US 5,368,345 A · Door lock

Abstract

A multifunction hinged door lock with independently biased lever assemblies positioned one on each side of a door that drive the latch bolt of a latchbolt subassembly through the medium of a drive slide positioned for slidable movement in the sub assembly. The lever assemblies include at least one lock actuator such as a keyed cylinder to optionally displace at least one locking device between locked and unlocked configurations. The subassembly may optionally include an extended length bolt, a detent to restrain the bolt from fully extending prior to latching and optionally also include a detent to restrain the bolt from fully displacing prior to locking. The subassembly may optionally include an extended length bolt with a latching lever to assist initial latching. The subassembly may also optionally include a facility whereby inward displacement of the bolt during latching drives the locking device to the unlocked position if it were actuated to the locked position prior to latching.

Claims19

Dependent claims

A lock for a hinged door comprising a deadlocking latch bolt assembly including a casing, a latch bolt supported within the casing and displaceable between an extended and a retracted position and biasing means for urging the bolt towards said extended position;

bolt actuating means for displacing the bolt towards said retracted position, said bolt actuating means including displaceable slide means, a connecting arm engageable with said bolt, and crank means engageable with said slide means and said connecting arm for displacing said bolt towards said retracted position;
a pair of independently operable lever assemblies positioned one on each side of the deadlocking latch bolt assembly, each lever assembly including a rotatable lever and a rotatable drive shaft engageable with said lever and
independent drive means positioned on each side of said slide means and engageable with the drive shaft on the same side, each drive means independently engageable with said slide means to cause said slide means to be displaced to cause said bolt to displace towards said retracted position.

A lock for a hinged door including a deadlocking latch bolt assembly including a casing, a latch bolt supported within the casing and displaceable between an extended and a retracted position and biasing means for urging said bolt towards said extended position;

a pair of independently operable lever assemblies positioned one on each side of the deadlocking latch bolt assembly, each lever assembly including a rotatable lever, and a rotatable drive shaft engageable with the lever, at least one lever assembly including a locking means displaceable between a locked configuration where the lever is prevented from rotating the adjacent shaft and an unlocked configuration where lever rotation rotates the shaft, said at least one lever assembly including a lock actuating means coupled to the locking means for selectively displacing the locking means between locked and unlocked configurations, a spindle independent of said drive shaft connected to said locking means and extending into said latch bolt assembly and, lever means operatively engageable between said spindle and said latch bolt to provide operative interaction between said latch bolt and said locking means.

Dependencies are inferred from the claim text.

Door lock

Life of this patent

Door lock

Life of this patent

Abstract

Claims19