Injector with adjustable dosing
First Claim
1. An injection device for injecting medicament in a patient comprising:
- a fluid chamber configured to contain a medicament;
a housing configured to house the fluid chamber;
an injection conduit associated with the fluid chamber for defining a fluid pathway from the fluid chamber to the patient;
a firing mechanism associated with the fluid chamber and configured to be actuated to expel the medicament from the fluid chamber through the injection conduit, the firing mechanism comprising;
a ram configured to move with respect to the fluid chamber, thereby dispelling medicament from the fluid chamber, wherein the ram is threaded and is positioned along a longitudinal axis of the injection device;
a trigger having protrusions biased outwardly and in blocking association with the ram in a protecting position; and
a latch housing configured to retain the trigger protrusions in blocking association with the ram in the protecting position and allow the trigger protrusions to disengage from the ram in an injection position; and
a volume control mechanism configured to be adjusted to select a volume of the medicament from the fluid chamber that is injected from the injection conduit when the firing mechanism is actuated, wherein the volume control mechanism includes a stopping member rotatably coupled to the ram and a user engageable control removably coupled to the ram to rotate the ram about the longitudinal axis to select the volume of the medicament to be injected by selectively adjusting the position of the stopping member relative to the ram, wherein adjusting the position of the stopping member includes repositioning the stopping member longitudinally along the ram.
1 Assignment
0 Petitions
Accused Products
Abstract
An injector for injecting a medicament in a patient. The injector includes a container comprising a fluid chamber containing a first volume of a medicament, and an injection conduit associated with the fluid chamber for defining a fluid pathway therefrom to inject the medicament from the fluid chamber through the injection conduit to an injection location. The injector also includes a firing mechanism associated with the fluid chamber for expelling the medicament from the fluid chamber through the injection conduit, and a volume-control mechanism operable to control a fraction of the first volume of medicament that is injected when the firing mechanism is actuated to inject the medicament.
422 Citations
18 Claims
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1. An injection device for injecting medicament in a patient comprising:
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a fluid chamber configured to contain a medicament; a housing configured to house the fluid chamber; an injection conduit associated with the fluid chamber for defining a fluid pathway from the fluid chamber to the patient; a firing mechanism associated with the fluid chamber and configured to be actuated to expel the medicament from the fluid chamber through the injection conduit, the firing mechanism comprising; a ram configured to move with respect to the fluid chamber, thereby dispelling medicament from the fluid chamber, wherein the ram is threaded and is positioned along a longitudinal axis of the injection device; a trigger having protrusions biased outwardly and in blocking association with the ram in a protecting position; and a latch housing configured to retain the trigger protrusions in blocking association with the ram in the protecting position and allow the trigger protrusions to disengage from the ram in an injection position; and a volume control mechanism configured to be adjusted to select a volume of the medicament from the fluid chamber that is injected from the injection conduit when the firing mechanism is actuated, wherein the volume control mechanism includes a stopping member rotatably coupled to the ram and a user engageable control removably coupled to the ram to rotate the ram about the longitudinal axis to select the volume of the medicament to be injected by selectively adjusting the position of the stopping member relative to the ram, wherein adjusting the position of the stopping member includes repositioning the stopping member longitudinally along the ram. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification