Self return mechanism

Details Self return mechanism Self return mechanism

1992-03-10

1993-10-12

Kannan, Philip C.

Movable or removable closures

With means mounting closure for reciprocation

16 49, 16 74, 49506, E05D 1506

Patent

active

052514021

ABSTRACT:
A self return mechanism for automatically closing or opening a closure, preferably having a movable door supported during movement by a door frame, the door having a braking element mounted to the top edge of the door, and a door return element. The door return element has one end coupled to the door frame structure and its other end coupled to the door and has an intermediate segment oriented to pass through the braking element and around a portion of the grooved circumference of a pulley wheel. The door return element is preferably an elastic element having an outer dimension that changes as the door moves from an opened position to a closed position. The self return mechanism controls the acceleration and deceleration of the door as it is automatically closed, returns the sliding door to its closed position when it is opened only partially, allows for easy removal and replacement of the door from the door frame structure and is inexpensive to manufacture and simple to assemble.

REFERENCES:
patent: 36647 (1962-10-01), Gilfillan
patent: 172887 (1976-02-01), Miller
patent: 200107 (1978-02-01), Threlfall
patent: 350535 (1986-10-01), Hicks
patent: 400041 (1889-03-01), Bender et al.
patent: 1010071 (1911-11-01), Potter
patent: 1524765 (1925-02-01), Van Arnhem
patent: 3837119 (1974-09-01), Conneally et al.
patent: 3928889 (1975-12-01), Wartian
patent: 3978617 (1976-09-01), Eventoff
patent: 4301623 (1981-11-01), Demukai
patent: 4641461 (1987-02-01), Niekrasz et al.
patent: 4891911 (1990-01-01), Yung

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