Patent ID: 7536885
Filing Date: 2009-05-26
Classification: E05B,Y10T

Abstract:
1. A door security system comprising: a latch bolt; a stationary mounting plate; an action rod configured to move freely relative to the stationary mounting plate, the action rod coupled to the latch bolt; a return spring configured to bias the action rod in a first direction, wherein movement of the action rod in the first direction causes the latch bolt to move to a latched position; a push pad chassis operably coupled to the action rod, the push pad chassis and action rod configured such that a manual force applied to the push pad chassis urges the action rod in a second direction, the second direction being opposite to the first direction, wherein a movement of the action rod in the second direction causes the latch bolt to move to an unlatched position; an electromagnet having an electromagnet housing and an armature, the armature configured to engage the action rod when the electromagnet is de-energized, the electromagnet housing fixedly connected to the mounting plate; wherein when the electromagnet is energized, the armature comes into contact with the electromagnet housing, whereby the electromagnet housing prevents motion of the armature and the action rod and, consequently, maintains the latch bolt in the latched position; a slide assembly coupled to the action rod; and a motor coupled to the slide assembly, wherein the motor, the slide assembly, and the action rod are configured such that when the motor is energized the motor applies a retraction force to the slide assembly and the action rod, whereby the latch bolt is automatically moved to the unlatched position.