Patent ID: 7455335
Filing Date: 2008-11-25
Classification: E05B,E05C,Y10S,Y10T

Abstract:
1. An electromechanical push to close latch, comprising: a housing; a ramp ended pawl slidable within said housing between a retracted position and an extended position, said pawl being engageable with a striker when in said extended position; a biasing spring operating on said pawl to bias it to the extended position and permitting push to close operation thereof; a motor; a microprocessor connected to said motor to control the operation thereof; at least one gear connected to said motor and rotated thereby when said motor rotates; a cam connected to be rotated by said at least one gear, said cam rotating to retract said pawl against said biasing spring operation; and a circuit board to which said motor and said microprocessor are mounted; wherein said housing has a first housing portion containing said motor and microprocessor mounted circuit board; and wherein said housing has a second housing portion containing said pawl and said biasing spring; also including at least one sensor to determine when said pawl is in said retracted position; wherein when said at least one sensor determines when pawl is in said retracted position said motor stops rotating, whereby said cam stops rotating and holds said pawl in said retracted position against said biasing spring force; wherein said motor rotates to place said cam in a non-operative position, including at least a second sensor to determine when said cam has reached said inoperative position, said non-operative position permitting said pawl to move between said retracted and extended positions; and wherein said at least one gear is an output gear having a central hub wherein said cam is mounted on said output gear hub, and wherein said first sensor includes a larger arc-shaped hole through said output gear and said second sensor includes a smaller arc-shaped hole through said output gear.