Combined fireplace front and heat exchange grate

- Thermograte, Inc.
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Description

FIG. 1 is a perspective view of a combined fireplace front and heat exchange grate showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a front elevational view of a modified form of the combined fireplace front and heat exchange grate shown in FIG. 1;

FIG. 7 is a left side elevational view of FIG. 6;

FIG. 8 is a right side elevational view of FIG. 6;

FIG. 9 is a top plan view of FIG. 6; and

FIG. 10 is a bottom plan view of FIG. 6.

Referenced Cited
U.S. Patent Documents
D228728 October 1973 Bergstrom
D240536 July 1976 Christophol
2743720 May 1956 Dollinger
2789554 April 1957 Dupler
3452737 July 1969 Pellegrino et al.
3901212 August 1975 Stites
3938496 February 17, 1976 Kampf et al.
Other references
  • Dual Action Fireplace Furnace sold by Stone Castle, Inc., 6160-90th Ave., S.E., Mercer Island, Washington, 98040. "Elegance 1" by General Products Corp. Inc., 150 Ardale St., West Haven, Conn. 06516.
Patent History
Patent number: D247973
Type: Grant
Filed: Feb 3, 1977
Date of Patent: May 23, 1978
Assignee: Thermograte, Inc.
Inventor: Theodore R. Bergstrom (St. Paul, MN)
Primary Examiner: James R. Largen
Attorney: Norman P. Friederichs
Application Number: 5/765,410
Classifications
Current U.S. Class: D23/94; D/7207
International Classification: D2303; D0708;