Chucks or sockets – Socket type – Lost motion
Patent
1984-03-21
1986-10-28
Weidenfeld, Gil
Chucks or sockets
Socket type
Lost motion
173133, 279 66, B23B 3104
Patent
active
046194606
ABSTRACT:
A chuck is used with a hammer drill having a drive spindle rotatable about a spindle axis and a hammer displaceable axially in the drive spindle, and with a drill bit having a shaft extending along a shaft axis and having a radially outwardly open and at least generally axially extending groove. The chuck has a generally tubular chuck body centered on a chuck axis and having a central axially extending passage. This body is normally carried on the spindle and receives the shaft of the drill bit in its passage with the spindle, shaft, and chuck axes all coaxial. The hammer projects axially forward into the passage and is engageable therein with the bit. A plurality of jaws radially but not angularly displaceable in the chuck body have inner ends engageable with the drill-bit shaft and in turn provided with formations complementarily engageable in the groove thereof. An actuator is connected to the jaws for moving same radially synchronously and thereby centering the bit in the body by engagement of the inner ends with the shaft and for engaging the formations in the grooves for rotationally linking the body and bit while permitting limited relative axial movement.
REFERENCES:
patent: 1840767 (1932-01-01), Cross
patent: 1873476 (1932-08-01), Procunier
patent: 2089230 (1937-08-01), Thowless
patent: 4519621 (1985-05-01), Okamoto
Dubno Herbert
Howell Daniel W.
Ross Karl F.
Weidenfeld Gil
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