Mechanical test plug for overflow and waste drains

Description

FIG. 1 is a front view of a mechanical test plug for overflow and waste drains, showing my new design; the back view being a mirror image thereof;

FIG. 2 is a top view thereof;

FIG. 3 is a side view thereof; the opposite side view being a mirror image thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a perspective view thereof and taken from the top and front thereof; and,

FIG. 6 is a perspective view showing the mechanical test plug for overflow and waste drains with respect to the overflow and waste drains of a tub; the dotted lines showing the tub are environmental only and do not form a part of the invention.

Referenced Cited
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D155997 November 1949 Gries
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D274979 August 7, 1984 Hill
D302110 July 11, 1989 Gonzalez
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Foreign Patent Documents
366261 February 1932 GBX
373944 June 1932 GBX
2147079 May 1985 GBX
Patent History
Patent number: D373623
Type: Grant
Filed: Jan 25, 1995
Date of Patent: Sep 10, 1996
Assignee: Cherne Industries Incorporated (Minneapolis, MN)
Inventor: Allen D. Mathison (Richfield, MN)
Primary Examiner: Louis S. Zarfas
Assistant Examiner: Gregory Andoll
Attorney: Anthony G. Eggink
Application Number: 0/34,016