Patent ID: 8568420

Claim:
A device for delivering a bone filler material comprising: a housing having a throughbore; a plunger comprising a shaft having external threads, wherein the plunger is configured for advancement through the throughbore of the housing; and a threaded receiving member configured to releasably engage the plunger, wherein the housing comprises a chamber that intersects the throughbore, wherein the threaded receiving member is disposed in the chamber, and wherein the threaded receiving member comprises an upper receiving member and a lower receiving member, wherein a spring biases the lower receiving member such that the upper receiving member and the lower receiving member form a threaded throughbore configured for threadedly receiving the plunger, wherein an actuator extends from the housing, wherein the actuator is configured to apply pressure to the spring to disengage the lower receiving member such that the plunger can move axially through the throughbore without rotation.