×

Injection apparatus and method with automatic aspiration feature

  • US 3,977,402 A
  • Filed: 07/14/1975
  • Issued: 08/31/1976
  • Est. Priority Date: 03/25/1975
  • Status: Expired due to Term
First Claim
Patent Images

1. An intramuscular injection system comprising:

  • a. housing meansb. needle means in said housing mounted for linear movement in a first direction from a retracted position in the housing to a position protruding forwardly out of said housing,c. linearly movable chemical medication chamber means in said housing having a rupturable portion in alignment with said needle means such that said needle means will rupture said medication chamber means upon selective relative movement of said needle and medication chamber means,d. fluid propulsion means adapted to effect said selective relative movement of said needle means and medication chamber means and to effect linear movement of said needle means between said retracted and protruding positions, ande. aspirating means for automatically creating a partial vacuum in said medication chamber means after said needle has been moved into its protruding position.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×