Oven hinge mechanism including cam balance modifier

Details Oven hinge mechanism including cam balance modifier Oven hinge mechanism including cam balance modifier

1977-12-08

1979-08-07

Kannan, Philip C.

Movable or removable closures

With means mounting closure for swinging

With biasing means

126191, 126194, 49389, E05F 110

Patent

active

041633440

ABSTRACT:
A hinge mechanism is provided for use with an oven housing having side walls, a rear wall, an access opening opposite the rear wall and a door for the access opening wherein the door is movable through a plurality of positions between a closed position and an open position. The hinge mechanism includes a bracket rigidly mounted to the side wall of the oven structure for pivotally securing the door to the side wall of the oven housing. The bracket includes specifically designed camming surface along the top edge. A lever is pivotally secured to the door and includes first and second arm members. A spring having first and second ends is provided for biasing the lever toward the side wall of the oven housing. The first end of the spring is attached to the first arm member of the lever, and the second end of the spring is attached to the side wall of the oven housing adjacent the bracket. The second end of the lever includes a cam follower for engaging the camming surface of the bracket. The lever acting on the camming surface is operative to counterbalance the door so that the door can be balanced at desired positions between the door closed and open positions, and so that the door can be maintained in an unbalanced state at the ends of the door swing. The counterbalancing effect of the lever increases as the door moves from the door closed position to the door open position to match the force delivered by the spring as the spring extends due to the door moving from the door closed position to the door open position.

REFERENCES:
patent: 2425365 (1947-08-01), Davidson
patent: 3003495 (1961-10-01), Coultrip
patent: 3150659 (1964-09-01), Ellis et al.
patent: 3677259 (1972-07-01), Doner
patent: 3955865 (1976-05-01), Wilson
patent: 4001973 (1977-01-01), Rice et al.

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