Door closer and check

Details Door closer and check Door closer and check

1986-10-07

1988-08-16

Godici, Nicholas P.

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Checks and closers

Liquid

16 65, E05F 310

Patent

active

047633840

ABSTRACT:
In a door closer, there are provided a vertical rotatable shaft associated with the rotation of a door through an arm, two cams installed integral with the shaft, an urging device for rotating the door in the closing direction through one of the cams and a cylinder device for braking the door during door closing operation through the other of the cams. Thus, the opening of the door is effected by overcoming the force of the urging device and hence the door can be opened lightly. When the door is released, the force of the urging device is transmitted to the one cam and then to the arm, so that the door can be automatically closed. During door closing operation, the cam surface of the other cam pushes the piston rod of the cylinder device, whereby the rotation of the other cam and hence the rotation of the shaft connected with the other cam are braked, avoiding severe shocks to the door.

REFERENCES:
patent: 2752627 (1956-07-01), Carlson
patent: 3760455 (1973-09-01), Berry et al.

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