Static structures (e.g. – buildings) – Controlled by condition responsive means
Patent
1978-11-15
1981-06-02
Friedman, Carl D.
Static structures (e.g., buildings)
Controlled by condition responsive means
52221, 52232, E04N 900
Patent
active
042703182
ABSTRACT:
A fire resistant fitting for use in sealing a floor hole and including a pair of plates having an expandable material therebetween for securing the fitting in the hole and a fire resistant material suspended in the opening from the lower plate by a simple twistable metal tang.
REFERENCES:
patent: 3911635 (1975-10-01), Traupe
patent: 4061344 (1977-12-01), Bradley et al.
Carroll James C.
Chapman Donald L.
McGoldrick Gilbert A.
Friedman Carl D.
Golden Larry I.
Guttman Richard T.
Lesser Norton
Square D Company
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