Eli Lilly and Company

Bradley James Simpson

Jesse Arnold Fourt

James Rolfe Yurchenco

Jennifer Ellen Davis-Wilson

A delay mechanism for an automatic injection device having a housing and a medication filled syringe. The delay mechanism includes a shuttle, a follower, a damping compound, at least one biasing member, and a biased plunger element. When moved in the device housing from a first location to a second location, the biased plunger element is adapted to drive the syringe piston within syringe barrel to force medication through the syringe needle for an injection. The follower, when the plunger element is so moved, is freed to move, under urging of the at least one biasing member, from a first position on the housing toward a second position to thereby move the shuttle for retracting the syringe needle into the housing after injection. The damping compound dampens or slows rotation of the follower as the follower moves from the first position toward the second position.

Delay mechanism suitable for compact automatic injection device

A trigger assembly for an automatic injection device which by its operation releases a biased element of the device for movement. The trigger assembly includes a button pressable by a user, and a lock member. Prior to the button being plunged, a blocking element on the button is abutted by a button-engaging surface of the lock member to prevent lock member rotation, thereby allowing an engagement surface on the lock member to remain in engagement with an engagement surface of the biased element so as to restrain motion of the biased element. When the button is plunged, the blocking surface moves clear of the button-engaging surface to allow the lock member to rotate, during which rotation the engagement surfaces disengage to release the biased element for movement.

Trigger assembly for an automatic injection device

Automatic injection device with trigger assembly. The trigger assembly includes a button (), and a single prong () extending from a biased element of the device toward the button. A button-engaging surface () of the prong and a support surface of the device define a radially extending opening in which an actuating element () of the button fits for a radially outward face of the actuating element to be backed up by the support surface. For release of the biased element, when the button is pressed to shift the actuating element to cause a latching surface of the prong to disengage from a latch surface of the device, motion of the actuating element in a direction away from the prong is limited by the radially outward face of the actuating element abutting the support surface.

Growing community of inventors

Oakland, CA, United States of America

Bradley James Simpson