Propane fired heater for defrosting frozen pipes or the like

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Description

FIG. 1 is a top, front, and left side perspective view of a propane fired heater for defrosting frozen pipes or the like, showing our new design;

FIG. 2 is a top plan view thereof on a reduced scale;

FIG. 3 is a left side elevation view thereof on a reduced scale;

FIG. 4 is a front elevation view thereof on a reduced scale;

FIG. 5 is a right side elevation view thereof on a reduced scale;

FIG. 6 is a rear elevation view thereof on a reduced scale; and

FIG. 7 is a bottom plan view thereof on a reduced scale.

Referenced Cited
U.S. Patent Documents
3189727 June 1965 Jepson et al.
3692977 September 1972 Duhamel et al.
4511787 April 16, 1985 Sibert
Other references
  • Grainger's Wholesale Net Price Cat., Spring 1986, p. 1178 A Propane Convection Heater No. 2E427, right lower side of page.
Patent History
Patent number: D315597
Type: Grant
Filed: Sep 21, 1988
Date of Patent: Mar 19, 1991
Inventors: Del Botheras (Sundre, Alberta), Wayne C. Colenutt (Sundre, Alberta)
Primary Examiner: James M. Gandy
Assistant Examiner: Lisa Lichtenstein
Law Firm: Davis, Bujold & Streck
Application Number: 7/247,305
Classifications
Current U.S. Class: Portable (D23/332)