Patent ID: 9513180
Filing Date: 2016-12-06
CPC Classification: A61M,G01L

Claim Text:
1. A pressure indicating device, comprising: a housing including: a piston movably disposed within the cylindrical bore, a first variable volume defined by the internal surface, the piston, and the first end member of the housing; a second variable volume defined by the internal surface, the piston, and the second end member of the housing, such that the second variable volume is sealed between the piston and the second end member of the housing; an inlet port defined by the first end member of the housing and in fluid communication with the first variable volume; a piston bypass channel disposed outside the cylindrical bore and in fluid communication with the inlet port; and an outlet port defined by the second end member of the housing, the outlet port in fluid communication with the piston bypass channel, wherein the piston is configured to move and be located along the longitudinal axis of the cylindrical bore according to only a fluid pressure in the first variable volume and a fluid pressure in the second variable volume.