Patent ID: 9151099
Filing Date: 2015-10-06
Classification: E05F,E05Y

Abstract:
1. A spring-assisted door opening mechanism comprising; a housing comprising a metal plate, the metal plate having at least one thru-bore; a cylinder having a longitudinal axis and having a cylinder length substantially greater than a cylinder diameter, the longitudinal axis in alignment with the thru-bore; a rod carried in the cylinder and the thru-bore, a first end of the rod extending from the thru-bore and supporting an end cap having a diameter greater than a diameter of the rod, and a second end extending from a free end of the cylinder; a coil spring carried by the first end of the rod and retained on the rod between the end cap and a surface of the metal plate; wherein, the end cap engages either a door frame or a door, the spring providing a door entry assistance force that is less than the amount of force needed to set the door in motion when the door is unlatched so as to lessen a force needed by an operator to open the door when the door is closed and has a greater first air pressure pressing against one side of the door than a second air pressure pressing against a second side of the door.