Patent ID: 7735515
Filing Date: 2010-06-15
Classification: F16K,Y10T

Abstract:
1. A valve system for controlling fuel flow comprising: a) a fuel-flow control device comprising a valve and a shaft for actuating the valve; b) an actuator for rotating the shaft; c) an apparatus for sensing the condition of the fuel-flow control device comprising: a transmitter remote from the valve arranged to transmit a signal towards the valve; a receiver remote from the valve arranged to receive the signal, the signal received by the receiver conveying information concerning the condition of the fuel-flow control device, and a signal reflector for reflecting signals from the transmitter to the receiver, the signal reflector being arranged to rotate with movement of the valve, the shaft having a first and a second end, the shaft having an axial length from the first end of the shaft to the second end of the shaft, the shaft including at least a part of a path along which the signal is arranged to travel from the transmitter to the receiver, so that, in use, a signal travels for at least part of the axial length of the shaft in a direction generally defined from the first end of the shaft to the second end.