Patent ID: 7942613
Filing Date: 2011-05-17
Classification: E04G

Abstract:
1. An injection pistol for injecting a sealing product formed by a mixture of a first solution and a second solutions through an injection hole, comprising: a tubular injection system which is supplied with said first and second solutions under pressure, wherein the tubular injection system comprises: a dual action actuator adapted to control the displacement of the first and second tubes relative to the protective tube between a first rest position in which the expansible sleeve and the frusto-conical part can be introduced into the injection hole, and an expanded position in which the frusto-conical part is retracted proximally to expand the expansible sleeve against an inner wall of the injection hole for delivery of the first and second solutions to the injection hole without any backflow; wherein a compressed air supply delivers compressed air to a space formed between the protective tube and the second tube up to the frusto-conical part for cleaning the frusto-conical part.