Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1985-06-03
1986-02-11
Jones, Jr., James L.
Tools
Wrench, screwdriver, or driver therefor
Machine
254 29A, B25B 2902
Patent
active
045692580
ABSTRACT:
A power driven stud tensioner device which connects to an engaging member integral with or connected to a stud to be placed in tension after which a nut on the stud is tightened. The device for placing the stud in tension is a cam actuated clamping assembly having a plurality of layers wherein motion of one component translates into a different motion in another component. The device includes a helically slotted actuating sleeve which receives cam pins passing through an axially slotted stationary ring which are then received in one of two inner camming rings which are axially shifted by the pins in response to rotation of the sleeve. Rotation of the actuating sleeve, which is driven externally by a power drive including a gear assembly connected to the sleeve, will cause the camming rings to move into and out of engagement with cam followers formed on, or attached to, a four segmented clamp which is thus moved into, and out of, locking engagement with the engaging member.
To facilitate the clamping 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, hydraulically actuated pistons will be activated to place the stud in predetermined tension. The device also includes a chuck which will rotate the nut on the stud to tighten it. Thereafter, the hydraulic pressure is released allowing the clamps to disengage.
This device is employed for fastening studs in high pressure applications such as a pipe line or high pressure vessel.
REFERENCES:
patent: 2780470 (1957-02-01), Ridout
patent: 3877326 (1975-04-01), Kock et al.
patent: 4027559 (1977-06-01), Wallrafen
patent: 4047456 (1977-09-01), Scholz
patent: 4273011 (1981-06-01), Exner et al.
patent: 4314690 (1982-02-01), Mlynarik et al.
patent: 4315446 (1982-02-01), Orban
Jones Jr. James L.
Weingram Edward R.
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