Machine spindle having a gas spring-operated tool-clamping...

Details Machine spindle having a gas spring-operated tool-clamping... Machine spindle having a gas spring-operated tool-clamping...

2006-03-07

2006-03-07

Ashley, Boyer D. (Department: 3722)

Gear cutting, milling, or planing

Milling

Cutter spindle or spindle support

C409S136000, C408S23900A

Reexamination Certificate

active

07008153

ABSTRACT:
A machine spindle includes a casing and a clamping mechanism disposed in the casing. The clamping mechanism includes front and rear drawbars which are relatively movable axially within the casing. A gas spring biases the rear drawbar rearwardly, and a force transmitting mechanism transmits such rearward motion to the front drawbar for moving the front drawbar rearwardly. In response to its rearward movement, the front drawbar actuates a clamp for clamping a tool. The gas spring includes a housing disposed in the casing and defining a gas chamber having a front wall through which the rear drawbar extends. The gas spring also includes a piston disposed in the gas chamber for axial movement therein. The piston is releasably connected to a rear end of the rear drawbar by a releasable coupling disposed in the chamber.

REFERENCES:
patent: 4668137 (1987-05-01), Iwakura
patent: 4863324 (1989-09-01), Blessing
patent: 4915553 (1990-04-01), Lazarevic
patent: 5052866 (1991-10-01), Bauch et al.
patent: 5192061 (1993-03-01), Schaublin et al.
patent: 5251887 (1993-10-01), Arnold et al.
patent: 6722827 (2004-04-01), Anderson

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