Combined smoke gasket and intumescent expanding seal device for sliding elevator doors and the like

Description

FIG. 1 is a front perspective view, viewed from above, of a combined smoke gasket and intumescent expanding seal device for elevator doors and the like, embodying my new design;

FIG. 2 is a rear perspective view thereof; and

FIG. 3 is a horizontal section view taken along the line 3--3 of FIG. 1. A bottom view of the seal device corresponds substantially to the mirror image of the top thereof seen in FIGS. 1 and 2.

Referenced Cited
U.S. Patent Documents
3964214 June 22, 1976 Wendt
4045930 September 6, 1977 Dixon
4144688 March 20, 1979 Dixon
4307543 December 29, 1981 Schulthess
4376354 March 15, 1983 Passovoy
Patent History
Patent number: D279409
Type: Grant
Filed: Nov 23, 1982
Date of Patent: Jun 25, 1985
Inventor: George A. Allen, Jr. (Midlothian, VA)
Primary Examiner: A. Hugo Word
Law Firm: Mason, Fenwick & Lawrence
Application Number: 6/444,687
Classifications
Current U.S. Class: D25/74