| 摘要 |
<p>An improved multipoint door lock system of the type described in U.S. Patent 5,290,077 additionally includes header and sill lock pins actuated by lost motion mechanisms for respective movement from a retracted position to an advanced deadbolt locking position engaged with respective header and sill keepers, in response to movement of one or more latch bolts from a normal latched position to a further extended deadbolt position. The latch bolts are further movable between the normal latched position engaged with associated strike sets on the adjacent doorjamb for maintaining the door in a closed position, and a retracted position to permit swinging movement of the door to an open position. The lost motion mechanisms associated with the header and sill pins accommodate latch bolt movement between the latched and retracted positions, without displacing the header and sill pins.</p> |
