Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1993-04-12
1995-06-27
Barefoot, Galen L.
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
92 23, 92117A, 292144, B64C 356
Patent
active
054273293
ABSTRACT:
A latch pin actuator (34) for use in connection with an aircraft (10) having folding wings or wing tips (12). The actuator (34) includes housing (38) mountable to a wing portion (12, 16). A latch pin (21) in the form of a hydraulic cylinder is slidably mounted within the housing (38) and on a piston (44) which is fixed to the housing (38). Variable volume fluid chambers (46, 48) are defined in the cylinder body of the latch pin (21). A primary lock member (58) is movable between locked and unlocked positions such that retraction of the latch pin (21) is prevented when the primary lock (58) is in a locked position. In preferred form, a hydraulic actuator (78) is used to move the primary lock member (58) between locked and unlocked positions and to operate a sequencing valve which delivers hydraulic pressure to a chamber (48) of the latch pin (21) after actuation of the primary lock (58). The latch pin actuator (34) may also include a secondary lock member (60) which can be ganged to operate in unison with adjacent latch pin actuators (34).
REFERENCES:
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patent: 4778129 (1988-10-01), Byford
Renzelmann Michael E.
Smith Mark H.
Stramat Gregory T.
Barefoot Galen L.
Bellamy Glenn D.
The Boeing Company
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