Sight glass

- AC & R
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Description

FIG. 1 is a front perspective view of a sight glass showing my invention;

FIG. 2 is a side elevational view;

FIG. 3 is an additional side elevational view thereof;

FIG. 4 is a top plan view; and,

FIG. 5 is a bottom plan view.

Referenced Cited
U.S. Patent Documents
1485772 March 1924 Du Pont
1501504 July 1924 Truax
3020795 February 1962 McKinney et al.
3345872 October 1967 McGinnis
3438540 April 1969 Le Roy
3936196 February 3, 1976 Wickersheim
4162826 July 31, 1979 Van der Belk et al.
4468095 August 28, 1984 Meginnis
4803876 February 14, 1989 Haynes
Patent History
Patent number: D334940
Type: Grant
Filed: Jul 19, 1990
Date of Patent: Apr 20, 1993
Assignee: AC & R (Chatham, IL)
Inventor: Robert Wolinsky (Springfield, IL)
Primary Examiner: A. Hugo Word
Assistant Examiner: Paula Mortimer
Law Firm: Lockwood, Alex, FitzGibbon & Cummings
Application Number: 7/555,746
Classifications
Current U.S. Class: Lens Or Objective (D16/134)