Balanced door closing apparatus

Details Balanced door closing apparatus Balanced door closing apparatus

1992-07-23

1994-05-10

Kannan, Philip C.

Movable or removable closures

Mounted for multidirectional or oblique movement

Swings on plural axes; e.g., pivotal link arms

16 64, 16 69, 49386, E05D 1528

Patent

active

053096762

ABSTRACT:
A door closer is shown, which is installed between a door and a door frame, in a balanced door. The door closer is installed in a header of the door frame, and includes an operative connection to a hinge shaft upon which upper and lower door support arms pivot. The operative connection includes a first gear mounted on a check shaft which engages a second gear mounted on the hinge shaft. The second gear preferably has a larger effective diameter than the first gear whereby the limited rotation of the hinge shaft results in a greater rotation of the check shaft to fully utilize the closer functions.

REFERENCES:
patent: 2019527 (1935-11-01), Ellison
patent: 3456388 (1969-07-01), Hanson et al.
patent: 3605339 (1971-09-01), Catlett et al.
patent: 3675370 (1972-07-01), Catlett

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