A ramp door closure apparatus is provided for recreational vehicles, having a recessed linear actuator both draw a cable from a mounting bracket on the ramp door adjacent to the RV opening, to raise and lower the ramp door, and then cam a locking pin fixed to the ramp door into a seal tight position after the ramp door is raised. Upon release of the locking pin from the cam when opening the door, an initial push is provided to facilitate downward rotation of the ramp door. The linear actuator is selectively detachable from the cable so as to allow manual raising and lowering of the ramp door from within the RV, by means of releasable pins accessed in the mounting structure.
Draw-tight apparatus for ramp doors and the like
2022-05-19
Patent
Electronic Resource
English
O'brien's water-tight doors for ships
Engineering Index Backfile | 1897
Water-tight doors and their danger to modern fighting ships
Engineering Index Backfile | 1896
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