Patent ID: 9239336
Filing Date: 2016-01-19
CPC Classification: B08B,B23P,G01L,G01P,Y10T

Claim Text:
1. A method for clearing a blockage in a pitot pressure line or a static pressure line of a duct of a pressure sensor, the duct comprising a first portion, the pitot or static pressure line, and a second portion, the first portion having an open end and a further end; the open end being open to a fluid; the further end being connected to the second portion such that the fluid is permitted to flow between the first portion and the second portion during pressure measurement; the second portion having a first opening and a second opening, the further end being connected to the first opening, the second opening being connectable to a pressure transducer; the method comprising the steps of: arranging a non-return valve being connected to the first opening of the second portion such that the non-return valve is positioned at or proximate to the further end of the first portion; and upon application of a suction force to the first portion at the open end, fluid flows into the first portion via the non-return valve from outside the duct, and through the first portion from the further end to the open end; applying a suction force to the first portion at the open end so as to remove the blockage from the first portion; and upon application of a suction force to the first portion at the open end, the non-return valve acts to reduce effects of the suction force on the pressure transducer.