Patent ID: 9157533
Filing Date: 2015-10-13
Classification: F16K,Y10T

Abstract:
1. A multi-vane throttling valve for a vacuum process chamber having a throttle chamber body with a through-opening, an inside exposed to the vacuum process chamber and an outside exposed to atmospheric pressure, a plurality of rotatable vanes mounted within the through-opening for controlling a flow of gases through the through-opening, and a drive mechanism for rotating the plurality of rotatable vanes, the valve comprising: a reciprocal vane pivotally connected to a back side of each of the plurality of rotatable vanes and extending backwardly away from each of the respective rotatable vane; and a stationary reciprocal vane angling assembly fixed in a predefined position, the vane angling assembly having an assembly pin extending transversely toward the reciprocal vane a predefined distance sufficient to support the reciprocal vane; whereby the stationary angling assembly causes the reciprocal vane to pivot in a range between a substantially parallel position with the respective rotatable vane and a transverse position with the respective rotatable vane when the respective rotatable vane is rotated to control the flow of gases through the through-opening.