Locks – Special application – For closures
Reexamination Certificate
1999-12-07
2001-12-11
Gall, Llyod A. (Department: 3627)
Locks
Special application
For closures
C070S150000, C070S470000, C070S478000, C070S479000, C070S484000, 28
Reexamination Certificate
active
06327880
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a door lock device. More particularly, the present invention relates to a door lock device which is detached easily.
DESCRIPTION OF THE RELATED ART
A conventional door lock device has a dead bolt and a latch bolt. However, the latch bolt will block a door while the door is opened. Furthermore, a doorknob is often protruded from an outer face of the door. Thus a child may bump into the doorknob accidentally. If a core of the conventional door lock device is broken, the whole door lock device should be replaced.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a door lock device which can be disassembled easily. Thus a core of the door lock device can be replaced easily.
Another object of the present invention is to provide a door lock device which has a case frame having an upper hollow cylinder inserted through an upper through hole of a door and a lower hollow cylinder inserted through a lower through hole of the door so that an outer face of the case frame can contact an outer face of the door flatly.
Another object of the present invention is to provide a door lock device which has a drive mechanism having a rack to drive a latch bolt device so that the latch bolt device will not block a door while the door is opened.
Another object of the present invention is to provide a door lock device which has a torsion spring to force a first pressing plate contacting a case frame while the first pressing plate is not operated.
REFERENCES:
patent: 1184766 (1916-05-01), Mihel
patent: 1387245 (1921-08-01), Dowling
patent: 1675041 (1928-06-01), Nakahara
patent: 2648969 (1953-08-01), Miller et al.
patent: 3172281 (1965-03-01), Tugle
patent: 4418552 (1983-12-01), Nolin
patent: 4594864 (1986-06-01), Hart
patent: 4606203 (1986-08-01), Esser
patent: 4864835 (1989-09-01), Wartian
Bacon & Thomas PLLC
Gall Llyod A.
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