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US 4,504,070 AGranted
Anti-centrifugal chuck
AssigneeSpeedgrip Chuck, Inc.
InventorGerald W. Norton
Life of this patent
Estimating the term…
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AssigneeSpeedgrip Chuck, Inc.
InventorGerald W. Norton
Estimating the term…
An anti-centrifugal power chuck of the type having a plurality of radially-movable jaws and respective wedge-like actuators associated therewith for the purpose of displacing the jaws into engagement with a workpiece for holding same as the chuck is rotated at high speeds is designed to resist the centrifugal forces which are applied at high rotational speeds to a significantly greater degree than has been previously obtainable and which will reduce problems of binding and wear associated with the use of wedge-type actuators, without compromising strength. In accordance with a preferred embodiment, a single, massive, unitary body member is utilized for both radially-movably supporting and guiding a plurality of gripping jaws and for receiving, within complementarily-shaped bores, the respective wedge-like actuators, which actuators and the actuation system therefor have been modified to operate under compression instead of tension for external gripping of workpieces. Additionally, the wedge members and their respective bores are formed of a substantially circular cylindrical shape for radially and circumferentially distributing circumferential forces imposed on the jaws to the unitary body member.
An anti-centrifugal chuck for exteriorly gripping workpieces while rotating at high speeds, comprising:
In a rotatable jaw chuck construction of the type having a body means formed of an inner sleeve-like body and an outer sleeve-like body, a plurality of jaw assemblies radially slideably supported in said inner sleeve-like body for gripping a workpiece, and axially-movable actuating wedges, each of which is axially slideably supported by the outer sleeve-like body and is in slideable camming engagement with a respective jaw assembly for causing radial displacement thereof in response to axial displacement of said wedge, the improvement wherein said inner sleeve-like body and said outer sleeve-like body are formed as a single, unitary body member, said wedge members being received in respective complementarily-shaped bores formed in said body member, and said wedge members are operable to radially inwardly displace said jaws into engagement with a workpiece under compression, said outer sleeve-like body including backing portions disposed radially outwardly of the wedge members to provide backing forces resisting centrifugally induced radial outward movement of the respective jaw assemblies during high speed rotation of the chuck construction, said backing portions being of sufficient axial length to fully support the respective wedge members at their axially forward positions.
Dependencies are inferred from the claim text.