Patent ID: 7497127

Claim:
A pressure-difference pickup, comprising: a hydraulic body, in which an overload chamber with an overload membrane is present, with said overload membrane dividing said overload chamber into a first half-chamber and a second half-chamber, said first half-chamber is in communication with a first hydraulic measuring path, which extends between a first pressure intermediary and a first side of a pressure-difference measuring cell, and the second half-chamber is in communication with a second hydraulic path, which extends between a second pressure intermediary and a second side of the pressure measuring cell; and a first hydraulic overload element having a snap-disc behavior relative to an excess pressure from said first hydraulic measuring path; wherein: said first hydraulic balancing path extending in parallel with said first hydraulic measuring path, and said first hydraulic overload element and said first hydraulic balancing path are arranged between at least said first half-chamber and said first hydraulic measuring path.