Richard H. Theriault,Andrew Goddard,Orlando Soto,Sean J. Albert
申请号：
US14071495
公开号：
US20140066858A1
申请日:
2013.11.04
申请国别(地区):
US
年份:
2014
代理人:
摘要：
Vacuum-operated safety syringes designed to prevent an accidental needle prick, where the needle of the syringe is retracted after use into a vacuum created within the hollow plunger and/or the syringe barrel of the syringe. Retraction of the needle assembly is accomplished from minimal moving parts according to an exceedingly simple design. In some embodiments, one or more one-way valves prevent airflow into the interior of the syringe barrel and thereby maintain the vacuum that is created during the act of injection. In some embodiments, the plunger of the safety syringe is manufactured to be pre-conditioned at negative pressure.
