Machine element or mechanism – Gearing – Plural power paths to and/or from gearing
Patent
1978-09-27
1981-06-16
Herrmann, Allan D.
Machine element or mechanism
Gearing
Plural power paths to and/or from gearing
64 28R, 74469, 74713, 244213, F16H 144, F16D 900, G05G 700
Patent
active
042730066
ABSTRACT:
A mechanical power transmission apparatus, of the differential gear type, for actuating an airplane control surface requiring two independent actuator inputs to a single control surface. Predetermined, proportionately variable, asymmetric loads between the two actuators are accomodated by a load sensitive brake in conjunction with a fuse link which fails in the event of single actuator or drive means failure. The fuse link is provided by employing a shear pin to attach the pinion gear in the differential to the pinion shaft. The shear pin failure strength in conjunction with the load variable brake determines the allowable differential torque between the two driven bevel gears.
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Herrmann Allan D.
Jason Walter J.
Loef Paul T.
McDonnell Douglas Corporation
Royer Donald L.
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