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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10400851 B1

PDFFull Text
Date of Patent:
Sep. 03, 2019

Filed:

Sep. 30, 2015

Tip clearance measurement of a rotary wing aircraft

Applicant:

Sikorsky Aircraft Corporation, Stratford, CT (US);

Inventors:

Maximilian August Koessick, Stuart, FL (US);

Michael J. Kostoss, North Branford, CT (US);

Eric Lucien Nussenblatt, Stamford, CT (US);

Justin Thomas, New Haven, CT (US);

Christopher Paul Butler, Frisco, TX (US);

Brandon Michael Cerge, West Palm Beach, FL (US);

Assignee:

SIKORSKY AIRCRAFT CORPORATION, Stratford, CT (US);

Attorney:

Cantor Colburn LLP

Primary Examiner:

Richard G Davis

Int. Cl.
CPC ...
B64C 27/08 (2006.01); F16F 15/02 (2006.01); B64C 27/10 (2006.01); B64C 27/12 (2006.01); B64C 27/14 (2006.01); B64C 13/04 (2006.01); B64C 13/18 (2006.01); B64C 27/82 (2006.01); G05D 1/08 (2006.01); B64C 13/50 (2006.01); B64C 27/57 (2006.01); G05D 1/02 (2006.01); B64C 27/00 (2006.01); B64D 39/00 (2006.01); B64D 39/06 (2006.01); B64C 27/80 (2006.01); G05D 1/00 (2006.01); B64D 35/06 (2006.01); F16H 37/02 (2006.01); B64C 27/51 (2006.01); B64C 27/52 (2006.01); B64C 27/32 (2006.01); B64C 27/33 (2006.01); B64C 27/473 (2006.01); B64C 27/48 (2006.01); B64C 27/16 (2006.01); B64C 1/00 (2006.01); B64C 19/00 (2006.01); B64C 27/54 (2006.01); B64C 27/78 (2006.01); B64C 27/467 (2006.01); B64C 7/00 (2006.01); B64D 45/02 (2006.01); F16D 13/52 (2006.01); F16D 13/72 (2006.01); F16D 13/74 (2006.01); G06F 19/00 (2018.01); F02C 9/28 (2006.01);
U.S. Cl.
CPC ...
F16F 15/02 (2013.01); B64C 1/0009 (2013.01); B64C 7/00 (2013.01); B64C 13/04 (2013.01); B64C 13/18 (2013.01); B64C 13/503 (2013.01); B64C 19/00 (2013.01); B64C 27/001 (2013.01); B64C 27/006 (2013.01); B64C 27/008 (2013.01); B64C 27/10 (2013.01); B64C 27/12 (2013.01); B64C 27/14 (2013.01); B64C 27/16 (2013.01); B64C 27/32 (2013.01); B64C 27/322 (2013.01); B64C 27/33 (2013.01); B64C 27/467 (2013.01); B64C 27/473 (2013.01); B64C 27/48 (2013.01); B64C 27/51 (2013.01); B64C 27/52 (2013.01); B64C 27/54 (2013.01); B64C 27/57 (2013.01); B64C 27/78 (2013.01); B64C 27/80 (2013.01); B64C 27/82 (2013.01); B64D 35/06 (2013.01); B64D 39/00 (2013.01); B64D 39/06 (2013.01); B64D 45/02 (2013.01); F16H 37/02 (2013.01); G05D 1/0077 (2013.01); G05D 1/0202 (2013.01); G05D 1/0816 (2013.01); G05D 1/0858 (2013.01); B64C 13/50 (2013.01); B64C 27/08 (2013.01); B64C 2027/004 (2013.01); B64C 2027/8209 (2013.01); B64C 2027/8227 (2013.01); B64C 2027/8236 (2013.01); B64C 2027/8263 (2013.01); B64C 2027/8272 (2013.01); B64C 2027/8281 (2013.01); B64C 2201/024 (2013.01); F02C 9/28 (2013.01); F05D 2220/329 (2013.01); F05D 2270/021 (2013.01); F16D 13/52 (2013.01); F16D 13/72 (2013.01); F16D 13/74 (2013.01); G05D 1/0204 (2013.01); G05D 1/08 (2013.01); G06F 19/00 (2013.01);
Abstract

An aircraft is provided including an airframe, an extending tail, and a counter rotating, coaxial main rotor assembly including an upper rotor assembly with an upper blade and a lower rotor assembly with a lower blade. A first antenna in one of upper blade and the lower blade, and a second antenna in the other of the upper blade and the lower blade. An oscillator to apply an excitation signal to the first antenna. A blade proximity monitor to monitor a magnitude of the excitation signal and an output signal from the second antenna to determine a distance between the upper blade and the lower blade.

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