Single-piece grate bar key for stokers feeding steam generator furnaces

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Description

FIG. 1 is a plan view of one form of the invention.

FIG. 2 is a front view of the embodiment of FIG. 1.

FIG. 3 is a bottom view of the embodiment of FIG. 1.

FIG. 4 is a left side view of the embodiment of FIG. 1.

FIG. 5 is a right side view of the embodiment of FIG. 1; and,

FIG. 6 is a sectional view taken along the line 6--6 of FIG. 3.

Referenced Cited
U.S. Patent Documents
D269806 July 19, 1983 Syme
D390949 February 17, 1998 Fong et al.
D391633 March 3, 1998 Fong et al.
D391634 March 3, 1998 Fong et al.
5282741 February 1, 1994 Massaro et al.
5497711 March 12, 1996 Bobbitt
5575642 November 19, 1996 Willis et al.
Patent History
Patent number: D414859
Type: Grant
Filed: Nov 27, 1998
Date of Patent: Oct 5, 1999
Inventors: Mark R. Hapgood (Tolland, CT), Jeffrey S. Mann (Broad Brook, CT), Ivan Semyanko (East Granby, CT)
Primary Examiner: Mitchell Siegel
Attorney: Arthur E. Fournier, Jr.
Application Number: 0/97,053
Classifications
Current U.S. Class: Element Or Attachment, Not Elsewhere Specified (D23/386)
International Classification: 2399;