Abstract: A rotatable chuck for supporting a plastic coated workpiece in a power driven threading machine is disclosed comprising workpiece engaging jaws mounted on the machine spindle for rotation therewith and for pivotal movement relative thereto radially inwardly and outwardly of the spindle axis. Each jaw pivotally supports an insert holder provided with a pair of inserts for engaging the outer surface of the workpiece. Each of the insert holders pivotally supports a centering link associated with an adjacent jaw so as to be actuated in response to pivotal displacement of the jaws radially inwardly of the spindle axis to control the attitude of the insert holders so that the inserts are directed radially inwardly of the spindle axis to assure a uniform gripping action by the two inserts of each holder upon engagement with the workpiece. The centering links also displace the workpiece to a centered position coaxial with the spindle axis during inward displacement of the jaws.

Abstract: A rotatable chuck workpiece for a power driven threading machine is disclosed comprising a tubular spindle having front and rear ends and front and rear workpiece engaging jaws respectively at the front and rear ends. Each front jaw is connected to a corresponding rear jaw by a rod to which the jaws are rigidly attached, and the rods are mounted on the exterior of the spindle for rotation therewith and for pivotal movement relative thereto. A drive plate at the front end of the spindle is mounted coaxially thereon for pivotal movement relative to the spindle and is provided with drive pins interengaging with slots in the front jaws, whereby pivotal movement of the drive plate in opposite directions imparts pivotal movement of the front jaws radially inwardly and outwardly of the spindle axis.

Abstract: A transmission is disclosed for rotating the work supporting chuck assembly of a power driven threading machine at low and high speeds. The transmission includes a sun gear, a ring gear coaxial with the sun gear and axially shiftable between first and second positions relative to the sun gear and to a fixed clutch component, and a plurality of planet gears between the sun gear and ring gear. The sun gear is motor driven to provide the transmission input, and the planet gears are connected to and drive an output sprocket wheel drivingly connected to the chuck assembly. The first position of the ring gear provides clutched interengagement thereof with the sun gear for rotation therewith, whereby the planet gears rotate therewith to rotate the output sprocket wheel at a first speed equal to the speed of rotation of the sun gear.

Abstract: A reaming tool is mountable on the tooling carriage of a power driven threading machine for continuous motion displacement about two axes and between use and storage positions in which a reaming blade of the tool is respectively coaxial with a tubular workpiece to be reamed and supported laterally outwardly adjacent the tooling carriage. The reaming tool is comprised of an elongate arm carrying the reaming blade, and one end of the arm is mounted on the tooling carriage for pivotal movement of the arm about a first axis laterally offset and parallel to the workpiece axis and a second axis perpendicular to the first axis.

Abstract: A base for supporting a rotatable spindle shaft and chuck assembly of a motor driven threading machine for rotation about a spindle axis is comprised of axially spaced apart upright support members transverse to the spindle axis and rigidly interconnected by means of a torque tube having opposite ends welded thereto. The spindle shaft, which carries chuck units on opposite ends thereof, extends through the torque tube and is rotatably supported by bearings adjacent the upright support members. A pair of support rails extend through openings therefor in the support members and have ends extending radially outwardly from one of the support members to provide a cantilever support arrangement for the tooling carriage of the threading machine. Additionally, the support members, portions of the support rails therebetween, and the torque tube facilitate the mounting of drive motor and gear box units for the machine.

Abstract: A fluid control valve has a cylindrical body member with inlet and outlet passages in spaced relation to one another. A control stem is movably positioned in a control chamber formed by the body member. A split expandable sleeve in the control chamber is movable by the control stem to provide overall volume control.

Abstract: A mixing valve has a cylindrical body member with inlet and outlet passages in spaced relation to one another. A control stem is movably positioned within the body member which defines a mixing chamber. A split expandable sleeve in the chamber is movable by the control stem to provide for regulation of outlet fluid temperature through mixing. Overall volume control is achieved by longitudinal movement of the control stem and dual valving action.