Bridges – Gangway – ramp – or dock leveler – Attached
Patent
1991-11-18
1993-09-07
Neuder, William P.
Bridges
Gangway, ramp, or dock leveler
Attached
2441371, B64D 900
Patent
active
052417220
ABSTRACT:
A ramp system in a first embodiment incorporates a fore and an aft ramp section interconnected by a spindle which permits both pitch and roll movement of the aft section relative to the fore section. The fore section is hingedly connected to an aircraft structure at an opening thereof so that the fore section is capable of pitch movement relative to the aircraft. A set of hydraulic actuators provide controlled movement to the sections and additionally secure the sections in their desired positions. A set of rollers and curved tracks on adjoining portions of the sections both provide secure interconnection of the sections and prevent yaw movement of the aft section relative to the fore section. Rotation of the aft section relative to the fore section allows quick and simple disconnection and removal of the aft section and thereby provides interchangability with alternate aft sections adapted to provide the aircraft with alternate functional capabilities. The second embodiment is essentially similar to the first embodiment except that it utilizes a ramp which is directly connected to an aircraft structure via the spindle and set of rollers and tracks so that the ramp is removeable from the aircraft structure and interchangeable with other ramps.
REFERENCES:
patent: 3128068 (1964-04-01), Pauli
patent: 3147942 (1964-09-01), Griffith
patent: 3538528 (1970-11-01), Porter et al.
patent: 4032092 (1977-06-01), Day
patent: 4039163 (1977-08-01), Shorey
patent: 4235399 (1980-11-01), Shorey
patent: 4832286 (1989-05-01), Brookes
Rawdon Blaine K.
Rohrlick Myles A.
McDonnell Douglas Corporation
Neuder William P.
Scholl John P.
Stout Donald E.
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