Title:
Hole cleaning device
United States Patent 2937619


Inventors:
Kurt, Ewald H.
Application Number:
US63957157A
Publication Date:
05/24/1960
Filing Date:
02/11/1957
Assignee:
INGERSOLL RAND CO
Primary Class:
Other Classes:
91/281, 91/325, 173/67, 173/73, 173/138, 173/211, 175/92, 175/296
International Classes:
E21B4/14
View Patent Images:
US Patent References:
2837317Hole cleaning device1958-06-03
2810549Fluid actuated percussive tool1957-10-22
1637792Automatic lathe1927-08-02
1518124Apparatus for drilling holes1924-12-02
0816090N/A1906-03-27
Foreign References:
GB191424109A1915-08-19