Patent ID: 7694573
Filing Date: 2010-04-13
Classification: D06F,G01L

Abstract:
1. An analogue position or correlated physical quantity transducer, comprising: a deformable membrane sensitive to hydraulic pressure; a casing accommodating therein the membrane; a first element engaged to the membrane so as to be mobile with at least one portion of the membrane in a predetermined direction (A); a second element fixed to the casing and operatively coupled with the first element to provide a signal variable according to the relative position of the first element with respect to the second element; a first adjusting element interposed between said first element and said portion of the membrane for varying, along said predetermined direction, the relative position of said first element with respect to the portion of the membrane; a spring preloadedly fitted between the casing and the membrane; a second adjusting element for adjusting a preload of the spring; a first abutting element which is integral with said casing and against which said membrane rests, under the preload of the spring, when the transducer is in a zero condition, wherein the membrane is undeformed in the zero condition; and a second abutting element opposite to said first abutting element in the predetermined direction, said contrast spring being arranged between said membrane and said second abutting element and urging said membrane against the first abutting element in the zero condition.