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:
Jun. 13, 1995
Filed:
Oct. 22, 1993
Michael E Miller, Indianapolis, IN (US);
Promex, Inc., Indianapolis, IN (US);
Abstract
A rotary surgical cutting instrument for use in cutting tissue within an anatomical space includes an outer cannula sized for percutaneous insertion into the anatomical space. The outer cannula defines a central bore along the length of the outer cannula and a cutting opening adjacent the distal end sized to receive tissue therethrough. A rotatably driven tubular cutting member is disposed within the central bore of the outer cannula, with a cutting edge rotating beneath the cutting opening of the cannula. The cutting edge extends at least substantially completely circumferentially around the tubular cutting head and circumscribes an angle relative to longitudinal and radial planes defined by the outer cannula. The cutting member can include a tubular cutting head and body portion that are connected by a hinge to permit pivoting of the cutting head relative to the body. The cutting member is formed from a flat sheet that is wound into a tubular shape within the outer cannula with opposite first and second edges adjacent each other. The cutting edge extends at an oblique angle between the first and second edges. The cutting edge is defined in the sheet at an oblique angle extending between the first and second edges. In one embodiment, the cutting head and body are formed by separate sheet portions attached by the hinge, the cutting head being formed from a trapezoidal sheet. In another embodiment, the cutting head and body are formed from one sheet.