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INJECTOR APPARATUS HAVING A CLUTCH TO INHIBIT FORWARD MOVEMENT OF THE PLUNGER
专利权人:
OWEN MUMFORD LIMITED
发明人:
Toby COWE
申请号:
US15206001
公开号:
US20160317752A1
申请日:
2016.07.08
申请国别(地区):
US
年份:
2016
代理人:
摘要:
An injector apparatus includes a housing (101, 102) for a cartridge or syringe, a plunger (40) for cooperating in use with the cartridge or syringe to express successive doses, a dose setting arrangement (16, 20) to select a dose volume, and a drive mechanism (22, 24) releasable to advance the plunger in respective predetermined increments of magnitude to express the successive doses. The drive mechanism includes a drive spring (22) for imparting movement directly or indirectly to the plunger (40), and the dose setting arrangement includes a dose setting element (16) moveable in a dose setting routine to define a magnitude of an increment of movement of the plunger for a given dose. The drive mechanism further includes a clutch arrangement (56) operable during the dose setting routine to inhibit forward movement of the plunger and/or to isolate the dose setting element from the force of the drive spring.
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