Injection device with re-usable pressure generating means

Abstract

An injection device having a propulsion system having a container a compressible substance that when in a compressed state is a primary source of potential energy for propelling a fluid with sufficient pressure through an orifice of the container to create a jet enabling subcutaneous or intracutaneous delivery of the fluid. The potential energy is substantially a compression energy of the compressible substance. The device also including a pressure generating mechanism coupled to the container that compresses the compressible substance and that includes a rotatable member for exerting pressure on the compressible substance.

1 - 25 . (canceled)  
     
     
         26 . An injection device having a propulsion system comprising: 
 a container;    a compressible substance, wherein the compressible substance in a compressed state is a primary source of potential energy for propelling a fluid with sufficient pressure through an orifice of said container to create a jet enabling subcutaneous or intracutaneous delivery of the fluid, said potential energy is substantially a compression energy of said substance; and    a pressure generating mechanism coupled to said container, wherein the pressure generating mechanism compresses the compressible substance, the pressure generating mechanism comprising at least a rotatable member for exerting pressure on said compressible substance.    
     
     
         27 . The device according to  claim 26 , wherein the rotatable member is threaded.  
     
     
         28 . The device according to  claim 26 , wherein the rotatable member is rotated via a motor.  
     
     
         29 . The device according to  claim 26 , wherein the rotatable member performs rotations, whereby the number of rotations determines the pressure of the compressible substance.  
     
     
         30 . The device according to  claim 26 , wherein the pressure generating mechanism further comprises a a grip and a ram, the ram effecting pressure on the compressible substance.  
     
     
         31 . The device according to  claim 26 , wherein the pressure generating mechanism further comprises a piston, the piston being displaceable for compressing the volume of the compressible substance.  
     
     
         32 . The device according to  claim 31 , wherein the piston is threadably engaged with said rotational member.  
     
     
         33 . The device according to  claim 26 , wherein the pressure generating mechanism comprises a cap threadably couplable to said container.  
     
     
         34 . The device according to  claim 33 , wherein the pressure generating mechanism is separable from the container.  
     
     
         35 . The device according to  claim 34 , wherein the compressible substance is removable from the container.  
     
     
         36 . The device according to  claim 26 , wherein the compressible substance is mounted in a capsule.  
     
     
         37 . The device according to  claim 26 , further comprising a trigger mechanism for retaining the pressurized compressible substance as the pressure generating mechanism exerts pressure on the compressible substance.  
     
     
         38 . The device according to  claim 37 , wherein the trigger comprises a mechanical button.  
     
     
         39 . The device according to  claim 37 , wherein the trigger comprises a flange lever.  
     
     
         40 . The device according to  claim 37 , wherein the trigger is coupled to a motor.  
     
     
         41 . The device according to  claim 26 , further comprising a liquid supply system having a liquid supply reservoir interconnectable with the propulsion system.  
     
     
         42 . The device according to  claim 41 , wherein the liquid supply reservoir is interconnectable with the propulsion system through a valve controlling the blocking an opening of the orifice.  
     
     
         43 . The device according to  claim 42 , wherein the valve comprises a cylindrical portion comprising a first passage therein for interconnecting the liquid supply container with the propulsion system in a refiling position of the valve, and a second passage for interconnecting the propulsion system with the nozzle orifice in an actuated position of the valve.  
     
     
         44 . The device according to  claim 41 , wherein the liquid supply system comprises a feed mechanism for dosing the supply of the liquid, the feed mechanism and the pressure generating mechanism being driven by motors controlled by an electronic control system.  
     
     
         45 . The device according to  claim 26 , wherein the propulsion system comprises a secondary source of potential energy generating a lower pressure than the primary source of potential energy.  
     
     
         46 . The device according to  claim 45 , wherein the secondary source of potential energy comprises a spring.  
     
     
         47 . The device according to the  claim 45 , wherein the secondary source of potential energy comprises a gas in the propulsion system container.  
     
     
         48 . The device according to the  claim 45 , wherein the secondary source of potential energy comprises a pair of opposed magnets.