Method of sealing openings in manhole covers using a pick hole p

Details Method of sealing openings in manhole covers using a pick hole p Method of sealing openings in manhole covers using a pick hole p

1991-04-15

1993-07-27

Brittain, James R.

Road structure, process, or apparatus

Pavement

Vault cover-closure

215358, E02D 2914, B65D 3912

Patent

active

052305830

ABSTRACT:
A pick hole plug for sealing an opening in a manhole cover and the process for using such plug. The plug is formed from a soft uncured rubber polymer which has a larger diameter than the hole which it is to seal. The plug is compressed by hand and inserted into the pick hole. The plug deforms to conform to the shape of the sides of the pick hole and cures over a period of time as the heat and sunlight contact it.

REFERENCES:
patent: 781182 (1905-01-01), Brewington
patent: 1014450 (1912-01-01), Carlsson
patent: 3447533 (1964-09-01), Spicer
patent: 4188457 (1980-02-01), Throp
patent: 4597692 (1986-01-01), Gruenwald
patent: 4726469 (1988-02-01), Farber

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