Fluid filtration unit for use in oil well hole drilling operations

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Description

FIG. 1 is a front and top perspective view of a fluid filtration unit for use in oil well hole drilling operations showing my new design;

FIG. 2 is a rear left side and top perspective view thereof;

FIG. 3 is a top plan view thereof; and

FIG. 4 is a rear right side and top perspective view thereof.

The broken-line showing of the wheel assembly in FIGS. 1, 2 and 4 is for illustrative purposes only and forms no part of the claimed design. The partial surface treatment on the bottom platform is understood to cover the entire platform surface.

Referenced Cited
U.S. Patent Documents
D183115 July 1958 Calloway
D279377 June 25, 1985 Kuchar
D282547 February 11, 1986 McCombs
3397784 August 1968 Carr
3618781 November 1971 Brown
3757956 September 1973 Bradel et al.
4033870 July 5, 1977 Parquet et al.
4049548 September 20, 1977 Dickerson
4059123 November 22, 1977 Bartas et al.
Patent History
Patent number: D292215
Type: Grant
Filed: May 14, 1984
Date of Patent: Oct 6, 1987
Inventor: Leslie H. Bergh (Evanston, WY)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Brian N. Vinson
Law Firm: Sheridan, Ross & McIntosh
Application Number: 6/609,634
Classifications
Current U.S. Class: Pump Or Compressor (D15/7)