Threaded screw cannula

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Description

FIG. 1 is a perspective view of a threaded screw cannula showing our new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a side elevational view thereof;

FIG. 5 is a front end elevational view thereof; and,

FIG. 6 is a back elevational view thereof.

Referenced Cited
U.S. Patent Documents
D291246 August 4, 1987 Lower
D354810 January 24, 1995 Nazre
D357534 April 18, 1995 Hayes
D358645 May 23, 1995 Ryan et al.
D359557 June 20, 1995 Hayes
3892232 July 1975 Neufeld
4450834 May 29, 1984 Fischer
4450835 May 29, 1984 Asnis et al.
4512344 April 23, 1985 Barber
4683896 August 4, 1987 Herbst et al.
4872451 October 10, 1989 Moore et al.
4963144 October 16, 1990 Huene
5147367 September 15, 1992 Ellis
5211647 May 18, 1993 Schmieding
5431651 July 11, 1995 Goble
Other references
Patent History
Patent number: D398996
Type: Grant
Filed: Feb 27, 1997
Date of Patent: Sep 29, 1998
Assignee: Smith & Nephew, Inc. (Memphis, TN)
Inventors: Ricardo J. Simmons (Franklin, MA), Rebecca A. Blough (Lincoln, RI), Donald J. Fournier (North Providence, RI)
Primary Examiner: Doris Clark
Law Firm: Fish & Richardson P.C.
Application Number: 0/67,417
Classifications
Current U.S. Class: Guide Or Gauge (D24/140); Cutting, Abrading, Scraping Or Puncturing (31) (D24/146)
International Classification: 2402;