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PROCESS AND AUTOINJECTOR DEVICE FOR INJECTIONS WITH INCREASED PATIENT COMFORT
专利权人:
发明人:
William G. Atterbury,Douglas E. Boyd
申请号:
US15742507
公开号:
US20180200442A1
申请日:
2016.07.06
申请国别(地区):
US
年份:
2018
代理人:
摘要:
The invention provides methods and apparatus for injecting a medicine, especially a highly viscous medicine. Conventional methods and apparatus for injecting viscous medicines suffers from a variety of problems such as excessive force during the initial needle insertion and initial injection. In an inventive method, during the initial phase of the injection, energy is stored in a torsion spring that is subsequently released during a later stage of the injection. The present invention also provides for an improved autoinjector especially via the use of a combination compression and torsion spring that powers the injection through controlling force applied to plunger via a screw flange or nut having pins that ride in a prescribed path down the length of the autoinjector.
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