Screw plug mounting for an electric immersion heater
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
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;
International Classification: D0808;