Screw plug mounting for an electric immersion heater

Skip to: Description  ·  References Cited  · Patent History  ·  Patent History
Description

FIG. 1 is a perspective view of a screw plug mounting for an electric immersion heater, showing our new design;

FIG. 2 is a top plan view of said mounting, and

FIG. 3 is a sectional view corresponding to the line 3--3 of FIG. 2.

Referenced Cited
U.S. Patent Documents
1279651 September 1918 Campbell
1569881 January 1926 Reid
3138173 June 1964 Hartman
Patent History
Patent number: D243510
Type: Grant
Filed: Mar 22, 1976
Date of Patent: Mar 1, 1977
Inventors: Robert D. Shirey (Pittsburgh, PA), Joseph L. Lohman (Pittsburgh, PA)
Primary Examiner: William N. Wertman
Attorney: Michael Williams
Application Number: 5/669,153
Classifications
Current U.S. Class: D23/90
International Classification: D0808;