Automatic latch device

Details Automatic latch device Automatic latch device

1995-11-13

1997-04-08

Lindsey, Rodney M.

Closure fasteners

Bolts

Sliding and rotary

292DIG66, E05C 502

Patent

active

056180667

ABSTRACT:
A latch device includes a pin slidably engaged in a housing. The pin includes one end for engaging with a retainer so as to lock a door panel in place. A spring member is engaged between the pin and the housing and is made of shape memory alloy and is deformed to a shorter or longer length different from an original length so as to allow the pin to engage with the retainer. The spring member may be recovered to the original length so as to disengage the pin from the retainer when the spring member is heated such that the door panel may be opened automatically in a fire.

REFERENCES:
patent: 3999790 (1976-12-01), Rogen
patent: 4505501 (1985-03-01), Fuchs et al.
patent: 4539929 (1985-09-01), Sestak et al.
patent: 5121950 (1992-06-01), Davidian
patent: 5125695 (1992-06-01), Hartwell
patent: 5380053 (1995-11-01), Saino
patent: 5427420 (1995-06-01), Moore

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