Piston or similar article

- Caterpillar Inc.
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Description

FIG. 1 is a front elevational view of a piston or similar article showing our new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and

FIG. 7 is a bottom perspective thereof.

Referenced Cited
U.S. Patent Documents
2296478 September 1942 Morgan
2308178 January 1943 Kishline
2407429 September 1946 Kuttner
3971355 July 27, 1976 Kottmann
4056044 November 1, 1977 Kamman et al.
4180027 December 25, 1979 Taylor
4207808 June 17, 1980 Elsbett et al.
4242948 January 6, 1981 Stang et al.
4286505 September 1, 1981 Amdall
4377967 March 29, 1983 Pelizzoni
4577595 March 25, 1986 Deutschmann et al.
4644853 February 24, 1987 Russell et al.
4662047 May 5, 1987 Berchem
4704950 November 10, 1987 Ripberger et al.
Foreign Patent Documents
0106935 May 1984 EPX
54-47937 April 1979 JPX
Other references
  • Technical Paper No. 770031; Society of Automotive Engineers, dtd. Feb. 28-Mar. 4, 1977, by M. D. Roehrle.
Patent History
Patent number: D322969
Type: Grant
Filed: Oct 21, 1988
Date of Patent: Jan 7, 1992
Assignee: Caterpillar Inc. (Peoria, IL)
Inventors: Benny Ballheimer (Peoria, IL), Kenton L. Erickson (Dunlap, IL), James A. Green (Peoria, IL), Stephen G. Shoup (Peoria, IL)
Primary Examiner: A. Hugo Word
Assistant Examiner: R. T. Seifert
Attorney: Kenneth A. Rhoads
Application Number: 7/261,643