Hand-piece for injection device with a retractable and rotating needle

An automatic injection system comprising:

• a tank holding a therapeutic liquid;
• a pump arranged to pump said liquid through a tubing;
• a hand-piece associated with said tubing and having a housing, said handpiece including a needle having a first position in which said needle extends outwardly from said housing and a second position inside said housing;
• and
• a control member coupled to-said housing and arranged to selectively move said needle between said first and second positions, said control member being arranged to rotate said needle about an axis of said housing as said needle is translated between said first and said second positions, as said control member is translated without rotating with respect to said housing.

An injection device comprising:

• a hand-piece;
• a control member mounted for translation along said hand piece;
• and
• a needle having a sharp tip and an opposed base connected to a source of therapeutic agent, wherein said hand-piece and needle cooperate to allow said needle to be advanced with respect to said hand-piece in a combined and simultaneous rotational and translational motion as said control member is translated without rotating with respect to said handpiece.

An injection system comprising:

• a source of a therapeutic liquid;
• a tubing coupled to said source and arranged to transfer said liquid;
• a hand-piece associated with said tubing and having a housing, said handpiece including a needle having a first position in which said needle extends outwardly from said housing and a second position inside said housing;
• and
• a control member coupled to said housing and arranged to selectively move said needle between said first and second positions, said control member causing said needle to rotate about an axis of said housing as said needle is translated between said first and said second positions, as said control member is translated without rotating with respect to said housing.

An injection device for delivering a liquid such as a therapeutic agent to a patient, said device comprising:

• a cylindrical housing;
• a needle supported by said housing and movable between a retracted position in which said needle is disposed inside the housing and a protracted position in which at least a portion of said needle is disposed outside the housing to allow the injection of liquid;
• a control member mounted on said housing and adapted to translate said needle between said retracted and said protracted position as said control member is translated without rotating with respect to said housing;
• and
• a rotating member coupled to said needle and adapted to simultaneously rotate said needle as said needle is translated between said retracted and protracted positions by said control member.