Combination filter and ionic gas generator assembly for purifying machine tool coolants


FIG. 1 is a front perspective view of a combination filter and ionic gas generator assembly, showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof; and

FIG. 7 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D76391 September 1928 Groak
D117756 November 1939 Newman
D159225 July 1950 Pick
D187577 March 1960 Smith
D211991 August 1968 de May
D236829 September 1975 Berry, Jr. et al.
3186929 June 1965 Rippie
4214962 July 29, 1980 Pincon
4229389 October 21, 1980 Granger
Patent History
Patent number: D273697
Type: Grant
Filed: May 17, 1982
Date of Patent: May 1, 1984
Inventors: Dennis E. J. Johnson (Aurora, IL), Scott J. Johnson (Aurora, IL)
Primary Examiner: James R. Largen
Law Firm: McWilliams, Mann, Zummer and Sweeney
Application Number: 6/378,891
Current U.S. Class: D23/3