Patent ID: 8845596
Filing Date: 2014-09-30
Classification: A61M

Abstract:
1. A focused dosimetry device for use in facilitating the delivery of two successive doses of a substance, from a single volume of the substance contained in the device, during successive first and second modes of operation of the device, which comprises: a cartridge formed with a barrel having a passage through the barrel between a proximal end of the barrel and an axially spaced distal end of the barrel; the barrel having an exterior shape of a prescribed configuration; a plunger locatable and movable within the passage of the barrel; a stem having a distal end positionable through the proximal end, and to a position within the passage, of the barrel to facilitate movement of the plunger within the barrel; the stem formed with a proximal end spaced from the distal end thereof; the stem formed with an intermediate section externally of the barrel and along an axis of the stem between the distal end and the proximal end thereof; a cartridge-supporting carrier formed with a cartridge-receiving nest; means, formed on the carrier, for removably retaining the cartridge within the cartridge-receiving nest; a support member located on the carrier; a passage formed through the support member; an opening formed in the support member in communication with the passage to facilitate positioning of at least a portion of the intermediate section of the stem within the passage; the support member being formed with a pair of ears normally spaced apart by a distance which defines a normal width of the opening; the pair of ears being sufficiently resilient to be spread farther apart by a distance greater than the normal width of the opening to facilitate movement of the intermediate section of the stem through the opening and into and out of the passage; the ears formed with portions which engage adjacent portions of the intermediate section of the stem when the intermediate section is located in the passage to maintain the intermediate section within the passage; means, formed on the carrier, distally of a flange of the barrel when the cartridge is removably retained within the cartridge-receiving nest, for facilitating selective positioning of the cartridge in different locations on the carrier distally spaced from the flange of the barrel during successive first and second modes of operation of the device; and means for allowing the intermediate section of the stem to be moved along the axis of the stem relative to the carrier while the stem is retained by the support member.