Plug for pier hole

Details Plug for pier hole Plug for pier hole

1989-01-18

1990-03-27

Taylor, Dennis L.

Hydraulic and earth engineering

Miscellaneous

405133, 405150, 405232, E02D 500

Patent

active

049115863

ABSTRACT:
An inflatable, stretchable plug for obstructing a hole drilled in the ground for a foundation pier comprises a sturdy elastic envelope having an air valve mounted in the wall thereof for connection with outside supply of pressurized air and a handle bonded to upper portion of the envelope for easy removal of the plug from the hole before concrete mixture is poured in to produce the pier.

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patent: 4660644 (1987-04-01), Egnor
patent: 4671518 (1987-06-01), Retz

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