Title:
IMPACT DRILL
Document Type and Number:
Japanese Patent JPS528904
Kind Code:
A
Abstract:
A percussion drill in which a piston or ram is driven against the end of a drill rod comprises a tube extending through the piston and reaching into a bore at the end of the drill rod to deliver a fluid thereto for moving debris formed by the drilling operation. A socket is received in a bore of the drill rod and has a resilient lip which is deflected inwardly by the flared mouth of the drill rod bore while the tube has a tapered end which is engaged by the wall of a tapered bore formed in the socket.
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Inventors:
ROJIE MONTABERU
Application Number:
JP7908776A
Publication Date:
January 24, 1977
Filing Date:
July 05, 1976
Export Citation:
Assignee:
MONTABERT ROGER
International Classes:
B25D9/00; E21B21/00; B25D9/04; B25D17/00; B25D17/02; B25D17/14; B25D17/16; B25D17/20; B25D17/22; B28D1/14; B28D7/02; E21C37/24; F16J15/00; F16J15/06; F16K41/14; F16L37/02; B25D; E21B; E21C; (IPC1-7): B25D9/00; E21C3/24
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