Mechanism for controllably opening and closing appliance door or

Details Mechanism for controllably opening and closing appliance door or Mechanism for controllably opening and closing appliance door or

1985-03-04

1986-11-11

Downey, Kenneth

Movable or removable closures

With means mounting closure for swinging

With biasing means

E05F 110

Patent

active

046214542

ABSTRACT:
Mechanism for controlling the opening and closing of an appliance door or panel uses mechanical coupling members including a crank pivoted about an axis parallel to the axis on which the door or panel is hinged. The crank is connected to one end of a tension helical spring, while the other end of the spring is connected to a fixed anchor point. The crank is also connected to the door panel by means of a link. The spring undergoes a first phase of expansion with initial opening of the door. A deflective post is provided proximate to the spring which bends the spring and results in a second phase of more rapid spring expansion with further opening of the door for compensating for the increased torques acting on the door.

REFERENCES:
patent: 1721308 (1929-07-01), Lormor
patent: 2565202 (1951-08-01), Christison
patent: 2605494 (1951-08-01), Lyons, Jr. et al.
patent: 4270312 (1981-06-01), Courtis et al.

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