Self-propelled drilling machine

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Description

FIG. 1 is a left side elevational view of a self-propelled drilling machine showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof; and

FIG. 5 is a top plan view thereof.

Referenced Cited
Other references
  • Rock Products, 3/80, p. 7, Drilling Rig. Rock Products, 1/77, p. 71, Drilling Rig. No. 501, top right side of page.
Patent History
Patent number: D267719
Type: Grant
Filed: Jun 13, 1980
Date of Patent: Jan 25, 1983
Inventor: Stanford E. Case (Los Altos Hills, CA)
Primary Examiner: James M. Gandy
Law Firm: Flehr, Hohbach, Test, Albritton & Herbert
Application Number: 6/159,203
Classifications
Current U.S. Class: Drilling, Mining, Or Soil Treatment (includes Element) (D15/21)
International Classification: D1504;