Adjustable air inlet manifold for combined fireplace grate and heating unit

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Description

FIG. 1 is a perspective view of an adjustable air inlet manifold, showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a front elevational view;

FIG. 4 is a rear elevational view;

FIG. 5 is a bottom plan view, and

FIG. 6 is an end elevational view thereof.

The broken line representation of a combined fire place grate and heating unit in FIG. 1 is for purposes of illustration only.

Referenced Cited
U.S. Patent Documents
D77935 March 1929 Carlson
D228728 October 1973 Bergstrom
D240536 July 1976 Christophel
D242543 November 1976 Betenbaugh, Jr.
1747259 February 1930 Pierce
3452737 July 1969 Pellegrino et al.
3469570 September 1969 Wright
3901212 August 1975 Stites
3938496 February 17, 1976 Kampf et al.
Patent History
Patent number: D247947
Type: Grant
Filed: Nov 10, 1976
Date of Patent: May 23, 1978
Assignee: Production Experts, Inc. (Cleveland, OH)
Inventor: Stanley Darwin Noll (Shaker Heights, OH)
Primary Examiner: James R. Largen
Attorney: William Isler
Application Number: 5/740,438
Classifications
Current U.S. Class: D23/94
International Classification: D2303;