Chucks or sockets – With fluid-pressure actuator – Jaw is expansible chamber; i.e. – bladder type
Patent
1997-11-13
1999-08-31
Howell, Daniel W.
Chucks or sockets
With fluid-pressure actuator
Jaw is expansible chamber; i.e., bladder type
279 405, B23B 3130
Patent
active
059443251
ABSTRACT:
A collet for holding and precisely locating a cutting tool within a tool holder has a bore constructed to receive a shank of the cutting tool therein, a hydrostatically displacable sleeve received in the bore, a piston received within a passage communicating with the sleeve and displaceable to pressurize fluid within the passage to actuate the sleeve and a retaining nut threadably received on the tool holder to displace the piston to pressurize the fluid within the collet as the nut is rotated on the tool holder. The pressurized fluid within the collet acts substantially uniformly across the sleeve to urge the sleeve into firm engagement with the cutting tool to firmly hold and accurately and repeatably locate the cutting tool within the collet. Also, the pressurized fluid acts substantially uniformly on the interior wall of the collet to substantially uniformly urge the collet into firm engagement with the tool holder to firmly hold and accurately and repeatably locate the collet within the tool holder. The hydrostatic force generated to both hold the cutting tool within the collet and to hold the collet within the tool holder is produced by the single action of rotating the retaining nut on the tool holder to displace the piston and pressurize the fluid within the collet.
REFERENCES:
patent: 2318838 (1943-05-01), Conradson
patent: 2744456 (1956-05-01), Atherholt, Sr. et al.
patent: 2797604 (1957-07-01), Atherholt et al.
patent: 3677559 (1972-07-01), Andre et al.
patent: 5249815 (1993-10-01), Beere
patent: 5429376 (1995-07-01), Mueller et al.
patent: 5516243 (1996-05-01), Laube
patent: 5711538 (1998-01-01), Retzbach et al.
Howell Daniel W.
Hydra-Lock Corporation
Tabaddor Rouzbeh
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