Egress door opening assister

摘要

A door opening spring assistance apparatus is set forth that will automatically apply a door opening assistance force using a combination of rods and coil springs. The release of the rods by the coil springs reduces the force required to set the door in motion.

主权项

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.