Reusable automatic injection device

Abstract

A user-powered medicament injector including a reusable, user-powered automatic injection assembly including a user energizable medicament injection subassembly and a medicament module removably insertable into the reusable, user-powered automatic injection assembly and including a module housing adapted to receive a syringe having a barrel, a needle engaged to said barrel, and a removable needle cap covering the needle; a needle shield configured to be moveable with respect to the module housing and a needle cap remover associated with the needle shield. The medicament module is configured for energizing the user energizable medicament injection subassembly by insertion of the medicament module into the reusable, user powered automatic injection assembly.

1 .- 58 . (canceled) 
     
     
         59 . A medicament injector comprising:
 a reusable, user-powered automatic injection assembly including a medicament injection subassembly; and   a medicament module removably insertable into said reusable, user-powered automatic injection assembly;   said medicament injection subassembly including a plurality of sealing elements and a sealing element seating assembly which provides for varying damping of forward motion of said medicament injection subassembly along a longitudinal axis.   
     
     
         60 . A medicament injector according to  claim 59  and wherein said plurality of sealing elements and said sealing element seating assembly are configured to provide vacuum damping of said forward motion of said medicament injection subassembly along said longitudinal axis. 
     
     
         61 . A medicament injector according to  claim 59 , and wherein said reusable, user-powered automatic injection assembly also includes an end cover and said sealing element seating assembly with said plurality of sealing elements mounted thereon is operatively and frictionally engaged with said end cover. 
     
     
         62 . A medicament injector according to  claim 61  and wherein when said sealing element seating assembly is in rearward motion, said frictional engagement with said end cover is decreased and when said sealing element seating assembly is in forward motion, said frictional engagement with said end cover is increased. 
     
     
         63 . A medicament injector according to  claim 59  and wherein at least one slot is formed in said sealing element seating assembly in order to provide air passage of air trapped between said end cover and said plurality of sealing elements during said rearward motion. 
     
     
         64 . A medicament injector according to  claim 59  and wherein vacuum is created between said end cover and said plurality of sealing elements during said forward motion. 
     
     
         65 . A medicament injector according to  claim 59  and wherein said sealing element seating assembly includes a plurality of seating areas at a rearward end thereof, said seating areas each include a planar surface and a tapered surface. 
     
     
         66 . A medicament injector according to  claim 65  and wherein said plurality of sealing elements is configured to engage said planar surfaces during said rearward motion and is further configured to engage said tapered surfaces during said forward motion. 
     
     
         67 . A medicament injector according to  claim 62  and wherein said greater friction engagement and said partial vacuum are configured for preventing damage to at least part of said medicament injector during said forward motion of said sealing element seating assembly. 
     
     
         68 .- 71 . (canceled) 
     
     
         72 . A medicament injector according to  claim 60 , and wherein said reusable, user-powered automatic injection assembly also includes an end cover and said sealing element seating assembly with said plurality of sealing elements mounted thereon is operatively and frictionally engaged with said end cover. 
     
     
         73 . A medicament injector according to  claim 60  and wherein at least one slot is formed in said sealing element seating assembly in order to provide air passage of air trapped between said end cover and said plurality of sealing elements during said rearward motion. 
     
     
         74 . A medicament injector according to  claim 61  and wherein at least one slot is formed in said sealing element seating assembly in order to provide air passage of air trapped between said end cover and said plurality of sealing elements during said rearward motion. 
     
     
         75 . A medicament injector according to  claim 62  and wherein at least one slot is formed in said sealing element seating assembly in order to provide air passage of air trapped between said end cover and said plurality of sealing elements during said rearward motion. 
     
     
         76 . A medicament injector according to  claim 60  and wherein vacuum is created between said end cover and said plurality of sealing elements during said forward motion. 
     
     
         77 . A medicament injector according to  claim 61  and wherein vacuum is created between said end cover and said plurality of sealing elements during said forward motion. 
     
     
         78 . A medicament injector according to  claim 62  and wherein vacuum is created between said end cover and said plurality of sealing elements during said forward motion. 
     
     
         79 . A medicament injector according to  claim 63  and wherein vacuum is created between said end cover and said plurality of sealing elements during said forward motion. 
     
     
         80 . A medicament injector according to  claim 60  and wherein said sealing element seating assembly includes a plurality of seating areas at a rearward end thereof, said seating areas each include a planar surface and a tapered surface. 
     
     
         81 . A medicament injector according to  claim 61  and wherein said sealing element seating assembly includes a plurality of seating areas at a rearward end thereof, said seating areas each include a planar surface and a tapered surface. 
     
     
         82 . A medicament injector according to  claim 62  and wherein said sealing element seating assembly includes a plurality of seating areas at a rearward end thereof, said seating areas each include a planar surface and a tapered surface.