Machine chuck
AssigneeAdvanced Diagnostic Development Pty Ltd.
InventorArnoldus P. Van Mullekom
Life of this patent
Estimating the term…
Abstract
A machine chuck (10) having a base (13) to be rotated about a longitudinal axis. Jaw members (20) move relative to the base (13) and radially with respect to the axis. A scroll member (18) is mounted on the base for angular movement relative thereto, which scroll member (18) engages the jaws (20) to cause the radial movement thereof. The base (13) has an annular passage which receives pistons (17) attached to the scroll member 18. Fluid under pressure delivered to the passage (16) causes angular movement of the pistons (17) and therefore scroll member (18) relative to the base (13). This angular movement causes radial movement of the jaw members (20).
Claims6
A machine chuck comprising:
- a base to support a workpiece relative to a longitudinal axis of the chuck;
- a scroll member mounted on the base for angular movement relative thereto about said axis;
- a piston attached to said scroll member;
- a plurality of jaw members mounted on the base to engage the workpiece, the jaw members being movable relative to the base in a direction generally radial of said axis, each jaw member being engaged with said scroll member so that angular movement between the scroll member and the base causes radial movement of the jaw members;
- and wherein
- said base provides an arcuate passage extending angularly about said axis, which passage receives said piston so that a fluid under pressure delivered to said passage causes angular movement of said scroll member to radially move the jaw members.
Dependencies are inferred from the claim text.