Patent ID: 9440295
Filing Date: 2016-09-13
CPC Classification: B23B,Y10T

Claim Text:
1. A hydraulic expansion chuck comprising: a main body and; an expanding bush inserted in the main body to form at least one pressure chamber for chucking a tool, wherein the expanding bush has a radial opening and the hydraulic expansion chuck includes only a single driver held radially moveable in the main body and arranged in alignment with the radial opening, wherein the single driver can be moved via the opening into positive engagement with a driving surface on a tool shaft of the tool which is to be received in the expanding bush, wherein the single driver is in the form of a driver screw that can be activated radially outside the hydraulic expansion chuck, which is screwed into the threaded bore formed in the main body in alignment with the radial opening, wherein the driver has a pressure surface and when the driver is in a clamping position, the pressure surface exerts pressure on the driving surface of the tool shaft of the tool, wherein the single driver is the only driver used to axially retain the tool in the expanding bush.