Patent ID: 7238000
Filing Date: 2007-07-03
Classification: F01D,Y10S

Abstract:
1. A speed governor for a pneumatic high speed motor, wherein the pneumatic high speed motor includes a stator housing, a rotor journalled in said stator housing, and a pressure air inlet passage, said speed governor comprising: a valve element that is shiftable between an open position and a closed position for controlling pressure air flow through said inlet passage; and a spring which continuously biases said valve element toward said open position; wherein said valve element comprises an activating surface which is exposed to an output pressure of an air compressor that is driven by said rotor such that the output pressure is responsive to a speed of said rotor; and wherein the output pressure of the air compressor generates an activating force, which is responsive to the output pressure, on said activating surface of said valve element such that, when the speed of the rotor exceeds a desired operating speed level, the activating force shifts said valve element toward said closed position against the bias force of said spring.