Front-loading medical injector and syringe for use therewith

An injector for injecting a liquid from a syringe, the syringe having a plunger, said injector comprising:

• a housing having a front wall;
• readily releasable mounting means on said housing front wall for supporting the syringe for an injection operation, said readily releasable mounting means including retaining means for releasably engaging a retaining portion of the syringe;
• annular sealing means on the front wall of said housing for engaging annular sealing means on the syringe for preventing spilled liquid from a discharge end of the syringe from flowing rearward along the syringe into said injector housing, said retaining means of said readily releasable means being received between the annular sealing means and the retaining portion on the syringe with an interference fit;
• and
• drive means in said housing movable through said housing front wall for controlling the movement of the plunger in the syringe.

An injector for injecting a liquid from a syringe, said syringe having a plunger, said injector comprising:

• a housing having a front wall;
• readily releasable mounting means on said housing front wall for supporting the syringe for an injection operation, said readily releasable mounting means including retaining means for releasably engaging a retaining portion on the syringe, said readily releasable mounting means being an interlocking mechanism which is activated and released upon rotation of the syringe relative to the front wall of said housing;
• annular sealing means on the front wall of said housing for engaging a resilient annular sealing portion of the syringe when the syringe is mounted on said housing;
• said retaining means of said readily releasable mounting means being received between said annular sealing portion and said retaining portion on said syringe with an interference fit when said syringe is mounted on the front wall of said housing;
• audible-and-tactile indicating means for detecting when the syringe has been rotated into a desired mounted position relative to said housing front wall;
• sensor means for reading liquid media injection information from an indicator device on the syringe as the syringe is mounted on said housing front wall, and feeding the information to an injector control system;
• and
• drive means in said housing movable through said housing front wall for controlling the movement of the plunger in the syringe.

A front-loading syringe for injecting a liquid medium, comprising:

• an elongated cylindrical main body of relatively large uniform diameter;
• readily releasable mounting means on said cylindrical main body for mounting the syringe in a desired position relative to a front wall of an injector housing, at least one radially projecting retaining flange being located adjacent a forward end of said cylindrical main body, an elongated injection section of a relatively small diameter connected to a forward end of said cylindrical main body;
• and
• a plunger movably mounted in said cylindrical main body for forcing the liquid medium from the syringe through said injection section.

A front-loading syringe for injecting a liquid medium, comprising:

• an elongated cylindrical main body of relatively large uniform diameter and formed around an axis;
• readily releasable mounting means on said cylindrical main body for mounting the syringe in a desired position relative to a front wall of an injector housing, said readily releasable mounting means including at least one radially projecting flange on said cylindrical main body;
• an elongated injection section of relatively small diameter connected to a forward end of said cylindrical main body;
• a plunger movably mounted in said cylindrical main body for forcing the liquid medium from the syringe through said injection section;
• and
• a circumferentially extending and radially projecting sealing flange on said cylindrical main body spaced in a direction parallel to said axis from said at least one radially projecting retaining flange and cooperable therewith for mounting the syringe on the injector housing with an interference fit.

A front-loading syringe for injecting a liquid medium, comprising:

• an elongated cylindrical main body of relatively large uniform diameter and having a plurality of spaced reinforcing ribs;
• readily releasable mounting means on said cylindrical main body for mounting the syringe in a desired position relative to a front wall of an injector housing;
• an elongated injection section of relatively small diameter connected to a forward end of said cylindrical main body;
• and
• a plunger movably mounted in said cylindrical main body for forcing the liquid medium from the syringe through said injection section.

A front-loading syringe for injecting a liquid medium, comprising:

• an elongated cylindrical main body of relatively large uniform diameter;
• readily releasable mounting means on said cylindrical main body for mounting the syringe in a desired position relative to a front wall of an injector housing;
• an elongated injection section of relatively small diameter connected to a forward end of said cylindrical main body;
• a plunger movably mounted in said cylindrical main body for forcing the liquid medium from the syringe through said injection section;
• and
• at least one reinforcing-handle portion extending along one side of said injection section.

A front-loading syringe for injecting a liquid medium, comprising:

• an elongated cylindrical main body of relatively large uniform diameter;
• readily releasable mounting means including at least one radially projecting flange on said cylindrical main body for mounting the syringe in a desired position relatively to a front wall of an injector housing;
• an elongated injection section of relatively small diameter connected to a forward end of said cylindrical main body;
• a plunger movably mounted in said cylindrical main body for forcing the liquid medium from the syringe through said injection section;
• second readily releasable means on said plunger for connecting said plunger to a plunger drive member in said injector housing;
• a circumferentially extending and radially projecting sealing flange of resilient construction on said cylindrical main body in a preselected spaced relationship from said at least one radially projecting retaining flange and cooperable therewith for mounting the syringe on said injector housing with an interference fit;
• audible-and-tactile indicating means on said cylindrical main body for detecting when said syringe has been located in a desired mounted position;
• and
• indicator means on said cylindrical main body for providing liquid media injection information to said injector as said syringe is mounted on said injector.

Apparatus for injecting a liquid medium, comprising:

• a front-loading syringe for holding the liquid medium and having a plunger;
• an injector housing having a front wall;
• readily releasable mounting means for supporting said front-loading syringe on said housing front wall for an injection operation;
• annular sealing means on the front wall of said housing for engaging annular sealing means on said syringe adjacent a rearward end thereof, for preventing spilled liquid media from a discharge end of said syringe from flowing rearward along said syringe into said injector housing;
• a retaining flange of said readily releasable mounting means which is received between said annular sealing means on said syringe and a retaining flange on said syringe with an interference fit;
• and
• drive means movable through said housing front wall for controlling the movement of said plunger in said syringe.

Apparatus for injecting a liquid medium, comprising:

• a front loading syringe for holding the liquid medium, said syringe including longitudinally spaced reinforcing ribs formed thereon which encircle said syringe so as to also function as volumetric gradations;
• an injector housing having a front wall;
• readily releasable mounting means for supporting said front loading syringe on said housing front wall for an injection operation;
• and
• drive means movable through said housing front wall for controlling the movement of a plunger in said syringe.

Apparatus for injecting a liquid medium, comprising:

• a front-loading syringe for holding the liquid medium, said syringe including an elongated injection section, at least one reinforcing-handle portion of said syringe extending along one side of said injection section;
• an injector housing having a front wall;
• readily releasable mounting means for supporting said front-loading syringe on said housing front wall for an injection operation;
• and
• drive means movable through said housing front wall for controlling the movement of said plunger in said syringe.

Apparatus for injecting a liquid medium, comprising:

• a front-loading syringe for holding the liquid medium and having a plunger;
• an injector housing having a front wall;
• readily releasable mounting means for supporting said front-loading syringe on said housing front wall for an injection operation;
• drive means movable through said housing front wall for controlling the movement of said plunger in said syringe;
• annular sealing means on the front wall of said housing for engaging a resilient annular sealing member on said syringe;
• said readily releasable mounting means including a syringe retaining flange on said housing front wall received between a retaining flange on said syringe and said resilient annular sealing member on said syringe with an interference fit;
• audible-and-tactile indicating means for detecting when said syringe has been rotated into a desired position on said housing front wall;
• means for controlling the operation of the apparatus;
• indicator means on said syringe for providing liquid media injection information for the operation of said control means;
• and
• sensor means on said housing front wall for reading said indicator means as said syringe is mounted on said housing front wall, and for feeding the information to said control means.