Joan E. Spiegel;Samuel Duffley;Alexander H. Slocum;Alexander Slocum, JR.;Adrienne Watral
发明人:
Joan E. Spiegel,Alexander H. Slocum,Adrienne Watral,Samuel Duffley,Alexander Slocum, JR.
申请号：
US13528167
公开号：
US20120312300A1
申请日:
2012.06.20
申请国别(地区):
US
年份:
2012
代理人:
摘要：
A syringe having an internal pressure gauge comprises a syringe barrel； a piston within the barrel； a spring coupled to the piston at a first position of the spring, the spring having a second portion that is movable in response to fluid pressure within a syringe cavity； and a pressure gauge having an indicator correlated to a plurality of positions of the second portion of the spring to indicate a pressure of a fluid. The spring can be a bellows. The first portion of the spring can be coupled to the piston to form a sliding seal with an inner wall of the syringe, and the second portion of the spring can move longitudinally within the syringe without sealing contact.
