Jack Robert Auld,Brian William McDonnell,Barry Lynn Wheatley
申请号：
US12976038
公开号：
US20120165734A1
申请日:
2010.12.22
申请国别(地区):
US
年份:
2012
代理人:
摘要：
Devices, systems, and associated methods that facilitate the injection and/or aspiration of precisely controlled volumes of fluids at precisely controlled rates are provided. In some implementations, an apparatus may include a syringe and a lead screw connected to a plunger of the syringe. A ratchet gear may be connected to the lead screw. A mechanism may also be included to oscillate a frame in a direction perpendicular to a longitudinal axis of the lead screw such that one or more pawls of the frame engage the teeth of the ratchet gear in a manner that results in rotation of the ratchet gear in a single direction for controlled linear displacement of the plunger.
