Collapsible bollard

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Description

FIG. 1 is a front perspective view of a collapsible bollard showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is a side elevational view thereof.

Referenced Cited
U.S. Patent Documents
D269209 May 31, 1983 Hegartg
282180 July 1883 Erb
289803 December 1883 Bethea
4576508 March 18, 1986 Dickinson
4802432 February 7, 1989 Poldervaart et al.
4917039 April 17, 1990 Siero
Patent History
Patent number: D324920
Type: Grant
Filed: Apr 13, 1989
Date of Patent: Mar 24, 1992
Assignee: Trustees of the University of Pennsylvania (Philadelphia, PA)
Inventors: James M. Miller (Philadelphia, PA), James A. Wargo (Cherry Hill, NJ)
Primary Examiner: A. Hugo Word
Assistant Examiner: Doris Clark
Law Firm: Woodcock Washburn Kurtz Mackiewicz & Norris
Application Number: 7/344,111
Classifications
Current U.S. Class: Post Or Beam (D25/126)