Hypodermic injection system

摘要

The invention relates to a hypodermic injection system having a direct-drive motor for moving a ram towards an injectate chamber for discharging injectate therein through a discharge orifice. The system can have an injection head attached to a housing having an injectate chamber for holding injectate to be injected, a remote discharge device with a control apparatus or the structure for holding a cartridge containing injectate. The injectate supply could be a bottle, a remote reservoir or a cartridge. An injection head can have a nose actuator for enabling an injection only if the nose actuator has engaged the body to be injected. A clamping device clamps the body to be injected. Control is effected through a microprocessor to which the electrically-operated parts of the invention are attached. Control and output signals are readable through an electronic display.

主权项

1. A hypodermic injection system for removing injectate from an injectate supply for injection into subcutaneous, intramuscular or intradermal region of a body, said injection system comprising:
a removable and replaceable injection head operatively attachable to an injectate supply, said injection head including:
an injectate chamber for receiving injectate to be injected into a body;an assembly-holding device for holding an orifice exit nozzle to receive injectate from said injectate chamber and for delivering injectate to the body; and a drive system including:
a ram device for applying pressure to injectate in said injectate chamber while moving in a forward direction from an initial position to force a first settable amount of injectate into the exit nozzle and into the body, and for relieving the pressure upon completion of an injection and establishing a low pressure in said injectate chamber to effect the transfer of a second settable amount of injectate from the injectate supply to said injectate chamber;a volume restrictor settable according to a volume signal for limiting the distance said ram device is moved out of said injectate chamber to achieve a desired dosage of injectate; anda main actuator assembly operatively connected to a motor for actuating said motor.