Gear cutting – milling – or planing – Milling – Cutter spindle or spindle support
Patent
1985-07-12
1986-08-05
Weidenfeld, Gil
Gear cutting, milling, or planing
Milling
Cutter spindle or spindle support
279 37, 279 57, 408239R, B23C 526
Patent
active
046040099
ABSTRACT:
A tool retention mechanism is disclosed for clamping a tool holder knob. An elongate rod member is supported lengthwise in a compartment formed within the center of an elongate housing. A knob clamping assembly is mounted on the outer end of the rod member and is constructed of a circular array of claw fingers that are spring biased to urge them to move radially inward. A first piston is slideably supported on the actuator rod rearwardly of the claw fingers and has a cylindrical collar portion which slides over the claw fingers to retain them in a knob clamping position. A second piston is secured to the inner end portion of the actuator rod and slideably supported in the compartment to define a closed chamber with the inner closed end of the compartment. A first set of belleville spring washers is mounted on the actuator rod between the first and second pistons to bias the first piston to the knob holding position, and a second set of belleville washers is coaxially disposed relative to the first set of belleville washers between an annular shoulder formed in the compartment and the second piston to effect a large force on the actuator rod in a direction towards the closed end of the compartment. A fluid control means is provided for selectively driving the second piston a slight distance to overcome the force exerted by the outer set of belleville washers and to simultaneously drive the first piston inwardly of the compartment and move the cylindrical collar portion inwardly of the claw fingers to free them to open.
REFERENCES:
patent: 3168322 (1965-02-01), Dziedzic
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patent: 4011791 (1977-03-01), Lanzenberger
patent: 4063488 (1977-12-01), Kagerer
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patent: 4303360 (1981-12-01), Cayen et al.
patent: 4411568 (1983-10-01), Rohm
patent: 4560310 (1985-12-01), Eckstein et al.
Buckman T. W.
Illinois Tool Works Inc.
O'Brien J. P.
Webb Glenn L.
Weidenfeld Gil
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