公开(公告)号：EP1350082A4

公开(公告)日：2006-03-15

申请号：EP01986156

申请日：2001-12-12

Applicant: BELL HELICOPTER TEXTRON INC

Inventor： STAMPS FRANK BRADLEY ,  MARTIN RONNIE LEE ,  BRASWELL JR JAMES LEE

IPC: G01L7/06 ,  F16F7/10 ,  F16F7/112 ,  F16F9/32 ,  G01L7/08 ,  G01L19/10 ,  G01L19/12 ,  H01H35/34

CPC classification number: F16F9/3264 ,  G01L7/063 ,  G01L19/08 ,  G01L19/10 ,  G01L19/12

Abstract: A pressure indicator (106) according to the present invention monitors the pressure of the fluid in a vessel (102). One embodiment of the present invention comprises a closed pressurized gas volume (210) behind a dimpled metal diaphragm (208). In normal operation, the force of the fluid pressure acting on the external surface of the diaphragm (208) to hold the diaphragm (208) in a concave geometry. In the event of a sufficient loss of fluid pressure, the force of the gas pressure acting on the internal surface of the diaphragm (208) will overcome the force of the fluid pressure acting on the external surface of the diaphragm (208), thereby moving the diaphragm (208) into a convex geometry. A viewing window (110) disposed in the side of the vessel (102) can be used to view the pressure indicator (106) and determine the shape of the indicator diaphragm (208).