Exit delaying mechanism for panic exit door

Details Exit delaying mechanism for panic exit door Exit delaying mechanism for panic exit door

1993-06-01

1995-05-09

Cuomo, Peter M.

Locks

Special application

For closures

292 92, E05C 1502

Patent

active

054129613

ABSTRACT:
A mechanism for dogging a door latch assembly of a panic exit device having a retractible door latch biased to move outward from the door latch assembly, with inward movement of the door latch being activated by a push bar, includes a mechanism for holding a key cylinder positioned adjacent to the door latch assembly. A catch mechanism linked to the door latch is configured to move as the door latch is retracted, and a arm is pivotably mounted adjacent to the key cylinder holding mechanism. The arm is configured to retain the catch mechanism, with the door latch being prevented from outwardly moving with respect to the door latch assembly. When a key cylinder having an attached sweep arm is rotated, the sweep arm can alternatively rotate to engage the catch mechanism when a key is turned in the key cylinder, dogging the door latch assembly, or undog the catch mechanism from the arm by sweeping around to break the attachment between the arm and catch mechanism, allowing the door latch to move from its retracted position to its normally biased outward position with respect to the door latch assembly.

REFERENCES:
patent: 4624490 (1986-11-01), Miller
patent: 4785286 (1988-11-01), Martin
patent: 4801163 (1989-01-01), Miller
patent: 4968070 (1990-11-01), Choi
patent: 5011199 (1991-04-01), Lowe et al.
patent: 5035450 (1991-07-01), Muller
patent: 5085475 (1992-02-01), Austin et al.
patent: 5169185 (1992-12-01), Slaybaugh et al.

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