Clutch for positive feed drill

Details Clutch for positive feed drill Clutch for positive feed drill

1987-12-14

1989-01-24

Weidenfeld, Gil

Cutting by use of rotating axially moving tool

Means to drive tool

Including means to move tool along tool-axis

173 19, 173146, 192 56R, 192 89A, 408137, 408139, B23B 4500, F16D 1100

Patent

active

047998334

ABSTRACT:
The invention relates to a torque-limiting clutch for use in combination with a positive feed drill that has a reversible motor and reversible driving means. A preferred use of the clutch is in combination with a drill that has a reversible motor rapid advance system. The clutch provides direct drive in a forward mode and is torque-limiting in a reverse mode so as to protect the gears from breaking due to excessive torque while the gears are turning in reverse during the rapid advance mode. In the reverse mode, the torque-limiting clutch protects the drill bit as it bears on the workpiece and prevents unscrewing of the drilling and mounting components. In a preferred embodiment the clutch is mounted on a shaft and is comprised of two clutch jaws that drive through lugs mounted on the jaws. The lugs provide direct drive in a forward rotation, but are shaped so as to allow the jaws to disengage when the torque is excessive in a reverse rotation.

REFERENCES:
patent: 1762155 (1930-06-01), Buss
patent: 1793221 (1931-02-01), Iversen
patent: 2658396 (1953-11-01), Christiance
patent: 3512434 (1970-05-01), Juhasz et al.
patent: 4418767 (1983-12-01), Vindez
patent: 4538942 (1985-09-01), Vindez
patent: 4591299 (1986-05-01), Eckman
patent: 4592681 (1986-06-01), Pennison
patent: 4612998 (1986-09-01), Vindez

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