Syringes, syringe plungers and injector systems

A syringe for use with an injector having a drive member, the syringe comprising:

• a body portion;
• and
• a plunger slidably disposed within the body portion, the plunger comprising a releasable connection mechanism adapted to make a releasable connection with a connection member on the injector drive member, the releasable connection mechanism comprising at least one capture member attached to the plunger, the at least one capture member adapted to form a releasable engagement with the connection member upon contact of the drive member with the at least one capture member during forward motion of the drive member relative to the plunger when the at least one capture member is in an engagement position relative to the drive member, the at least one capture member further being adapted to resist disengagement from the connection member of the drive member when the drive member is moved rearward and the drive member and the at least one capture member are in the engagement position and to release the drive member upon rotation of the at least one capture member to a disengagement position relative to the drive member.

A syringe plunger adapted to be releasably connected to a drive member of an injector by means of a releasable connection mechanism, the releasable connection mechanism comprising at least one capture member associated with one of the plunger and the drive member, the at least one capture member adapted to form a releasable connection with the other of the drive member and the plunger upon contact of the drive member with the plunger during forward motion of the drive member relative to the plunger when the at least one capture member is in an engagement position, the at least one capture member further being adapted to resist disengagement from the other of the drive member and the plunger when the drive member is moved rearward and the at least one capture member is in the engagement position and to release one of the drive member and the plunger upon rotation of the at least one capture member to a disengagement position.

A plunger adapted to be releasably connected to an injector drive member by means of a releasable connection mechanism, the releasable connection mechanism comprising at least one capture member associated with one of the plunger and the drive member, the at least one capture member being fabricated from a relatively flexible material and adapted to deflect radially outwardly to cooperably form a releasable engagement with at least one radially outward extending flange associated with the other of the drive member and the plunger upon contact of the drive member with the plunger during linear forward motion of the drive member relative to the plunger when the at least one capture member is in an engagement position.

A plunger adapted to be releasably connected to an injector drive member by means of a releasable connection mechanism, the releasable connection mechanism comprising at least one capture member associated with the plunger, the at least one capture member adapted to form a releasable engagement with the drive member upon contact of the drive member with the plunger during linear forward motion of the drive member relative to the plunger when the at least one capture member is in an engagement position, the at least one capture member further being adapted to resist disengagement from the drive member when the drive member is moved rearward and the drive member and the at least one capture member are connected in the engagement position.