Manhole cover

- Morrison Bros. Company
Skip to: Description  ·  References Cited  · Patent History  ·  Patent History
Description

FIG. 1 is a perspective view of the manhole cover;

FIG. 2 is a top plan view of the manhole cover; the bottom plan view is identical except that its handle assembly is diametrically disposed in relation to the assembly shown in FIG. 2;

FIG. 3 is a side elevational view of the manhole cover;

FIG. 4 is a cross sectional view taken along line 4--4 of FIG. 1; and,

FIG. 5 is an enlarged fragmentary top plan view showing in detail a portion of the surface ornamentation.

The article is intended for use as a reversible manhole cover of identical appearance from both its top and bottom sides.

Referenced Cited
U.S. Patent Documents
166574 August 1875 Wilbur
3289556 December 1966 Russell
3618275 November 1971 Ance
4662777 May 5, 1987 Newton
5123776 June 23, 1992 Lang et al.
5378078 January 3, 1995 Lewis et al.
5470172 November 28, 1995 Wiedrich
5529431 June 25, 1996 Walsh
Patent History
Patent number: D428658
Type: Grant
Filed: Oct 6, 1999
Date of Patent: Jul 25, 2000
Assignee: Morrison Bros. Company (Dubuque, IA)
Inventors: Charles D. Glab (Dubuque, IA), Michael D. Lattner (Dubuque, IA), Adam J. Koehler (Dubuque, IA)
Primary Examiner: Doris Clark
Law Firm: Tilton, Fallon, Lungmus
Application Number: 0/111,947
Classifications
Current U.S. Class: Underground Service Vault (4) (D25/36)
International Classification: 2502;