Checking device for roller supported doors

Details Checking device for roller supported doors Checking device for roller supported doors

1997-12-19

1999-02-02

Redman, Jerry

Movable or removable closures

With means to vary opening span or speed during movement

49 15, E05F 1500

Patent

active

058649867

ABSTRACT:
A check mechanism is provided to regulate door speed of a roller supported sliding door as the door is manually opened or closed. The mechanism is attached to a door hanger and uses a rocker arm, which slides along a control track. The control track has elevated or offset control regions which cause the rocker arm to apply force to a brake arm through an adjustable spring. The brake arm pivots to apply braking force through a brake pad to a door roller. The control track may contain regions of no control or of lesser control to allow the door to slide freely between opening or closing regions of control.

REFERENCES:
patent: 1606049 (1926-11-01), Youngblood
patent: 2423129 (1947-07-01), Tobias
patent: 2526503 (1950-10-01), Raque
patent: 3378952 (1968-04-01), Bidelman et al.
patent: 3431678 (1969-03-01), Stuart et al.
patent: 3564772 (1971-02-01), Ozier et al.
patent: 4067144 (1978-01-01), Ogishi
patent: 4912878 (1990-04-01), Bently

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