Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Reexamination Certificate
2005-12-23
2010-06-15
Rivell, John (Department: 3753)
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
C116S277000, C073S001790, C073S114260
Reexamination Certificate
active
07735515
ABSTRACT:
A valve system both controls fuel flow by means of a valve and senses the condition of the valve. The valve is actuated by an actuator via a rotatable shaft. Light is transmitted by a laser diode, via a polarising filter (which is mounted to rotate with the shaft), down the shaft, and is reflected by a mirror which directs the light back up the shaft via the filter to a receiver, which is able to detect different directions of polarisation of the light received. The polarisation of the light received by the receiver indicates whether the valve is open or shut. If no light is received a fault is deemed present. Thus, the condition of the valve is checked directly by means of an apparatus remote from the valve and the fuel.
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Drawing of Valve Actuator System—Admitted Prior Art.
Pilkington Paul James
Ward Michael David
Airbus UK Limited
McCalister William
Patterson Thuente Christensen Pedersen , P.A.
Rivell John
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