United States Patent [19]
Zerbst et al.
[11] Patent Number: 4,850,994 [45] Date of Patent: Jul. 25, 1989
[54] HYPODERMIC SYRINGE
[75] Inventors: Ekkehard Zerbst; Tim Peters;
Hans-Eberhard Koralewski, all of
Berlin, Fed. Rep. of Germany
[73] Assignee: Physionic Gesellschaft fur
Medizin-und Systemtechnik GmbH,
Fed. Rep. of Germany
[21] Appl. No.: 67,451
[22] Filed: Jun. 10, 1987
[30] Foreign Application Priority Data
Oct. 11, 1985 [DE] Fed. Rep. of Germany 3536754
Oct. 11, 1985 [DE] Fed. Rep. of Germany 3536755
Oct. 11, 1985 PE] Fed. Rep. of Germany 3536756
Nov. 1, 1985 [DE] Fed. Rep. of Germany 3539247
Mar. 18, 1986 [DE] Fed. Rep. of Germany 3609516
[51] Int. CI* A61M5/32
[52] U.S. CI 604/198; 604/263
[58] Field of Search 604/192, 197, 198, 263
[56] References Cited
U.S. PATENT DOCUMENTS
2,571,653 10/1951 Bastien 604/198
4,356,822 11/1982 Winstead-Hall 604/117
4,631,057 12/1986 Mitchell 604/198
4,681,567 7/1987 Masters et al 604/198
Primary Examiner—Martin P. Schwadron
Assistant Examiner—Allen J. Flanigan
Attorney, Agent, or Firm—McGlew & Turtle
[57] ABSTRACT
The invention relates to a hypodermic syringe in which a hollow needle is surrounded by a protective sheathing in such a way that after the injection has been performed the protective sheathing encloses the tip of the hollow needle to provide protection.
5 Claims, 7 Drawing Sheets
