Sarnath Chattaraj,Poonam S. Gulati,Lance P. Hoffman,Kiem Dang
申请号：
US12972263
公开号：
US08574201B2
申请日:
2010.12.17
申请国别(地区):
US
年份:
2013
代理人:
摘要：
A fluid syringe of the type used with fluid infusion devices is presented here. The fluid syringe generally includes a barrel, a piston, and a check valve seal. The barrel has an interior wall and a sealed main fluid chamber. The piston is slidably coupled within the barrel, and the piston has a piston seal forming an interference fluid seal against the interior wall. The check valve seal is coupled to the piston, and it is located between the piston seal and the main fluid chamber. The check valve seal forms an interference fluid seal against the interior wall when the piston is unloaded, and it disengages the interior wall to allow gas flow from the main fluid chamber toward the piston seal when the piston is loaded.
