Blow plug

Details Blow plug Blow plug

1988-02-01

1989-06-20

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Method or apparatus for placement of conductive wire

By fluid pressure differential in conduit

B65H 5900

Patent

active

048403520

ABSTRACT:
A blow plug for closing the end of the conduit to seal the conduit so that a pulling plug can be propelled by compressed air through the conduit to pull a lead line through the plug and into the conduit. The plug comprises a split sleeve that is expanded by a wedge into engagement with the inner surface of the conduit to mechanically lock the plug in the entry end of the conduit. The larger end of the wedge has a resilient sealing member associated therewith which is compressed by the same mechanism employed to force the wedge into the sleeve. Compression of the sealing member causes the periphery of that member to expand into sealing engagement with the inner surface of the conduit. The plug has provisions for feeding the lead line therethrough into the conduit and provisions for introducing air into the conduit through the plug.

REFERENCES:
patent: 423134 (1890-03-01), Cope
patent: 2767676 (1956-10-01), Johnson et al.
patent: 3301531 (1967-01-01), Corsiglia
patent: 3793732 (1974-02-01), Hamuck
patent: 4382581 (1983-05-01), Wimer et al.
FPL Qualtec, Inc. Brochure, "ATCC Cable Pulling System".

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