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US 4,670,928 AGranted
Transfer bridge
OwnerKurt Alteninventor
Life of this patent
Estimating the term…
Abstract
A transfer bridge for ramps, docks, or other platforms. The retractable and extensible extension of the bridge plate is mounted on guide elements. Provided at the edges of the bridge are longitudinally extending racks that mesh with two pinions that are rigidly interconnected. In order to assure a rattle-free guidance, support wheels are associated with the pinions for relieving the latter of radial load. These support wheels roll on a planar track.
Claims8
A transfer bridge for ramps and the like;
- said bridge is provided with a bridge plate that is pivotably mounted at one end to a ramp or the like, with the other free end of said bridge plate being provided with a retractable and extensible extension that can be placed upon a platform that is to be loaded or unloaded;
- said extension is slidably mounted on said bridge plate via guide elements that extend in the longitudinal direction of said bridge;
- provided between the pivotably supported and free ends of said bridge plate are respective racks that are connected to said bridge plate and extend along the latter;
- said extension is provided with respective pinions that mesh with respective ones of said racks;
- said pinions are rigidly connected to one another;
- said transfer bridge further comprises:
- planar track means connected to said bridge plate in the vicinity of said rack and pinion arrangements;
- and
- a respective support wheel associated with each of said pinions and supported by said extension;
- each of said support wheels has a cylindrical bearing surface that is adapted to roll on said track means in such a way as to relieve said pinions of radial load.
7 more elements
Dependencies are inferred from the claim text.