Inventor
D'ANNA FRANK P
US22 patents
⚠️ This page may combine multiple inventors who share the name “D'ANNA FRANK P”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SIKORSKY AIRCRAFT CORP
15 patentsUS7621480B2Nov 24, 2009
De-rotation system for a counter-rotating, coaxial rotor hub shaft fairing
SIKORSKY AIRCRAFT CORP42 citations91
US7607607B2Oct 27, 2009
De-rotation system suitable for use with a shaft fairing system
SIKORSKY AIRCRAFT CORP20 citations91
US9616996B2Apr 11, 2017
Stiff inplane elastomeric rotorhead
SIKORSKY AIRCRAFT CORP2 citations73
US9718541B2Aug 1, 2017
Swashplate apparatus
SIKORSKY AIRCRAFT CORP6 citations72
US9452830B2Sep 27, 2016
Constant velocity drive for tilt rotor assembly
SIKORSKY AIRCRAFT CORP3 citations72
US10696386B2Jun 30, 2020
Rigid rotor head with tension torsion (TT) strap retention
SIKORSKY AIRCRAFT CORP3 citations69
US10604246B2Mar 31, 2020
Rotorcraft rotor assemblies
SIKORSKY AIRCRAFT CORP3 citations69
US10933992B2Mar 2, 2021
Blade fold system using flap hinge
SIKORSKY AIRCRAFT CORP1 citations62
US7798442B2Sep 21, 2010
Rotor assemblies having automatic blade folding systems
SIKORSKY AIRCRAFT CORP5 citations61
US9315265B2Apr 19, 2016
Adjustable scissor control link
SIKORSKY AIRCRAFT CORP2 citations60
US9415866B2Aug 16, 2016
Low drag rotor system
SIKORSKY AIRCRAFT CORP1 citations52
US10543914B2Jan 28, 2020
Non-loaded manual blade fold assembly
SIKORSKY AIRCRAFT CORP0 citations51
US10189564B2Jan 29, 2019
Non-loaded manual blade fold assembly
SIKORSKY AIRCRAFT CORP0 citations51
US10358212B2Jul 23, 2019
Aircraft rotor assembly with composite laminate
SIKORSKY AIRCRAFT CORP0 citations41
US10752347B2Aug 25, 2020
Rotor blade pitch horn assembly
SIKORSKY AIRCRAFT CORP0 citations40
UNITED TECHNOLOGIES CORP
5 patentsUS5092738AMar 3, 1992
Flexbeam helicopter rotor with improved snubber-vibration damper between the torque tube and the flexible spar member
UNITED TECHNOLOGIES CORP74 citations96
US5431540AJul 11, 1995
Main rotor pitch control rod subassembly
UNITED TECHNOLOGIES CORP56 citations95
US5249926AOct 5, 1993
Blade retention pin system for a helicopter blade folding system
UNITED TECHNOLOGIES CORP34 citations92
US5400878AMar 28, 1995
Rotary viscous damper
UNITED TECHNOLOGIES CORP23 citations86
US4493612AJan 15, 1985
Axially slideable plenum for circulation control aircraft
UNITED TECHNOLOGIES CORP7 citations73