Hypodermic injection apparatus

• US 3,189,029 A
• Filed: 07/27/1961
• Issued: 06/15/1965
• Est. Priority Date: 08/04/1960
• Status: Expired due to Term

• Current Assignee: Russell Stephens Richard
• Original Assignee: Russell Stephens Richard
• Inventors: RUSSELL STEPHENS RICHARD
• Application Number:
  US04/127,218
• Time in Patent Office: 1,419 Days
• US Class Current: 604/70
• CPC Class Codes: A61M 2005/341 angularly adjustable or angled away from the axis of the injector
• CPC Class Codes: A61M 5/2053 Media being expelled from injector by pressurised fluid or vacuum for infusion A61M5/145, A61M5/155
• CPC Class Codes: A61M 5/30 Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules

Claims

1. A JET INJECTOR COMPRISING A FLUID-TIGHT CYLINDER PROVIDED WITH A CONNECTION FOR THE ADMISSION OF PRESSURIZED FLUID THERETO, A PISTON SLIDABLY MOUNTED WITHIN SAID CYLINDER FOR AXIAL MOVEMENT THEREIN UNDER THE ACTION OF THE PRESSURIZED FLUID, A PLUNGER MOUNTED FOR AXIAL MOVEMENT WITH SAID PISTON, SAID PISTON HAVING A SUBSTANTIALLY LARGER CROSS-SECTIONAL AREA THAN SAID PLUNGER, A HOLDER FOR LIQUID TO BE INJECTED SO MOUNTED WITH RESPECT TO SAID CYLINDER THAT ON AXIAL MOVEMENT OF THE PISTON AND PLUNGER UNDER THE ACTION OF THE PRESSURIZED FLUID, THE PLUNGER MOVES INWARDLY OF SAID HOLDER FOR EXPELLING LIQUID THEREFROM AND A NOZZLE PORTION PROVIDED WITH A FINE JET OPERABLY CONNECTED TO THE HOLDER FOR TRANSMITTING LIQUID EXPELLED FROM THE HOLDER BY THE PLUNGER.