Brakes – Operators – Speed-responsive
Patent
1993-04-28
1996-01-16
Graham, Matthew C.
Brakes
Operators
Speed-responsive
F16D 1500
Patent
active
054840430
ABSTRACT:
In order to prevent serious damage to a flight control system in a failure mode, a failure protection unit includes an input shaft connected to a shaft of the flight control system with the input shaft normally being operably associated with a plunger having a brake hub integral therewith for rotational driven movement of the plunger and the brake hub through the input shaft. The plunger and the brake hub are movable relative to the input shaft, and a brake reaction plate is positioned within a housing in normally spaced relation to the brake hub. The brake hub is biased by a spring in a direction toward the brake reaction plate and the plunger is biased by the spring in a direction away from the input shaft. The plunger is normally locked against movement by a detent which resists movement of the plunger away from the input shaft and movement of the brake hub toward the brake reaction plate. With these features of construction, a trip mechanism initiates engagement of the brake hub with the brake reaction plate responsive to an overspeed condition for the shaft of the flight control system by disabling the detent to thereby allow the spring to cause movement of the brake hub toward the brake reaction plate and movement of the plunger away from the input shaft.
REFERENCES:
patent: 2362676 (1944-11-01), Stechbart
patent: 2951540 (1960-09-01), Hawkins
patent: 4318304 (1982-03-01), Lang
patent: 4603594 (1986-08-01), Grimm
patent: 4685550 (1987-08-01), Metcalf
patent: 4987788 (1991-01-01), Bausch
patent: 5137126 (1992-08-01), Magnaval et al.
Quick David C.
Russ David E.
Graham Matthew C.
Sundstrand Corporation
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