Patent ID: 6864439

Claim:
A garage door opener for driving a garage door between an open and a closed position comprising: a motor for driving the garage door between the open and the closed position; a drive mechanism responsive to the driving of the garage door; a switch comprising: a plate securing in spaced apart relationship a first electrolinking point and a second electrolinking point, the plate including a spring plate which comprises a first end, a middle portion and a second end; a rotatable block rotationally supported relative to the plate, wherein the rotatable block has a projection or hollow; and a rotatable shaft rotationally driven by the drive mechanism during driving of the garage door, wherein the rotatable shaft is fixed to the rotatable block, wherein the first end of the spring plate is fixed to the first electrolinking point, the middle portion of the spring plate abuts the rotatable block and during rotation of the rotatable block when the middle portion of the spring plate moves out of contact with the radial projection or hollow, the second end of the spring plate moves out of contact with the second electrolinking point and when the middle portion of the spring plate moves into contact with the radial projection or hollow, the second end of the spring plate moves into contact with the second electrolinking point, wherein in use when the second end of the spring plate moves into contact with the second electrolinking point, the driving of the garage door is ceased.