Patent ID: 9651048
Date: 2017-05-16
CPC Classifications: F04C

Claim:
1. A gas inlet valve for a compressor, comprising: a housing which comprises a gas inlet portion for drawing in a gas and a gas outlet portion for conveying the drawn-in gas to a compressor block of the compressor, which gas outlet portion can be put in operative fluid communication with the gas inlet portion as needed; a valve device which is arranged between the gas inlet portion and the gas outlet portion and comprises a valve body and a valve seat, the valve body resting against the valve seat in a sealing manner when the valve device is in a closed operating state, and the valve body being lifted from the valve seat when the valve device is in an open operating state; a piston device which comprises a first piston portion and a second piston portion which is different from the first piston portion, the first piston portion being displaceably guided in a first cylinder portion of the housing and the second piston portion being displaceably guided in a second cylinder portion of the housing which is different from the first cylinder portion; and a piston rod which is displaceably mounted in the housing and mechanically couples the valve body of the valve device to the piston device, a fluid line putting a first cylinder chamber of the first cylinder portion in operative fluid communication with the gas outlet portion in such a manner that the first cylinder chamber is in operative fluid communication with the gas outlet portion via the fluid line in an operating state in which the valve body rests against the valve seat, it being possible to apply a control pressure to a second cylinder chamber of the second cylinder portion in order to lift the valve body from the valve seat, wherein an active surface of the first piston portion is larger than an active surface of the second piston portion and wherein the second piston portion is arranged on an end face of the first piston portion.