Patent ID: 7059581
Filing Date: 2006-06-13
Classification: F23N,Y10T

Abstract:
1. A valve comprising a housing ( 2 ) defining a valve chamber ( 3 ) and a valve seat ( 10 , 15 ) in the valve chamber ( 3 ), a fluid inlet ( 5 ) to the valve chamber ( 3 ), and a fluid outlet ( 6 , 7 ) from the valve chamber ( 3 ), the fluid outlet ( 6 , 7 ) communicating with the fluid inlet ( 5 ) through a fluid passageway ( 13 , 16 ) defined by the valve seat ( 10 , 15 ), a valving member ( 21 , 22 ) co-operable with the valve seat ( 10 , 15 ) for throttling fluid flow through the fluid passageway ( 13 , 16 ), a drive means ( 35 ) coupled to the valving member ( 21 , 22 ) for progressively operating the valving member ( 21 , 22 ) between a closed position with the valving member ( 21 , 22 ) engaging the valve seat ( 10 , 15 ) for closing the fluid passageway ( 13 , 16 ), and a fully open position with the valving member ( 21 , 22 ) spaced apart from the valve seat ( 10 , 15 ) for opening the fluid passageway ( 13 , 16 ), wherein a synchronizing means ( 78 , 80 , 83 , 84 ) is provided for synchronizing the drive means ( 35 ) with the valving member ( 21 , 22 ), so that the absolute amount of throttling of the fluid through the fluid passageway ( 13 , 16 ) by the valving member ( 21 , 22 ) is directly determined by the amount of drive imparted to the valving member ( 21 , 22 ) by the drive means ( 35 ).