Bridge section shifting drive for a bridge laying apparatus

Details Bridge section shifting drive for a bridge laying apparatus Bridge section shifting drive for a bridge laying apparatus

1995-01-24

1996-04-16

Novosad, Stephen J.

Bridges

Transportable

14 25, 192 85R, E01D 1512

Patent

active

055070574

ABSTRACT:
A bridge laying apparatus for longitudinally displacing a bridge section includes a pinion shaft; a pinion secured to the pinion shaft for moving with the pinion shaft as a unit; a bearing rotatably and axially slidably supporting the pinion shaft; and a hydraulic power cylinder unit. The power cylinder unit includes a cylinder coaxially surrounding the pinion shaft and defining a cylinder chamber; and a hollow piston axially slidably accommodated in the cylinder chamber and being axially driven by a pressure prevailing in the cylinder chamber. The hollow piston surrounds the pinion shaft. There is further provided a coupling arrangement connecting the hollow piston with the pinion shaft for axially displacing the pinion shaft and the pinion into an axially advanced and into an axially withdrawn position. In the axially advanced position the pinion is situated in a region where it is adapted to mesh with a rack of a bridge section and in the axially withdrawn position the pinion is situated at a clearance from such region.

REFERENCES:
patent: 5040654 (1991-08-01), Trommer
patent: 5329652 (1994-07-01), Wiedeck et al.

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