Door operator

Description

FIG. 1 is a side elevational view of a door operator, showing my new design, the opposite side being a mirror image thereof;

FIG. 2 is a top plan view thereof;

FIG. 3 is an enlarged end elevational view, the opposite end being a mirror image thereof; and,

FIG. 4 is a bottom plan view.

Referenced Cited
U.S. Patent Documents
1043492 November 1912 Werner et al.
1172561 February 1916 Rowntree
1263628 April 1918 Vallen
1796660 March 1931 Morse
2525683 October 1950 Keely
2746540 May 1956 Dixon
2905463 September 1959 Broden
2952312 September 1960 Young et al.
3207500 September 1965 Kooy
3321003 May 1967 Boerner
3658112 April 1972 Iwaizumi
3809144 May 1974 Garufo
3872622 March 1975 Berk
Other references
  • Belanger Cloth Car Wash Systems Brochure D6-SM-1-81. Photographs of Prior Art Door.
Patent History
Patent number: D336523
Type: Grant
Filed: Nov 15, 1991
Date of Patent: Jun 15, 1993
Inventor: Donald E. Deroia (Shaker Heights, OH)
Primary Examiner: A. Hugo Word
Assistant Examiner: Doris V. Cole
Law Firm: Robert R. Hussey Co.
Application Number: 7/795,239
Classifications
Current U.S. Class: D25/49