Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1979-04-30
1982-02-16
Jones, Jr., James L.
Tools
Wrench, screwdriver, or driver therefor
Machine
254 29A, B25B 2902
Patent
active
043154468
ABSTRACT:
A stud tensioner device which connects to a engaging member integral with or connected to a stud to be placed in tension to permit a nut on the stud to be tightened. The stud is usually in a high pressure application such as a pipe line or various types of pressure vessel. The device for connecting to the engaging member is a cam actuating and clamping assembly having multilayers and partaking of translatory motion wherein the motion of one component translates into a different motion in another component. The device includes an actuating sleeve helically slotted to receive cam pins which pass through an axially slotted stationary ring to be received in one of two inner camming rings which are axially shifted by the pins responsive to rotation of the sleeve. Rotation of the actuating sleeve will cause the camming rings to move into and out of engagement with cam followers formed on or attached to a four segment clamp which is thus moved into and out of locking engagement with the engaging member. To facilitate the clamping engagement and release of the engaging member corresponding parallel circumferential ribs are formed on the clamp segments and the engaging member. Once clamped to the engaging member, hydraulic pistons associated with the device will be activated to place the stud in predetermined tension. A chuck device is associated with the assembly and will rotate the nut on the stud to the tightened position. Thereafter the hydraulic pressure is released allowing the clamps to be disengaged.
REFERENCES:
patent: 2780470 (1957-02-01), Ridout
patent: 3008362 (1961-11-01), Tucker
patent: 3844533 (1974-10-01), Markiewicz et al.
patent: 3995828 (1976-12-01), Orban
patent: 4120218 (1978-10-01), Togel et al.
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