Patent ID: 8397577
Filing Date: 2013-03-19
Classification: G01L

Abstract:
1. A pressure measuring device, comprising: a resilient rolling diaphragm pressure sensor element having an open end and an opposite closed end, said pressure sensor element comprising generally concentric inner and outer substantially tubular portions and a rolling diaphragm portion connecting the inner and outer substantially tubular portions, said outer substantially tubular portion extending from the open end of the pressure sensor element and said inner substantially tubular portion defining the closed end of the pressure sensor element, wherein the pressure sensor element is tapered over at least a portion of its length or has a wall thickness that varies over at least a portion of its length to tune its response to pressure; and a supporting structure having a pressure indicating scale, said supporting structure holding the pressure sensor element such that the open end of the pressure sensor element is in communication with a fluid whose pressure is to be measured and pressure applied by the fluid causes the pressure sensor element to expand axially and the rolling diaphragm portion of the pressure sensor element to be visibly displaced relative to the pressure indicating scale by a distance related to the pressure applied by the fluid.