Metal deforming – By deflecting successively-presented portions of work during... – By use of work-contacting wiper and moving – work-holding form
Patent
1994-05-13
1996-08-27
Jones, David
Metal deforming
By deflecting successively-presented portions of work during...
By use of work-contacting wiper and moving, work-holding form
72157, 72479, B21D 704, B21D 905
Patent
active
055489850
ABSTRACT:
A bender for bending metal rod to form surgical implants in a sterile operating room environment. The bender being made of an autoclavable material having a hardness greater than the maximum hardness of the rod to be bent. The bender includes a capstan, a primary mandrel, a gripping element, and a follower mandrel. The primary mandrel, which rotates with the capstan, includes at least one generally cylindrical portion with a guide channel formed in the periphery thereof. The follower mandrel also includes at least one generally cylindrical portion with a guide channel formed in the periphery thereof. The follower guide channels are disposed in planar alignment with the corresponding guide channel of the primary mandrel to form bending channels therebetween. The gripping member is mounted for rotation with said primary mandrel, and encloses a portion of the primary mandrel guide channel(s) to form a passageway of predetermined configuration. The passageway(s) is configured such that when the primary mandrel is rotated to a predetermined position, said passageway is brought into general alignment with the corresponding bending channel, and the rod can be journaled through the passageway and through the bending channel without bending.
REFERENCES:
patent: 4926672 (1990-05-01), Swanson
patent: 5148695 (1992-09-01), Ellis
Jones David
Lechter Michael A.
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