Heat retrieval unit

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Description

FIG. 1 is a perspective view of a heat retrieval unit showing my design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevation thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevation thereof;

FIG. 6 is a side elevation taken from the side opposite that illustrated in FIG. 3; and,

FIG. 7 is a rear elevation taken opposite the front elevation of FIG. 5.

Referenced Cited
U.S. Patent Documents
2693941 November 1954 Bystrom
3913663 October 1975 Gates
4028817 June 14, 1977 Winstel
4103735 August 1, 1978 Warner
4206804 June 10, 1980 Scholtes et al.
4219073 August 26, 1980 Talmadge et al.
4276929 July 7, 1981 Howard
Patent History
Patent number: D264500
Type: Grant
Filed: Oct 22, 1979
Date of Patent: May 18, 1982
Inventor: Darrow R. Beaton (Minneapolis, MN)
Primary Examiner: Catherine E. Kemper
Attorney: James R. Cwayna
Application Number: 6/87,552
Classifications
Current U.S. Class: D23/136
International Classification: D2303;