Mobile rotary drill rig
Schmidt , et al. November 27, 1
U.S. patent number D253,535 [Application Number 05/760,453] was granted by the patent office on 1979-11-27 for mobile rotary drill rig. This patent grant is currently assigned to Chicago Pneumatic Tool Co.. Invention is credited to Jay R. Cory, Walter A. Schmidt, Jack D. Smith.
| United States Patent | D253,535 |
| Schmidt , et al. | November 27, 1979 |
Mobile rotary drill rig
Claims
The ornamental design for a mobile rotary drill rig, as shown and described.
| Inventors: | Schmidt; Walter A. (Enid, OK), Smith; Jack D. (Enid, OK), Cory; Jay R. (Enid, OK) |
|---|---|
| Assignee: | Chicago Pneumatic Tool Co. (New
York, NY) |
| Appl. No.: | 05/760,453 |
| Filed: | January 19, 1977 |
| Current U.S. Class: | D15/21 |
| Current International Class: | D1504 |
| Field of Search: | ;D15/21 ;173/22-28 ;175/52 |
References Cited [Referenced By]
U.S. Patent Documents
| D244190 | May 1970 | Swartz et al. |
Other References
|
Drilling, 1/76, P64, Drill Rig, center left side of page.. |
Primary Examiner: Gandy; James M.
Attorney, Agent or Firm: Rudy; Stephen J.
Description
FIG. 1 is a right front perspective view of a mobile rotary drill rig showing our new design;
FIG. 2 is a left rear perspective view thereof; and
FIG. 3 is a top plan view thereof.
The broken lines showing of the engine in FIGS. 1 and 2 of the drawing, is for illustrative purposes only.
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