US 5,782,128 AGranted

Hand tool for flaring a tube

AssigneeMastercool, Inc.

InventorsMike Barjesteh, Jerry Umbro, Ali M. Sadegh

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Abstract

A manually operable hand tool apparatus for providing a radially outward flare, known as push connect flare, away from the distal end of a deformable tube. The hand tool comprises a gripper-die means for securing the tube, a yoke portion having internal threads and a manual hydraulic pump portion. The yoke moves axially on a threaded positioning screw that is rigidly connected to the manual hydraulic pump portion. A vise means comprising a screw and a tightening rod is attached to the yoke. The vise is used to secure the gripper-die means to the yoke. The pump portion comprises a cylindrical body, a flaring piston, a threaded positioning screw, a pumping linkage system and a relief valve. An adapter-die is secured by a guide nut which is connected to the flaring piston. Alternative adapter-die and guide nut designs are also used to connect the die to the flaring piston. A lever arm is used to pump oil and to energize the flaring piston, thereby forcing the adapter-die to deform the rigidly restrained tube into the outward radial flair.

Claims11

Dependent claims

A hand tool tube push connect flaring apparatus for forming a radially outwardly convex extending, push connect flare close to, but not on, a distal end of a hollow malleable cylindrical tubing comprising:

gripper-die means for holding said tube;
a yoke member for securing said gripper-die means, said yoke member having a base with internal thread means at its base;
a hollow, cylindrical, externally threaded positioning screw member for engaging to the internal threads of said yoke;
a manual hydraulic pump apparatus rigidly connected to said positioning screw member, said hydraulic pump apparatus having a flaring piston comprising an elongated cylindrical rod axially extending outwardly from the pump, said flaring piston passing through the hollow space of said positioning screw member, said hydraulic pump apparatus having a lever arm for pumping fluid;
a guide nut member and a snap ring member, said guide nut member being loosely connected to said flaring piston by the snap ring member;
and,
an adapter-die member for pressing said tube in the axial direction of the tube, wherein said adapter-die member is secured by said guide nut, and is connected to said flaring piston.

4 more elements

Dependencies are inferred from the claim text.