Patent ID: 6619164
Filing Date: 2003-09-16
Classification: B23B,B23Q,Y10T

Abstract:
In a clamshell machining lathe having two semi-circular segments where each semi-circular segment comprises a stationary member adapted to be secured to a cylindrical work piece to be machined and a movable member journaled for rotation on the stationary member and the movable member having spur gear teeth on an outer periphery thereof where the semi-circular segments each have first and second ends, the improvement comprising:(a) a first hinge assembly joining the stationary members at the first end having: (i) a first hinge member having an attachment plate adapted to be secured to the stationary member of the first semi-circular segment, an obliquely extending arm on the attachment plate, said arm having an aperture formed therethrough; (ii) a second hinge member having an attachment plate adapted to be secured to the stationary member of the second semi-circular segment and an obliquely extending arm projecting from the attachment plate of the second hinge member and a threaded bore formed in the arm thereof; (iii) a bolt passing through the aperture formed through the arm of the first hinge member into the threaded bore of the second hinge member; (b) a second hinge assembly joining the movable members at the first ends thereof; (c) means for releasable clamping the stationary and movable members to one another at their respective second ends thereof.