Detenting lift cover
AssigneeHarvey Hubbell Incorporated
InventorsAlfred L. Ehrenfels, Michael R. Marks
Life of this patent
Estimating the term…
Abstract
A weatherproof housing and rotatable cover have radial lugs which are engaged when the cover is closed in a specific position and rotated clockwise. The cover is hingedly attached to the housing by a J-shaped arm and the cover has a skirt, one surface of which faces walls formed on the arm. The skirt has cam and stop surfaces defining a recess which engages a wall on the arm in the specific position, acting as a detent to inhibit rotational movement of the cover when it is open. Limited tilting movement of the cover is permitted by a sinuous spring in the mounting of the cover on the arm. A stop pin on the skirt prevents the cover from being rotated by 180.degree..
Claims11
An improved combination housing and cover of the type including a generaly cylindrical housing having an open end and an arm hingedly mounted on the outside of the housing and extending to the center of the cover, means for rotatably mounting the cover on the arm, and interengageable means on said housing and said cover for securing said cover to said housing upon rotation of said cover through a predetermined angle from a first position to a second position, wherein the improvement comprises
- a wall formed on said arm and extending toward and closely adjacent to said cover;
- means on said cover for defining, in sequence, a cam having a sloping cam surface, a recess dimensioned to receive said wall, and a protruding stop shoulder,
- said recess being angularly located on said cover to receive said wall and inhibit cover rotation when said cover is in said first position in which said means for securing is disengaged, whereby said cover and arm can be hinged away from said open end with said wall in said recess,
- said cover being rotatable to said second position when said cover is closed by rotating said cover so that said cam surface rides over said wall.
Dependencies are inferred from the claim text.