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:
Dec. 18, 1979
Filed:
Aug. 10, 1977
Edward A Tischlinger, East Lyme, CT (US);
Other;
Abstract
A self injector having a spring powered gun assembly including a plunger rod driven forwardly by a compressed spring which is releasable by a retainer member to fire the plunger rod, and a cartridge assembly connected to said gun assembly, the cartridge assembly comprising a cylindrical shield connected to the gun assembly, a cartridge slidably positioned within the shield and including a cartridge tube with a slidable plunger closing off one end and a flexible diaphragm closing off the other to form a medicament chamber therebetween. A nose piece is affixed to the diaphragm end of the cartridge tube and mounts a cannula on its outside portion in fluid communication with the area on the cannula side of the diaphragm. The plunger rod is aligned with the cartridge plunger whereby when the gun is fired the plunger rod will push the plunger forwardly in the cartridge tube to cause the flexible diaphragm to contact and be pierced by a spike in the cartridge tube thereby establishing fluid communication between the medicament chamber and the cannula for injection purposes.