Cutting by use of rotating axially moving tool – Processes – Bit detachable
Patent
1993-11-22
1995-03-07
Howell, Daniel W.
Cutting by use of rotating axially moving tool
Processes
Bit detachable
408 56, 408 67, 408 72R, B23B 3500, B23B 4514
Patent
active
053951875
ABSTRACT:
A device for securely clamping a drill motor to a drill plate in order to drill precisely positioned holes in a workpiece includes an annular mandrel and annular collet concentrically disposed about the cutting element. A first end of the collet includes a plurality of longitudinally extending fingers while the mandrel has a tapered end portion having a larger external diameter than the center cylindrical portion of the mandrel. A pneumatically-actuated piston is also coaxially disposed about the cutting element to extend and retract the mandrel and the collet. Once extended, the longitudinally extending fingers of the collet overlie the center cylindrical portion of the mandrel. Thus, the clamping device may be inserted through an aperture defined in a drill plate. Following its retraction, the longitudinally extending fingers of the collet overlie the tapered end of the mandrel and are correspondingly expanded. The expanded fingers hook behind the periphery of the aperture defined in the drill plate and securely clamps the drill motor to the drill plate.
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Layout, NDS Jig Collet Foot, 15 QDA-5150 & 5275, Dwg. No. 4525, Dresser Industries, Inc., Nov. 30, 1984.
Nurlock Catalog, p. 242, Telescoping Bushing Tips.
Blankenship Thomas O.
Fritsche David L.
Slesinski Raymond J.
Howell Daniel W.
McDonnell Douglas Corporation
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