HANSON, IAN B.,BENTE IV, PAUL F.,DESTEFANO, MARK A.
申请号：
CA3074354
公开号：
CA3074354A1
申请日:
2017.08.30
申请国别(地区):
CA
年份:
2019
代理人:
摘要：
A controlled delivery drive mechanism includes a drive housing (130)； a spring (122) initially retained in an energized state and bearing on a piston (110) configured to translate a plunger seal (60) in a barrel (58) of a drug container (50)； and a tether (580) connected between the piston (1 10) and a winch drum (520) to restrain the free expansion of the spring (122). The drive mechanism (100) may include a gear assembly and an escapement regulating mechanism (500) to control the rotation of the gear assembly to release the tether from the winch drum. Escapement regulating mechanism (500) includes a lever (564), escape wheel (562), and balance wheel (566) with hair spring (568) and motor or solenoid actuator (570). Lever has pins (564)； and prong (564C) moveably engaging a post (566A) and an impulse pin (566B) of a balance wheel (566).
