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Primary Examiner: Rothberg, Samuel B.
Assistant Examiner:
Attorney: Stevens, Davis, Miller & Mosher

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Title: Fire seal

Abstract: A Fire seal is formed in three layers, an elastic inner tube which is inflatable, a resilient fire resistant felt surrounding the tube, and a wear resistant rubber impregnated outer layer.


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Inventors: Smith, Stanley (Wotton-under-Edge, EN)

Application Number: 504918
Filing Date: 1974-09-11
Publication_date: 1976-01-27
Assignee: Rolls-Royce (1971) Limited (London, EN)
Primary Class(es): 277/646 277/651, 277/652, 277/936
Other Classes:
US Patent Ref:
2832618Apr, 1958Knoll et al.277/34.
3642291Feb, 1972Zeffer et al.277/34.
3719366Mar, 1973Pippert277/233.

Other Refs: 502,643
Mar, 1939UK
Other References: "Graphite Cloth," Chemical Engineering, May 4, 1959, p. 70.