaver
patent: 3831383 (1974-08-01), Crank

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