Clutching means adapted for tapping attachment

Details Clutching means adapted for tapping attachment Clutching means adapted for tapping attachment

1987-12-07

1989-05-23

Weidenfeld, Gil

Cutting by use of rotating axially moving tool

Tool or tool-support with torque-applying clutch

10136R, 192 21, 192 51, 408142, F16D 1100

Patent

active

048325422

ABSTRACT:
Clutching device particularly adapted for use in tapping attachments. The clutch is of the type having axial aligned driving and driven elements. The invention is illustrated in a reversible tapping attachment. In a preferred form the driving element is in the form of a sleeve having axial splines. The driven element has axial grooves. A ball retainer with angularly spaced balls provides for drive between the drive element and the driven element, the balls being engageable with the axial splines and with the axial grooves in the driven element. The improvement resides in that the axial grooves are not of the same width as the diameter of the balls but are of a width greater than the diameter of the balls, the width being preferably twice the diameter of the balls. Improved operation is realized in clutching and declutching and in the transfer through a neutral zone from direct drive to reverse drive. In the preferred embodiment the tapping attachment is of the free-axial float type.

REFERENCES:
patent: 3946844 (1976-03-01), Johnson
patent: 3999642 (1976-12-01), Johnson

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