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US 4,070,935 AGranted
Chucking device for a machine tool
AssigneeForkardt, Gefitec
InventorBruno Caprioli
Life of this patent
Estimating the term…
Abstract
A chucking device for a machine tool, especially a turning machine, in which a chuck body has radial recesses in which jaws are slidable while the actuating bars in the chuck body engage teeth on the jaws to move the jaws in and out as the bars reciprocate. A gear coaxial with the chuck body is tangential to the bars and meshes with teeth thereon, while a rotary motor in the chuck body is adjacent to and is directly connected with said gear.
Claims8
In a chucking device, especially for a turning machine, having a chuck body and jaws guided for radial movement on one side of the chuck body;
- a bar longitudinally moveable in the chuck body transversely to the direction of movement of each jaw and each jaw and bar having meshing teeth which effect radial movement of the jaw in response to movement of the bar in the chuck body, a gear on the axis of the chuck in the plane of said bars and to which each bar is tangential, each bar having gear teeth on the side facing the gear and engaging the teeth on the gear, a rotary piston directly coupled to said gear and having radial wings thereon, cavity means in the chuck body having discrete chambers each having a said wing therein, and means for supplying actuating fluid to said chambers on one side of said wings to move said jaws radially inwardly and on the other side of said wings to move said jaws radially outwardly.
Dependencies are inferred from the claim text.