Traversing hoists – Having horizontally swinging boom or bridge – And means to swing boom horizontally
Patent
1990-01-24
1992-01-07
Braun, Leslie A.
Traversing hoists
Having horizontally swinging boom or bridge
And means to swing boom horizontally
212245, 212253, 74421A, 475149, B66C 2384
Patent
active
050782851
ABSTRACT:
In an excavating machine having a ring gear and a rotating frame including a top and bottom plate, an assembly for rotating the frame relative to the ring gear includes a plurality of drive units, each of the drive units is mounted to the bottom plate and is disposed between the top and bottom plates of the rotating frame. Each of the drive units further includes a pinion extending below the bottom plate and adjacent to the ring gear for driving engagement with the ring gear.
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Ehret James A.
Geyer Allan E.
Malik Dev R.
McCoy Richard W.
Braun Leslie A.
Dresser Industries Inc.
Wittels Daniel
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