Processing apparatus which may be selectively set in two positio

Details Processing apparatus which may be selectively set in two positio Processing apparatus which may be selectively set in two positio

1988-11-02

1990-02-20

Howell, Daniel

Gear cutting, milling, or planing

Milling

Cutter spindle or spindle support

408 4, 408130, B23B 4718

Patent

active

049021761

ABSTRACT:
A drive shaft rotated by an electric motor is disposed to penetrate through a main body, and a spindle is concentrically mounted at the distal end of the drive shaft so that the rotational force of the drive shaft moving in an axial direction thereof is transmitted to the spindle. A processing drill head is selectively mounted at the distal end of the spindle that is coupled with a piston which is urged to a first position in an axially forward direction of the spindle by the fluid pressure supplied to a cylinder, for executing a processing work and a retreated position at which a hold mode is set. An abutting member is securely fitted to the outer surface of a piston rod, and a ring-shaped magnetic member is further provided to the outer surface of the piston rod in an axially movable manner, this ring-shaped magnetic member always being urged in the retreating direction. The abutting member abuts the ring-shaped magnetic member when it moves together with the piston rod in the forward direction, thereby moving the ring-shaped magnetic member. When the piston rod moves in the retreating direction, the abutting member stops at a second position where it abuts a fixed shockabsorbing member.

REFERENCES:
patent: 2114389 (1938-04-01), Kingsbury
patent: 3277748 (1966-10-01), Bechtol
patent: 4371297 (1983-02-01), Hirose

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