Heat-shrinkable electrofusion fittings and methods

Details Heat-shrinkable electrofusion fittings and methods Heat-shrinkable electrofusion fittings and methods

1997-12-26

1999-11-23

Nicholson, Eric K.

Pipe joints or couplings

With assembly means or feature

Molded joint facilitator

285 212, 2853815, F16L 4702

Patent

active

059886897

ABSTRACT:
The present invention provides improved heat-shrinkable electrofusion fittings and methods. The fittings are basically comprised of an electrically heatable tubular plastic outer member which is shrinkable when heated to a transition temperature, an electrically heatable tubular plastic inner member positioned within the outer member which has a fusion temperature higher than the transition temperature and an electrically activated induction coil for energizing the inner and outer members.

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