Snap-on cartridge-needle unit

• US 2,828,743 A
• Filed: 06/17/1957
• Issued: 04/01/1958
• Est. Priority Date: 06/17/1957
• Status: Expired due to Term

• Current Assignee: David M. Ashkenaz, Marston L. Hamlin
• Original Assignee: David M. Ashkenaz, Marston L. Hamlin
• Inventors: Ashkenaz, David M., Hamlin, Marston L.
• Application Number:
  US03/665,929
• Time in Patent Office: 288 Days
• US Class Current: 604/193
• CPC Class Codes: A61M 5/24 Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic ampoules or carpules A61J1/06
• CPC Class Codes: A61M 5/288 by piercing without internal pressure increase A61M5/283 takes precedence
• 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: A61M 5/348 snap lock, i.e. upon axial displacement of needle assembly A61M5/344 takes precedence

Claims