Patent ID: 8250909

Claim:
A pressure measuring device for disposition in a chamber of an internal combustion engine, comprising: a housing; a force transmitting element that extends partially out of the housing; a fixing element; a pressure sensor situated in an internal space of the housing, the pressure sensor being, on the one hand, effectively connected at least indirectly to the force transmitting element in order to acquire a charging of the force transmitting element resulting from a pressure prevailing in the chamber in order to determine the pressure prevailing in the chamber, and the pressure sensor being, on the other hand, at least indirectly supported on the fixing element; a sensor cage connected on the one hand at least indirectly to the force transmitting element and on the other hand connected at least indirectly to the fixing element, wherein the sensor cage is connected to the housing at least indirectly, at a connecting segment of the housing; and a spring-elastic element situated inside the housing and connected on the one hand at least indirectly to the force transmitting element and on the other hand connected at least indirectly to the sensor cage, wherein the fixing element has, for a compensation of expansion differences of components of the pressure measuring device, a thermal expansion that is matched to at least a thermal expansion of the sensor cage.