Spinal cannula with hollow needle mandrel and holding grip

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Description

FIG. 1 is a perspective view of my new spinal cannula design with hollow needle, mandrel and holding grip;

FIG. 2 is a perspective view of the design of FIG. 1 without the hollow needle, mandrel and holding grip;

FIG. 3 is a front view of the design of FIG. 1 showing the mandrel and holding grip in a retracted position;

FIG. 4 is a view similar to FIG. 3 showing the mandrel and holding grip in a non-retracted position;

FIG. 5 is a front view of the spinal cannula without mandrel, hollow needle and holding grip;

FIG. 6 is a right side view of the spinal cannula without mandrel, hollow needle and holding grip, the left side view being identical;

FIG. 7 is a bottom view of the spinal cannula without hollow needle, mandrel and holding grip;

FIG. 8 is a bottom view of the spinal cannula without hollow needle, mandrel and holding grip;

FIG. 9 is a top view of the spinal cannula without hollow needle, mandrel and holding grip;

FIG. 10 is a bottom view of the spinal cannula with hollow needle, mandrel and holding grip; and,

FIG. 11 is a rear end view of the spinal cannula with hollow needle, mandrel and holding grip.

Referenced Cited
U.S. Patent Documents
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D303290 September 5, 1989 McMenamy et al.
D342995 January 4, 1994 Simmons
D353454 December 13, 1994 Coombs
4137916 February 6, 1979 Killman et al.
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4356828 November 2, 1982 Jamshidi
4585444 April 29, 1986 Harris
4609370 September 2, 1986 Morrison
4721506 January 26, 1988 Teves
4828549 May 9, 1989 Kvalo
4846799 July 11, 1989 Tanaka et al.
4994036 February 19, 1991 Biscoping et al.
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5100390 March 31, 1992 Lubeck et al.
5104381 April 14, 1992 Gresl et al.
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Patent History
Patent number: D371195
Type: Grant
Filed: Jun 8, 1994
Date of Patent: Jun 25, 1996
Inventor: Peter Krebs (78048 VS-Villingen)
Primary Examiner: Louis S. Zarfas
Assistant Examiner: I. Simmons
Law Firm: McGlew and Tuttle
Application Number: 0/24,128