Structure of a hinge

Details Structure of a hinge Structure of a hinge

2002-01-07

2003-10-07

Knight, Anthony (Department: 2178)

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

Checks and closers

Hinge

C016S071000

Reexamination Certificate

active

06629334

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to automatic door closers and more particularly to a structure of a hinge which utilizes the gravity of the door to automatically and retardatively close the door of a house or of a furniture.
Conventional automatic door closer are varied in types. The earliest type of them utilizes a spring or springs to retard the movement of the door. However, it makes a noise. The latest type of them (as shown in
FIG. 1
) utilizes hydraulic or pneumatic device which comprises a hydraulic or pneumatic tube
10
, a shaft
15
having one end pivoted to a door frame
14
and the other end pivoted to a rod
11
which has a free end
12
fixed to a back side of a door
13
. When the door
13
is opened, it will be slowly closed without any noise. However, leakage of oil or air may occur after long period of usage and thus will reduce the hydraulic and pneumatic power.
SUMMARY OF THE PRESENT INVENTION
The present invention has a main object to provide a structure of a hinge which utilizes the gravity of a door to retard the closing movement of the door without causing a noise.
Another object of the present invention is to provide a structure of a hinge to automatically and slowly close a door without using an automatic door closer.
Further object of the present invention is to provide a structure of a hinge which is simple, convenient and durable.


REFERENCES:
patent: 4631777 (1986-12-01), Takimoto
patent: 4756051 (1988-07-01), Shy
patent: 4864690 (1989-09-01), Chen
patent: 5133152 (1992-07-01), Grancagnolo
patent: 5152029 (1992-10-01), Pai
patent: 5855040 (1999-01-01), Lin
patent: 6205619 (2001-03-01), Jang

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