Patent ID: 6572581
Filing Date: 2003-06-03
Classification: A61M

Abstract:
An ergonomic jet injection device comprising:an elongate generally cylindrical device body having a forward end; a drug cartridge carried at the forward end of said device body and having a cylinder in which a piston is movable to cooperatively define a variable-volume chamber holding a dose of liquid medication; a fine-dimension injection orifice in liquid flow communication with said variable-volume chamber to receive the liquid medication and discharge this medication as a high velocity forceful jet for jet injection of the medication upon forceful movement of said piston in said cylinder; a power source in said device body for forcefully moving said piston in said cylinder in response to triggering of said injection device, and a trigger assembly for initiating forceful movement of said piston, said trigger assembly including a trigger pad outwardly disposed on the device body proximate to said forward end and so configured and disposed as to be activated by a user's thumb; wherein said device body includes two portions which are relatively rotational from a â€œstorageâ€  to an â€œinjectâ€  configuration of the device, a rear one of said device body portions carrying said trigger pad, and a forward one of said device body portions including a safety feature preventing activation of said trigger pad while said body portions are in said â€œstorageâ€  relative rotational position.