Disposable sterile syringes, needle containers and the like having prestressed frangible portions therein

• US 3,306,291 A
• Filed: 04/14/1964
• Issued: 02/28/1967
• Est. Priority Date: 04/14/1964
• Status: Expired due to Term

• Current Assignee: George K. Burke
• Original Assignee: George K. Burke
• Inventors: Burke, George K.
• Application Number:
  US04/359,674
• Time in Patent Office: 1,050 Days
• US Class Current: 604/110
• CPC Class Codes: A61M 5/002 Packages specially adapted therefor, e.g. for syringes or needles, kits for diabetics needle protection, e.g. caps, A61M5/3202; for sharps A61B50/3001
• CPC Class Codes: A61M 5/178 Syringes
• CPC Class Codes: A61M 5/31515 Connection of piston with piston rod
• CPC Class Codes: A61M 5/3202 Devices for protection of the needle before use, e.g. caps A61M5/50 takes precedence; for infusion spikes A61M5/1626; protectors for sharps A61B50/3001
• CPC Class Codes: Y10S 215/03 Medical

Claims

6. A DISPOSABLE STERILE MEDICAL AND SURGICAL DEVICE COMPRISING A HOLLOW BODY MEANS FORMED OF ORGANIC PLASTIC MATERIAL OF LOW MOLECULAR WEIGHT WHICH IS HARD FLOWING AND SETS UP QUICKLY IN A MOLD AND IS DIFFICULT TO BREAK, SAID BODY MEANS INCLUDING AN INTERMEDIATE FRANGIBLE PORTION FOR SEPARATING THE BODY MEANS INTO TWO SEPARATE PIECES, SO THAT THE BODY MEANS CANNOT BE EFFECTIVELY REUSED FOR ITS INTENDED PURPOSE, SAID FRANGIBLE PORTION INCLUDING A PRESTRESSED AREA HAVING A CONCENTRATION OF STRESSES THEREIN TO RENDER SAID AREA READILY BREAKABLE BY MANUAL EFFORT, AND ENCLOSURE MEANS DISPOSED IN TELESCOPING RELATIONSHIP WITH SAID BODY MEANS AND BEING ENGAGED THEREWITH TO DEFINE WITH THE BODY MEANS AN ENCLOSED SPACE.