Helicopter rotor backup damper system

Details Helicopter rotor backup damper system Helicopter rotor backup damper system

1985-02-04

1987-09-22

Garrett, Robert E.

Fluid reaction surfaces (i.e., impellers)

Sustained ancillary movement of rotary working member

Lead-lag type rotor blade movement

416140, 188314, B64C 2751

Patent

active

046952268

ABSTRACT:
In a system having many unequal-area dampers (16) and a common main accumulator (34) for providing positive hydraulic pressure thereto, a shutoff valve (64) and a backup accumulator (62) are provided for each damper (16). In the event of a loss of pressure in the system, the shutoff valve (64) isolates each damper (16) and associated backup accumulator (62) from the rest of the system so that positive hydraulic pressure is provided to each associated damper (16).

REFERENCES:
patent: 2681044 (1954-06-01), Eggenberger
patent: 3144082 (1964-08-01), Grant et al.
patent: 3212584 (1965-10-01), Young
patent: 3303887 (1967-02-01), Pfleiderer
patent: 3972396 (1976-08-01), Bochnak
patent: 4084668 (1978-04-01), Rybicki
patent: 4305284 (1981-12-01), Rubicki et al.
patent: 4521202 (1985-06-01), Dakahama

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