Rotary kinetic fluid motors or pumps – With control means responsive to non-cyclic condition... – Casing – runner – or shaft position or extent of motion...
Reexamination Certificate
2011-08-23
2011-08-23
Kershteyn, Igor (Department: 3745)
Rotary kinetic fluid motors or pumps
With control means responsive to non-cyclic condition...
Casing, runner, or shaft position or extent of motion...
C415S118000, C415S126000, C415S127000, C415S128000, C415S173100, C416S061000
Reexamination Certificate
active
08002517
ABSTRACT:
Sensors (32, 52, 72) for determining a gap between a conductive member (34, 54, 74) such as a blade in a gas turbine engine and a seal segment (31, 51) are known to use capacitive variants in order to create an electrical signal indicative of the gap width. Thermal disparities can create problems with regard to sensor aging and accuracy. By creating a sensor incorporating a metal rod (33, 53, 74) typically integrally formed or associated with the seal segment (31, 51) and coupled through inductive coupling loops (35, 36; 55, 56; 75) it is possible to create a tuned circuit with a Q value which is more stable and therefore acceptable with regard to producing more accurate results at elevated temperatures with less problems with regard to thermal disparities.
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Lewis Leo V.
Mansfield Lee
Razzell Anthony G.
Kershteyn Igor
Oliff & Berridg,e PLC
Rolls-Royce plc
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