Self locking support mechanism

Claim 1

A self-locking support mechanism for leveling an appliance relative to the floor, comprising: a. a support member secured to the appliance and having at least one end wall and one side wall, said side wall having a slot; b. a rotatable cam member having: i. a pivot point, ii. a cam surface to contact the floor for height adjustment, said cam surface contacting the floor at a point through which a vertical force moment is applied to the cam member, iii. a radius surface relative to the pivot point and opposite the cam surface; c. a pin through the pivot point of the cam member and the slot in the support member side wall and slidably movable within the slot, said slot and support end wall being spaced from and converging toward each other in a direction away from the floor and arranged such that the vertical force moment is applied to the cam member between the pivot point and the support end wall; and d. means for rotating the cam member, whereby upon rotating the cam member the pin is moved within the slot away from the floor and the cam member radius surface abuts the support end wall to lock the cam member.