Door closer

Details Door closer Door closer

1998-01-28

1999-08-31

Mah, Chuck Y.

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

Closers

Spring and gear

16 62, 16 69, E05F 108

Patent

active

059437367

ABSTRACT:
A door closer includes a casing-like body enclosing a piston member, which is movable back and forth according to the movements of a door and is in cooperation with at least one closer spring, and a closer shaft and a pinion member connected thereto for transmitting the force of the movement of the door to the piston member. The pinion member is mounted on the closer shaft eccentrically with respect to its rolling curve. The piston member is casing-like and is provided with a toothing arranged at its inner surface. The rolling curve of the piston's toothing is at least substantially linear and is inclined relative to the axis of movement of the piston member. The pinion member is located inside the piston member in cooperation with the toothing of the piston member so that the force transmission moment of the pinion member is at its maximum in a position corresponding to the closed position of the door.

REFERENCES:
patent: 1359144 (1920-11-01), Angell
patent: 4744125 (1988-05-01), Scheck et al.
patent: 4763385 (1988-08-01), Furch et al.

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