Patent ID: 6681797
Filing Date: 2004-01-27
Classification: G05D,Y10T

Abstract:
Pressure transducer for producing a controlled pressure, comprisinga valve with an inlet for applying compressed air, the valve comprising a valve block and a valve seat, a motor for adjusting the position of the valve block with regard to the valve seat, means for transforming a rotating motion of a shaft of the motor into a longitudinal movement of the valve block, a pressure sensor, an electronic controller for regulating a direction of rotation and a speed of the motor based on a signal delivered by the pressure sensor and a set value for the pressure, and a spring inserted between the shaft of the motor and the valve block for effecting a varying mechanical load on the motor in dependence on the position of the valve block, wherein an increasing mechanical load on the motor effects an increasing reduction in the speed of the motor in comparison with its speed in a no-load condition.