Device permitting a plug or a cover to lock in a detachable manner onto a frame
AssigneeNorinco
InventorsPhilippe Tievant, Philippe Dutilleul
Life of this patent
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Abstract
This invention is a device permitting a plug or a cover to lock in a detachable manner onto a frame. In accordance with the invention, the metal washer (9), interposed between the screw head (4) and the mounting surface (7) formed at the bottom of the housing (5) of the cover (2), includes two radial wings diametrically opposite (9a) working together with internal parts (13) of the housing (5) butting and preventing a rotation of the washer (9) during tightening of the fastening screw (3). The invention has applications for public roadways.
Claims8
Device permitting a cover to lock in a detachable manner onto a frame the device comprising:
- at least one fastening screw inserted through a perforation in the cover and wherein the screw has a threaded part anchored to the frame and a head sunk into a housing emerging from the cover while resting against a flat surface at the bottom of the housing in order to jam the cover onto the frame by tightening the screw,
- a waterproof washer and an anti-rotational washer interposed successively between the flat surface and the screw head, wherein the anti-rotational washer is provided with at least one means of abutting internal parts of the housing to prevent a rotation of the anti-rotational washer during tightening of the at least one fastening screw.
Dependencies are inferred from the claim text.