Abstract: A remote delivery device is provided which has media portholes in a sidewall, a tail piece attached to a rear end and a cannula attached to a front end. The body contains a plunger assembly which defines an injectable liquid chamber and a marking media chamber. The plunger assembly includes a front barbell plunger, rear barbell plunger and a plunger shaft with an O-Ring seated between the front and rear of said plunger shaft. The body also contains a single internal charge positioned behind the plunger assembly. When the charge is activated, the plunger assembly is thrust forwardly and dispenses an injectable liquid from the injectable liquid chamber through the cannula. Simultaneously, the plunger assembly also dispenses a marking media from the marking media chamber through marking media portholes. The provision of a single internal charge allows for a reduction in the length and weight of the device.

Abstract: A remote delivery device is disclosed which has a tubular body and a tubular tail piece. The tubular body is crimped onto said tail piece at a desired axial position with a rearmost edge of the body abutting the protrusions at only contact segments of the rear-most edge. With the provision of spaced-apart protrusion on the tail piece, axial expansion of said tubular body caused by a crimping operation imparts less stress and axial force on the tail piece as compared to stress and force which would be imposed upon a tail piece which has a singular annular abutment extending around an entire circumference of said tail piece. This results in reducing a rate of failure of said tail piece breaking off from said body when the remote delivery device is subjected to outside stresses or forces and allows for the use of a wider range of acceptable crimp lengths.

Abstract: A remote delivery device is provided which has media portholes in a sidewall, a tail piece attached to a rear end and a cannula attached to a front end. The body contains a plunger assembly which defines an injectable liquid chamber and a marking media chamber. The plunger assembly includes a front barbell plunger, rear barbell plunger and a plunger shaft with an O-Ring seated between the front and rear of said plunger shaft. The body also contains a single internal charge positioned behind the plunger assembly. When the charge is activated, the plunger assembly is thrust forwardly and dispenses an injectable liquid from the injectable liquid chamber through the cannula. Simultaneously, the plunger assembly also dispenses a marking media from the marking media chamber through marking media portholes. The provision of a single internal charge allows for a reduction in the length and weight of the device.

Abstract: A remote delivery device is disclosed which has a tubular body and a tubular tail piece. The tail piece is adapted to telescope part way into body and has a plurality of stop members provided at a desired axial position. The stop members are located at spaced-apart locations around an outer circumferential surface of the tail piece and extend radially outwardly beyond an inside diameter of the body so that a forward tail end of the tail piece can be inserted into the body only to the location of the said stop members at the desired axial position. The body is crimped onto said tail piece at the desired axial position with a rearmost edge of the body abutting the stop members.

Abstract: An improved injection dart is disclosed. A flow restrictor positioned at a forward end of a dart body is provided. The flow restrictor has a generally cylindrical restrictor body portion and a radially outward extending flange portion at a forward end thereof. The flange is securely held in position. The restrictor body also having a recess in a rearward end. The flange portion holds said restrictor in a position where an inner bore of a cannula is precisely aligned with the restrictor bore. The restrictor acts to diminish a variable flow rate so that all flow rates above a maximum flow rate are restricted to be less than the maximum flow rate. The flange also keeps a forward end of the flow channel bore open but allows for radially inward deformation of the restrictor at a rear end of said flow channel bore.

Abstract: An improved injection dart is disclosed. A flow restrictor positioned at a forward end of a dart body is provided. The flow restrictor has a generally cylindrical restrictor body portion and a radially outward extending flange portion at a forward end thereof. The flange is securely held in position. The restrictor body also having a recess in a rearward end. The flange portion holds said restrictor in a position where an inner bore of a cannula is precisely aligned with the restrictor bore. The restrictor acts to diminish a variable flow rate so that all flow rates above a maximum flow rate are restricted to be less than the maximum flow rate. The flange also keeps a forward end of the flow channel bore open but allows for radially inward deformation of the restrictor at a rear end of said flow channel bore.