Inventor
FERRIS DONALD L
22 patents
⚠️ This page may combine multiple inventors who share the name “FERRIS DONALD L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
UNITED TECHNOLOGIES CORP
19 patentsUS4244677AJan 13, 1981
Cross-beam helicopter rotor with readily replaceable snubber
UNITED TECHNOLOGIES CORP69 citations95
US4714450ADec 22, 1987
Elastomeric high torque, constant velocity joint
UNITED TECHNOLOGIES CORP27 citations92
US4688993AAug 25, 1987
Tangential link swashplate centering member
UNITED TECHNOLOGIES CORP69 citations92
US4373862AFeb 15, 1983
Rotor blade shaft integrity monitoring system
UNITED TECHNOLOGIES CORP44 citations92
US4299538ANov 10, 1981
Cross beam rotor
UNITED TECHNOLOGIES CORP30 citations92
US4439106AMar 27, 1984
Rotor blade shaft integrity monitoring system
UNITED TECHNOLOGIES CORP32 citations90
US4804315AFeb 14, 1989
Composite helicopter swashplate
UNITED TECHNOLOGIES CORP24 citations88
US4797064AJan 10, 1989
Composite helicopter rotor hub
UNITED TECHNOLOGIES CORP22 citations82
US4284387AAug 18, 1981
Blade fold restraint system
UNITED TECHNOLOGIES CORP28 citations82
US4235570ANov 25, 1980
Elastomeric helicopter rotor load reaction system
UNITED TECHNOLOGIES CORP25 citations81
US4178130ADec 11, 1979
Helicopter rotor having lead-lag damper operable with pitch and flap decoupling
UNITED TECHNOLOGIES CORP22 citations81
US4047838ASep 13, 1977
Blade pitch control mechanism for helicopters
UNITED TECHNOLOGIES CORP25 citations81
US4569629AFeb 11, 1986
Helicopter gimbal rotor
UNITED TECHNOLOGIES CORP19 citations80
US4676669AJun 30, 1987
Tailoring tilt in an elastomeric high torque, constant velocity joint
UNITED TECHNOLOGIES CORP8 citations74
US4575358AMar 11, 1986
Accommodating axial load in an elastomeric high torque, constant velocity joint
UNITED TECHNOLOGIES CORP17 citations74
US4645423AFeb 24, 1987
Tension/compression rod arrangement for damping helicopter rotor blade oscillations
UNITED TECHNOLOGIES CORP10 citations73
US4588355AMay 13, 1986
Flexible swashplate centering member
UNITED TECHNOLOGIES CORP14 citations72
US4242047ADec 30, 1980
Adjustable bearing centering means for helicopter rotor elastomeric bearings
UNITED TECHNOLOGIES CORP2 citations63
US4668115AMay 26, 1987
Helicopter rotor spindle retention assembly
UNITED TECHNOLOGIES CORP6 citations54