The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 1987
Filed:
Feb. 24, 1984
Heinrich Ulrich, Ulm/Donau, DE;
Klaus Zielke, Bad Wildungen, DE;
Firma Heinrich C. Ulrich, Ulm/Donau, DE;
Abstract
A spinal distraction apparatus has a distraction rod extending along an axis and having in turn a center part, a pair of end parts secured in, extending axially oppositely from, and rotatable about the axis relative to the center part, and a screwthread connection between each of the end parts and the center part. The screwthread connections are of opposite hand so that rotation of the center part in one direction moves the end parts axially toward each other and opposite rotation moves them axially apart. The end parts are axially nondisplaceable relative to the center part except on rotation of same about the axis. Respective anchors axially nondisplaceable on the end parts are adapted to be secured to respective vertebra. Formations between the anchors and the respective end parts prevent rotation of the end parts about the axis relative to the anchors.