Patent ID: 7648180

Claim:
In combination: a door frame having a facing side; a door constructed and arranged to cooperate with said door frame, said door having a facing side, wherein said door is closable relative to said door frame and wherein when said door is in a close condition relative to said door frame, the facing side of the door frame is substantially parallel with the facing side of the door; and a lock assembly for securing said door in a locked condition relative to said door frame, said lock assembly comprising: a first plate defining first and second receiving apertures, said first plate being constructed and arranged with a first mounting portion which is attached to facing side of said movable panel door; a second plate defining third and fourth receiving apertures, said second plate being constructed and arranged with a second mounting portion which is attached to the facing side of said door frame, said fourth receiving aperture is a slot with first and second ends; and a pair of movable securing bolts mounted on said first plate and being movable into engagement with said second plate; wherein, when the first receiving aperture is aligned with said third receiving aperture and said second receiving aperture is aligned with said first end of said slot, said pair of movable securing bolts can be moved through their respective apertures to fully close said door with respect to said door frame or by only moving the securing bolt aligned with said second receiving aperture and said first end of said slot through the apertures, so that when said door is moved in an open direction, the securing bolt will move from said first end toward said second end of said slot, permitting partial opening of said door while still preventing complete opening of said door.