Top opening door assembly
AssigneeSomerset Welding & Steel, Inc.
InventorHarold E. Walker, Jr.
Life of this patent
Estimating the term…
Abstract
Top closing doors are pivotally mounted on a trailer and are provided with a driving mechanism including a drive cylinder connected by a pin to an endless chain extended in figure-eight fashion around opposed sprockets at the ends of the trailer. The doors are driven by swinging arms connected to the sprockets so as to move in opposite directions during opening and closing and provide full 270.degree. opening movement. The chain includes a master drive link to provide driving stability and an adjustable link passing in guiding relationship to the master link and for providing the required driving tension. The master link is driven by a drive pin connected to a hydraulic cylinder.
Claims13
Top opening doors for a trailer or the like comprising:
- a first and second door pivotally mounted to each side of said trailer so as to cover the top of said trailer when closed;
- and
- positive drive means connected to said doors including an endless chain, a master drive link for stable driving action and a drive motor connected to said chain for actuating said doors in a controlled manner about a full 270.degree. of movement between a fully opened and fully closed position;
- said endless chain including means for adjusting the tension of said chain, said adjusting means forming a link of the chain and crossing in guiding relationship between spaced straps of said master drive link.
Top opening doors for a trailer or the like comprising:
- a first and second door pivotally mounted to each side of said trailer so as to cover the top of said trailer when closed;
- and
- drive means connected to said doors including an endless chain, a master drive link for stable driving action and a drive motor connected to said chain for actuating said doors about a full 270.degree. of movement between a fully opened and fully closed position;
- said drive motor including a cylinder positioned adjacent to and substantially in alignment with said endless chain and connected thereto by connecting means.
Top opening doors for a trailer, comprising:
- a pair of doors, one door being pivotally mounted to each side of said trailer so as to cover the top of said trailer when closed;
- a pair of opposing sprockets rotatably mounted on shafts at each end of said trailer;
- an endless chain extending in figure-eight fashion over each pair of opposing sprockets at each end of said trailer;
- arms connecting each of said sprockets to one of said doors so that one sprocket at each end of said trailer is connected to each door;
- and
- a drive motor at each end of said trailer connected to the associated endless chain so as to positively drive said doors 270.degree. in a controlled manner between a fully opened and fully closed position;
- said drive motor including a cylinder adjacent to and substantially in alignment with said endless chain and connected thereto by connecting means.
Dependencies are inferred from the claim text.