Decoupler shaft and air turbine starter having such a decoupler

Details Decoupler shaft and air turbine starter having such a decoupler Decoupler shaft and air turbine starter having such a decoupler

1988-11-07

1989-10-03

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

Including shaft transmission train, brake, clutch, or...

Brake or clutch

60 39142, 192 56R, 74 7C, 403 32, F01D 1512

Patent

active

048712965

ABSTRACT:
A torque limiting decoupler shaft transmits driving torque in a first sense without torque limiting action. However, torque applied to the shaft in a reverse sense opposite the driving torque results in an axial separating force between two portions of the decoupler shaft. When the reverse torque reaches a certain level a frangible tensile bar member fractures to permit decoupling of the shaft portions. A component of the shaft prevents undesirable recoupling of the shaft portions while also insuring that the relatively rotating portions of the shaft do not flail. An air turbine starter includes such a decoupler shaft.

REFERENCES:
patent: 504479 (1893-09-01), Ross
patent: 2174342 (1939-09-01), Greulich
patent: 2291407 (1942-07-01), Paul
patent: 2983122 (1961-05-01), Polzin
patent: 3521505 (1970-07-01), Sebring
patent: 4257147 (1981-03-01), Moss
patent: 4385894 (1983-05-01), Sharpe et al.
patent: 4768634 (1988-09-01), Quick et al.

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