Title:
DRILLING APPARATUS
United States Patent 3529679
US Patent References:
Rotary drilling apparatus
- - 2856155

Pile-driving attachments
- - 3035646

Derricks
- - 3312291

POSITIONABLE CONTROL ASSEMBLY
- - 3431983


Inventors:
Leven, Samuel
Publication Date:
09/22/1970
View Patent Images:
Download PDF 3529679 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
INGERSOLL RAND CO
Primary Class:
173/28
Other Classes:
173/192
International Classes:
E21B15/04; E21B15/00; E21C11/02




<- Previous Patent (MOUNTING FOR BULLDOZ...)   |   Next Patent (ROCK DRILL WITH RING...) ->