Main rotor pitch control rod assembly with passive locking featu

Details Main rotor pitch control rod assembly with passive locking featu Main rotor pitch control rod assembly with passive locking featu

1991-08-30

1992-12-29

Kundrat, Andrew V.

Joints and connections

Structurally installed in diverse art device

403 46, 403 43, F16D 100

Patent

active

051746778

ABSTRACT:
Main rotor pitch control rod assemblies on helicopters constitute means for ranslating an aviator's control impulses in the cockpit to the main rotor blades. Pitch control rod assemblies typically include means for locking the assembly into a predetermined attitude setting. The setting may be held by locking nuts. This invention provides a passive locking means using spring tension to maintain the desired setting if the locking nuts loosen due to stress loads or improper torquing during maintenance. The invention also provides passive means for maintaining expansive stress within the control rod to prevent distortion of the assembly under compressive loads.

REFERENCES:
patent: 1039017 (1912-09-01), Bonness
patent: 1347963 (1921-04-01), Stevenson
patent: 2810595 (1957-10-01), Purdy
patent: 2920912 (1960-01-01), Hess
patent: 3239930 (1966-03-01), Violleau
patent: 3786695 (1974-01-01), Barrett
patent: 4012967 (1977-03-01), Warren
patent: 4418583 (1983-12-01), Taig

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