Patent ID: 8528583

Claim:
A pneumatic amplifier, comprising: a supply air valve with a supply input connected to a pneumatic supply, a signal input for receiving a pneumatic input signal, a signal output for transmitting an amplified pneumatic output signal, a valve member for continuously opening or cutting off a pneumatic connection between the supply input and the signal output, and a diaphragm coupled with the valve member and which has one side exposed to the pneumatic input signal and an opposite side facing away from the signal input being exposed to the amplified pneumatic output signal; an exhaust air valve having a control input, a bleed output for bleeding or exhausting the exhaust air valve, a valve member for continuously opening or cutting off a pneumatic connection between said control input and the bleed output, a signal input separate from the bleed output for receiving the same pneumatic input signal which is also applied at the signal input of the supply air valve, the control input being connected to the supply air valve signal output to receive the amplified pneumatic output signal, and the signal input being pneumatically separated at all times by a diaphragm from the control input and the bleed output; the bleed output of the exhaust air valve being exposed to atmosphere or to approximately zero bar; and the respective valve members of the supply air valve and the exhaust air valve being structurally separated from one another.