Blank duct plug

Details Blank duct plug Blank duct plug

1989-09-19

1990-11-06

Wilson, Neill R.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having separate expander means

Bulged by axially contracting ends

411 55, 138 90, F16B 1304, F16L 5510

Patent

active

049681974

ABSTRACT:
A pipe plug is disclosed which includes a disc-like screw plate, an elastic sealing ring, a horn-like pressure block, and a lifting eye. The screw plate receives the bottom edge of the sealing ring and the horn-like pressure block is mounted on the upper edge. The screw plate has a central rod that extends upwardly through a hole in the pressure block. The lifting eye is then threadedly received on the end of the rod and as the lifting eye is turned, the block and plate will be urged together causing the sealing ring to expand against the internal wall of a pipe.

REFERENCES:
patent: 987145 (1911-03-01), Leisinger
patent: 2542967 (1951-02-01), Waechter
patent: 3457959 (1969-07-01), Cooper
patent: 3704729 (1972-12-01), Tomlinson
patent: 4762151 (1988-08-01), Kinnan

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