Screw-nut for screwing implants together

Details Screw-nut for screwing implants together Screw-nut for screwing implants together

1993-04-22

1994-07-19

Isabella, David

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

623 18, A61F 238

Patent

active

053305353

ABSTRACT:
A screw-nut for screwing implants together includes a thrust-shoulder which projects radially and presses axially against part of a housing. The screw-nut further includes an internal threaded portion adapted to fit a corresponding screw part, and a plurality of members, each mounted onto the side of the thrust-shoulder facing away from the part of the housing against which the thrust shoulder presses. These members are adapted to receive a tool for tightening the screw-nut. A plurality of leaf springs is included for engaging the housing part. The leaf springs, the ends of which form latching-in dogs, project, in the axial direction, from the screw-nut. The leaf springs are constructed such that, when the thrust-shoulder makes contact with the housing part, each latching-in dog snaps into a recess in the housing part in order to prevent loosening of the screw-nut from the housing part.

REFERENCES:
patent: 3053357 (1962-09-01), Stanger
patent: 4822366 (1989-04-01), Bolesky
patent: 4936853 (1990-06-01), Fabian et al.

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