Patent ID: 6813915
Filing Date: 2004-11-09
Classification: E05B,Y10T

Abstract:
In a door lock having a housing with an inner handle pivotally connected to the housing and an outer handle pivotally connected to the housing, a primary dead bolt operably extending out of the housing, a latch selectively extending out of the housing and a secondary dead bolt, wherein the improvement comprises:a first connecting plate adapted to engage with the primary dead bolt and be slidably received in the housing; a first rose adapted to be pivotally received in the housing; a second connecting plate adapted to be slidably received in the housing and engaged with the latch; a second rose adapted to be pivotally received in the housing to drive the second connecting plate and to selectively drive the first connecting plate, the second rose being adapted to be connected to the inner handle so that the pivotal movement of the inner handle is able to drive the second rose to move the second connecting plate and to selectively drive the first connecting plate so as to retract the latch into the housing and the primary dead bolt when extending out of the housing; a third connecting plate adapted to engage with the secondary dead bolt and be slidably received in the housing, the third connecting plate being controllably connected to the second rose and adapted to be controlled to slide by a key; and a third rose adapted to be pivotally received in the housing and engaged with the outer handle so as to control the slidable movement of the second connecting plate to retract the latch.