Blast head for an abrasive cleaning machine

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Description

FIG. 1 is a front elevational view of a blast head for an abrasive cleaning machine showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D314257 January 29, 1991 Hoover
1763397 June 1930 Hutchinson
3660943 May 1972 Barnthouse
3691689 September 1972 Goff
4052820 October 11, 1977 Bergh
4336671 June 29, 1982 Nelson
4376358 March 15, 1983 Shelton
4377922 March 29, 1983 Bergh
4382352 May 10, 1983 Nelson
4406092 September 1983 Lake et al.
4416092 November 22, 1983 Nelson
4433511 February 28, 1984 Swain
4646481 March 3, 1987 Dickson
4693041 September 15, 1987 Dickson
4753052 June 28, 1988 Dickson
4894959 January 23, 1990 Hoover
5142831 September 1, 1992 Nelson
5181348 January 26, 1993 Roemmele et al.
5205084 April 27, 1993 Roberts
5231805 August 3, 1993 Sander
Patent History
Patent number: D349790
Type: Grant
Filed: Sep 2, 1992
Date of Patent: Aug 16, 1994
Inventor: Robert E. Hoover (Toledo, OH)
Primary Examiner: Ruth McInroy
Law Firm: Howard & Howard
Application Number: 7/939,627