Claims for Patent: 11,684,723

Summary for Patent: 11,684,723

Title:	Injector safety device
Abstract:	A safety member for use with an injection device is disclosed. The safety member includes a blocking ring extending into a housing of the injection device in blocking association with a latch member associated with a trigger mechanism of the injector, in which the blocking ring blocks movement of a portion of the trigger mechanism into a firing position. The safety member further includes a manipulable portion disposed outside the housing and configured for hand-manipulation by a user to remove the safety member from the housing to unblock the firing mechanism to enable firing of the injector.
Inventor(s):	Julius C. Sund, Eric Lagman, Peter A. HOEFT, Paul R. Lesch, Jr., Thomas E. Kramer
Assignee:	Antares Pharma Inc
Application Number:	US16/925,549
Patent Claims:	1. An injector, comprising: a housing; a container within the housing, the container defining a fluid chamber containing a medicament and including a plunger moveably disposed in the fluid chamber; a firing mechanism including a ram moveably disposed within the housing, the ram configured to move the plunger; a trigger moveably disposed within the housing between a ready position wherein the ram is prevented from moving and a firing position wherein the ram is permitted to move; a guard, the guard being moveable with respect to the housing from a protecting position to an actuating position, wherein the guard moves the trigger into the firing position as the guard moves from the protecting position to the actuating position; a first safety member configured to block movement of the trigger; and a second safety member configured to block movement of the guard. 2. The injector of claim 1, wherein the housing includes a first opening and wherein the first safety member extends through the first opening of the housing with an end of the first safety member disposed within the housing so as to abut a portion of the trigger. 3. The injector of claim 2, wherein the first safety member is retained within the first opening in the housing by a snap fit and is configured to be removed by a user to permit movement of the trigger into the firing position. 4. The injector of claim 2, wherein the first safety member is attached to a safety body disposed outside of the housing. 5. The injector of claim 1, further comprising: a latch moveably disposed within the housing, the latch engaged with a portion of the ram to prevent movement of the ram when the trigger is in the ready position and the latch disengaged from the ram when the trigger is in the firing position. 6. The injector of claim 5, wherein the trigger is moveable from the ready position to the firing position by a force in a first amount, and wherein a frictional relationship is present between the trigger and the latch creating a retaining force between the trigger and the latch in a second amount, and wherein the first safety member restricts the movement of the trigger into the firing position by providing a safety force to the trigger in a third amount such that the first amount is greater than the second amount by about 2.5 lbs. 7. The injector of claim 5, wherein the latch includes a flexible arm and a projection, wherein the ram includes an indentation, wherein the projection is receivable within the indentation, and wherein the projection is held within the indentation when the trigger is in the ready position. 8. The injector of claim 7, wherein the indentation and the projection are configured such that the latch restricts movement of the ram when the projection is held in the indentation by the trigger and such that movement of the trigger into the firing position allows the projection and the indentation to disengage and the ram to move axially relative to the latch. 9. The injector of claim 1, wherein the housing includes a second opening and the second safety member extends through the second opening such that an end of the second safety member abuts a portion of the guard, and wherein the second safety member is coupled to a safety body disposed outside of the housing. 10. The injector of claim 9, wherein the guard includes a proximal end and the trigger includes a distal end, wherein the proximal end of the guard is disposed axially spaced from the distal end of the trigger when the guard is in the protecting position, and wherein the second safety member is disposed axially between the proximal end of the guard and the distal end of the trigger. 11. The injector of claim 10, wherein the housing includes a first opening and wherein the first safety member extends through the first opening of the housing with an end of the first safety member disposed within the housing so as to abut a portion of the trigger, and wherein each of the first safety member and the second safety member are coupled to the safety body. 12. The injector of claim 10, wherein each of the first safety member and the second safety member are coupled to the safety body. 13. The injector of claim 1, wherein the guard extends distally of the housing and the guard moves proximally relative to the housing as the guard moves from the protecting position to the actuating position. 14. The injector of claim 1, wherein the second safety member blocks movement of the guard into the actuating position such that the trigger is restricted from moving into the firing position. 15. The injector of claim 1, further comprising: a needle associated with the container, the needle having a needle tip to penetrate skin of a patient to inject the medicament, wherein the guard has a distal end that is positioned distally of the needle tip when the guard is in the protecting position, and wherein the distal end of the guard is positioned proximally of the needle tip when the guard is in the actuating position. 16. The injector of claim 1, further comprising: a sleeve affixed within the housing and configured for retaining the container; and a third safety member slidably associated with the sleeve so as to be moveable from a first position into a second position, wherein the guard is retractable into the actuating position when the third safety member is in the first position and the guard is prevented from moving to into the actuating position when the third safety member is in the second position. 17. The injector of claim 16 further comprising: a biasing element positioned within the housing to resiliently bias the guard toward the protecting position such that subsequent to retraction of the guard into the actuating position, the guard returns to the protecting position, wherein retraction of the guard engages the guard with the third safety member, and wherein the subsequent return of the guard to the protecting position moves the third safety member into the second position. 18. The injector of claim 1, wherein the second safety member comprises a cap configured to cover an open end of the guard, wherein the guard includes a flange and the cap includes a projection coupled to the flange, a portion of the cap abutting a portion of the housing such that the cap restricts retraction of the guard into the actuating position. 19. The injector of claim 1, further comprising: a third safety member comprises a cap configured to cover an open end of the guard, wherein the guard includes a flange and the cap includes a projection coupled to the flange, a portion of the cap abutting a portion of the housing such that the cap restricts retraction of the guard into the actuating position. 20. The injector of claim 1, wherein the medicament is one of epinephrine, atropine or sumatriptan.