초록 ▼

This invention is directed to a door closer which is rendered optionally operative to effect either a controlled closing of the door upon opening or to automatically latch or arrest the door in the open position as may be desired. This is attained by a closer housing having a cylinder chamber and a

This invention is directed to a door closer which is rendered optionally operative to effect either a controlled closing of the door upon opening or to automatically latch or arrest the door in the open position as may be desired. This is attained by a closer housing having a cylinder chamber and a connected latching chamber in which a piston is reciprocally mounted in the cylinder chamber which is biased by a compression spring toward the closed position. The piston rod connected to the piston extends through the end of the latching chamber and a latching member and an associated recoil spring is slidably disposed on the piston rod within the latching chamber. An arming device extends into the latching chamber which is shiftable between an armed position and an unarmed position. The arrangement is such that in the unarmed position, the door closer operates in a normal manner and when the arming mechanism is shifted to an armed position, the closer functions to automatically latch the door in the opened position. Unlatching is effected by displacing the door slightly toward opening position whereby the recoil spring effects the unlatching of the door, and whereby the door under the force of the compression spring is closed.

대표청구항 ▼

[ What is claimed is:] [1.] A door closer comprising:a housing having an elongated cylinder forming a piston chamber, anda latching chamber axially disposed relative to said piston chamber,a piston reciprocally mounted within said piston chamber,a piston rod connected to said piston,a compression sp

[ What is claimed is:] [1.] A door closer comprising:a housing having an elongated cylinder forming a piston chamber, anda latching chamber axially disposed relative to said piston chamber,a piston reciprocally mounted within said piston chamber,a piston rod connected to said piston,a compression spring exerting a spring bias on said piston,said piston rod extending through said latching chamber,a latching member and an associated recoil spring loosely mounted on said piston rod within said latching chamber,and an arming device mounted on said housing and extending into said latching chamber,said arming device being readily shiftable between an armed position and an unarmed position,said arming device in the armed position being disposed to be engaged by said latching member to effect automatic actuation of said latching member to arrest the movement of said piston rod toward a door closing position.