Door lock having reinforced strength
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 30, 2008
Grant Date -
Jul 19, 2007
app pub date -
Jan 17, 2006
filing date -
Jan 17, 2006
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A door lock includes a support seat having a recess for mounting a driven member, a control knob including a drive member rotatably mounted in the support seat to rotate the driven member and a rotation member to rotate the drive member and having an outer wall formed with an annular groove and a locking groove, and a locking pin mounted in the support seat and having a locking end selectively extended into the annular groove or the locking groove of the rotation member of the control knob. Thus, the door lock has a dead locking function to lock the door from inside to prevent the door from being unlocked from outside by a key or other tool so as to protect the user's safety inside of the door.
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