Medicament device for use with a conventional syringe

Abstract

The novel devices comprise a housing that preferably contains a preloaded, conventional syringe with medication. Both trained and untrained users may administer an injection safely and conveniently to themselves or others in myriad settings. The disclosed devices rely on the user's manual action to insert the needle. Only after the needle is fully inserted is the medicament delivered, resulting in a safer injection. After use, the devices include a locking mechanism that locks a spring-loaded sheath in place around the needle for protection. As a common syringe is utilized, engineering and production issues of automatic injectors' custom syringe assemblies are avoided.

1 . A device for administering medicament using a conventional syringe, the device comprising:
 a body assembly configured to receive a conventional syringe, the body assembly having a top and an opposing bottom;   a housing cap at the top of the body assembly; and   a first spring disposed between the body assembly and housing cap,
 wherein the body assembly comprises a housing, a sheath slideably contained within the housing, a sheath lock disposed within the housing opposite the sheath, and a second spring disposed within the sheath lock. 
   
     
     
         2 . The medicament device of  claim 1 , further comprising a sheath clip disposed in an annular groove within the housing for retaining the sheath during handling of the device. 
     
     
         3 . The medicament device of  claim 1 , further comprising a sheath cap disposed about the bottom of the body assembly. 
     
     
         4 . The medicament device of  claim 1 , wherein the sheath lock is configured to frictionally engage flanges of a barrel of a conventional syringe. 
     
     
         5 . The medicament device of  claim 1 , wherein the housing is substantially the same length as a barrel of a conventional syringe. 
     
     
         6 . The medicament device of  claim 1 , wherein the sheath is substantially the same length as a barrel of a conventional syringe. 
     
     
         7 . The medicament device of  claim 1 , wherein the second spring requires less compression force than the first spring. 
     
     
         8 . A method of using a device for administering medicament using a conventional syringe having a needle, the method comprising:
 utilizing a primary stroke to slide a sheath into a housing body containing the syringe and thereby expose the needle, wherein the primary stroke must overcome the force of a sheath spring biasing the sheath away from the housing body; and   utilizing a secondary stroke to administer medicament contained within the syringe after the primary stroke is complete.   
     
     
         9 . The method of  claim 8 , wherein after the secondary stroke is complete, a locking mechanism of the device precludes the use of another primary stroke. 
     
     
         10 . The method of  claim 9 , wherein the sheath has sheath fingers, and wherein the locking mechanism comprises a sleeve, sleeve tracks, sheath pins, and sheath snaps,
 wherein the sleeve is slideably disposed within the housing body at an end opposite the sheath,   wherein the sheath pins and sheath snaps protrude from the interior of the sheath,   wherein the sleeve tracks are cut within the sleeve and configured to engage the sheath pins, and   wherein the sheath fingers are configured to engage the sheath snaps.