Beam counterweight for jack pumps

- Cook Machine Company
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Description

FIG. 1 is a front elevational view of a beam counterweight for jack pumps showing my new design.

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof.

Referenced Cited
U.S. Patent Documents
1986012 January 1935 Patterson
2074550 March 1937 Humphrey
3221569 December 1965 Ross
Other references
  • National Supply Co. Bulletin #300-7/41-Weights on Jack Pump on cover. Composite Cat. of Oil Field & Pipeline Equip., 17th, 1950 Edition-vol. 1, p. 2529-Weights on Jack Pumps at top & bottom.
Patent History
Patent number: D267404
Type: Grant
Filed: Oct 14, 1980
Date of Patent: Dec 28, 1982
Assignee: Cook Machine Company (Duncan, OK)
Inventor: Gregory D. Cook (Duncan, OK)
Primary Examiner: Nelson C. Holtje
Law Firm: Dunlap & Codding
Application Number: 6/196,323
Classifications
Current U.S. Class: Pump Or Compressor (D15/7)
International Classification: D1502;