Title: Fire-resisting device for piping extending through a wall

Abstract: The device comprises an annular case having a first portion which projects from the wall and a second portion which is embedded in the wall. A tubular element connected to two pipes of the piping defines a passage through the case. The tubular element has a first section and a second section respectively located in the first portion and second portion of the case. The tubular element is of a material which is rigid at ordinary temperature and softens under the action of heat. At least the first section is of a fusible material having a distinct point of fusion. The first portion of the case is provided with means for instantaneously closing the passage as soon as the first section has disappeared. The second portion of the case is filled with a material which swells radially under the action of heat.

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Inventors: Gaillot, Jean-Paul (Laxou, FR)
Kirch, Bernard P. (Pont-a-Mousson, FR)

Application Number: 827416
Filing Date: 1977-08-24
Publication_date: 1979-01-30
Assignee: Pont-a-Mousson S.A. (Nancy, FR)
Primary Class(es): 137/75 52/1, 52/232, 137/67, 137/360, 137/628, 251/4
Other Classes:
US Patent Ref:

3726050	Apr, 1973	Wise et al.	137/75.
3904111	Sep, 1975	Petersson	137/67.
4072159	Feb, 1978	Kurosawa	137/67.

Other Refs: 184573

Sep, 1966	SU

Primary Examiner: Schwadron, Martin P.
Assistant Examiner: Gerard, Richard
Attorney: Sughrue, Rothwell, Mion, Zinn and Macpeak