Automatic clutch for a door latch handle

Details Automatic clutch for a door latch handle Automatic clutch for a door latch handle

1990-04-05

1997-06-10

Peters, Jr., Joseph F.

Aeronautics and astronautics

Aircraft structure

Details

2441294, 292304, 74 96, 49215, 192 71, B64C 114

Patent

active

056368143

ABSTRACT:
A clutch for an interior latch handle of a plug-type airplane door is described which decouples the handle from the latch-operating linkage so the handle will not be backdriven into the passenger space when the exterior latch handle is operated to open the door from outside the airplane. The clutch includes a probe mounted on the base of a handle mechanism assembly in line with the handle, and a pawl pivotally mounted in the handle and disposed to engage a lug splined to the handle shaft and torsionally coupled to the latch. When the handle is in its "home" or "closed" position, the probe engages a roller on the end of an arm connected to the pawl and rotates the pawl away from the lug so that the handle shaft will not backdrive the handle into the passenger space when the exterior latch handle is operated to unlatch the door. When the handle is moved away from the probe, the pawl engages the lug to establish two-way torsional coupling between the handle and the latch.

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patent: 4848034 (1989-07-01), Pace

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