Speed restriction hump

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Description

FIG. 1 is a front perspective view of a speed restriction hump showing our new design, with one end of the speed restriction hump shown detached;

FIG. 2 is a rear perspective view thereof, with both ends of the speed restriction hump shown detached;

FIG. 3 is a bottom perspective view thereof, the detachable ends of the speed restriction hump not shown; and,

FIG. 4 is a perspective view thereof, with both ends of the speed restriction hump shown attached.

Referenced Cited
U.S. Patent Documents
3616111 October 1971 Ralch, Jr.
3663808 May 1972 Baatz
4318079 March 2, 1982 Dickinson
Foreign Patent Documents
2596081 September 1987 FRX
2032983 May 1980 GBX
Other references
  • "Portable Speed Bumps", (Goodyear, 2 pages) dated Mar. 13, 1992. "Avon Speedstoppers", (Avon, 3 pages) dated Mar. 13, 1992. "Pacers Speed Restricting System"(Rocol, 1 page) dated Mar. 13, 1992.
Patent History
Patent number: D336524
Type: Grant
Filed: Aug 2, 1989
Date of Patent: Jun 15, 1993
Inventors: Gary R. White (Bundoora, 3083, Victoria), James M. Polkinghorne (Bundoora, 3083, Victoria)
Primary Examiner: A. Hugo Word
Assistant Examiner: Doris Clark
Law Firm: Fish & Richardson
Application Number: 7/388,972