VARMEAKTIVERBART, TETTENDE STEMPEL.

摘要

A heat activatable sealing piston comprising a cylinder of polymeric material (2) radially expandable on application of heat. The piston can be incorporated into thermal actuators of various types. In a preferred embodiment, the sealing piston is used in an electrical connector (4), together with a gas generating means (6) to force solder (8) between an electrical conductor (10) inserted into the connector and the walls of the tubular connector (4).