Closure fasteners – Bolts – Emergency operating means
Reexamination Certificate
2007-10-30
2007-10-30
Lugo, Carlos (Department: 3676)
Closure fasteners
Bolts
Emergency operating means
C292S093000, C292SDIG065
Reexamination Certificate
active
10833144
ABSTRACT:
A fire-blocking door lock structure is mounted on a fire-blocking door including a frame member, a push handle and a casing. The casing has the bottom thereof fixed to a plate member and connected to a base body. The fire-blocking door lock structure includes a middle latch mechanism mounted in the casing, an upper latch mechanism and a lower latch mechanism symmetrically mounted on opposite sides of the middle latch mechanism and connected to the middle latch mechanism, and an actuation mechanism connected to the middle latch mechanism. When the push handle is pressed, the actuation mechanism is driven to actuate the middle latch mechanism, and the upper latch mechanism and the lower latch mechanism are simultaneously actuated by the middle latch mechanism to unlatch the door lock. When the push handle is released, the door lock is restored to the lock-up status.
REFERENCES:
patent: 1346670 (1920-07-01), Page
patent: 3583740 (1971-06-01), Armstrong
patent: 3663047 (1972-05-01), Zawadzki
patent: 3730574 (1973-05-01), Zawadzki
patent: 3788687 (1974-01-01), Zawadzki
patent: 4167280 (1979-09-01), Godec et al.
patent: 4961330 (1990-10-01), Evans
patent: 5011199 (1991-04-01), Lowe et al.
patent: 5067757 (1991-11-01), Cohrs et al.
patent: 5085475 (1992-02-01), Austin et al.
patent: 5114192 (1992-05-01), Toledo et al.
patent: 5816017 (1998-10-01), Hunt et al.
patent: 6032985 (2000-03-01), Cutter
patent: 6048000 (2000-04-01), Geringer et al.
patent: 6189939 (2001-02-01), Zehrung
patent: 6623050 (2003-09-01), Peng
patent: 6641183 (2003-11-01), Brown
patent: 6854773 (2005-02-01), Lin
patent: 7144050 (2006-12-01), Lin
Lugo Carlos
Shoemaker and Mattare
LandOfFree
Fire-blocking door lock structure does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fire-blocking door lock structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fire-blocking door lock structure will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3893620