Door lock

Claim 2

A door lock adapted to be mounted on a door and operated by first and second doorknobs mounted on opposite sides of said door comprising: a keyed lock associated with said first and second doorknobs, said first doorknob being operable to activate said keyed lock by depressing and turning said doorknob and said second doorknob being operable by means of a key; a latch; means for moving said latch between a retracted unlocked position and an extended locked position; a dead bolt sleeve fitting in sliding relationship around said latch for movement between a retracted unlocked position, said latch and said dead bolt sleeve occupying a common recess in a doorjamb adjacent to said door when said latch and said dead bolt sleeve are extended to locked positions; lever means for extending said dead bolt sleeve by rotation of at least said first doorknob, said lever means being mounted on a shaft connected between and rotatable by said first and second doorknobs and being engageable with said latch responsive to rotation of either of said doorknobs in one direction to retract said latch and being engageable with said dead bolt sleeve responsive to rotation of said door knobs in an opposite direction; means for releasably locking said dead bolt sleeve at said extended locked position; means for releasing said dead bolt sleeve for movement from said extended locked position back to said retracted unlocked position by rotation of either of said first and second doorknobs; said lever means including an operator surface engageable with said means for releasing said dead bolt sleeve to release said dead bolt sleeve from said extended locked position by rotation of either of said doorknobs in said direction which retracts said latch; and means for moving said dead bolt sleeve from said first retracted position to said second extended position from the side of said door on which said second doorknob is mounted and independently of said second doorknob.

Claim 3

A door lock in accordance with claim 1 wherein said means for extending said dead bolt independently of said second knob comprises an operator assembly engageable with said dead bolt sleeve independently of said lever means.

Claim 4

A door lock in accordance with claim 2 wherein said latch is spring biased to an extended locked position and said dead bolt sleeve is spring biased to a retracted unlocked position.

Claim 5

A door lock for releasably locking a door with a doorjamb and having a keyed outer doorknob and an inner doorknob adapted to be locked by depressing and turning, said door lock comprising: a shaft extending between said outer doorknob and said inner doorknob through said door; a spring assembly connected with said shaft for biasing said shaft to a neutral position; a latch adapted to be moved between a retracted unlocked position and an extended locked position; a dead bolt sleeve fitted in sliding relationship around said latch for movement between a retracted unlocked position and an extended locked position; said latch and said dead bolt sleeve being nested together whereby said latch and said dead bolt sleeve are extendable into a common locking recess in a doorjamb adjacent to said door; a supporting frame securing said latch and said dead bolt sleeve together in operating relationship for movement between said retracted unlocked positions and said extended locked positions; a spring secured between said frame and said latch applying a force to said latch for moving said latch to said extended locked position; a spring secured between said frame and said dead bolt sleeve applying a force to said dead bolt sleeve for moving said dead bolt sleeve to said retracted unlocked position; a locking pawl pivotally secured with said frame and movable between a release position and a lock position at which a locking surface on said pawl engages a locking surface on said dead bolt sleeve when said dead bolt sleeve is at said extended locked position for holding said dead bolt sleeve locked; means for biasing said pawl toward a position at which said pawl holds said dead bolt sleeve at said extended locked position; an operating lever on said shaft between said doorknobs and rotatable by said shaft responsive to rotation of said doorknobs; a first operating surface on said lever for engaging and retracting said latch responsive to rotation of said shaft in a first direction by either of said doorknobs; a second operating surface on said lever for engagement with said dead bolt sleeve for moving said dead bolt sleeve from said retracted unlocked position to said extended locked position responsive to rotation of said shaft in a second direction by either of said doorknobs; a third operating surface on said lever for engaging said pawl to rotate said pawl to a position at which said dead bolt sleeve is released for retraction to said unlocked position responsive to rotation of said shaft by either of said doorknobs in said first direction; an operator lever supported around said shaft between said doorknobs adjacent to said outer doorknob; an operator sleeve secured with said operator lever extending toward said inner doorknob; an operator ring connected with said operator sleeve; an operator plate surface on said operator ring engageable with said dead bolt sleeve for moving said dead bolt sleeve independently of said second operator surface on said lever to extend said operator sleeve to said locked position responsive to rotation of said operator lever in said second direction for extending said dead bolt sleeve to said locked position independently of said outer doorknob from the outside side of said door; and a spring secured with said operator ring to return said operator ring, said operator sleeve, and said operator lever in said first direction to a neutral position after extendng and locking said dead bolt sleeve.

Claim 6

A door lock for releasably locking a door with a doorjamb and having a keyed outer doorknob and an inner doorknob adapted to be locked by depressing and turning, said door lock comprising: a shaft extending between said outer doorknob and said inner doorknob through said door; a spring assembly connected with said shaft for biasing said shaft to a neutral position; a latch adapted to be moved between a retracted unlocked position and an extended locked position; a dead bolt sleeve fitted in sliding relationship around said latch for movement between a retracted unlocked position and an extended locked position; said latch and said dead bolt sleeve being nested together whereby said latch and said dead bolt sleeve are extendable into a common locking recess in a doorjamb adjacent to said door; a supporting frame securing said latch and said dead bolt sleeve together in operating relationship for movement between said retracted unlocked positions and said extended locked positions; a spring secured between said frame and said latch applying a force to said latch for moving said latch to said extended locked position; a spring secured between said frame and said dead bolt sleeve applying a force to said dead bolt sleeve for moving said dead bolt sleeve to said retracted unlocked position; a locking pawl pivotally secured with said frame and movable between a release position and a lock position at which a locking surface on said pawl engages a locking surface on said dead bolt sleeve when said dead bolt sleeve is at said extended locked position for holding said dead bolt sleeve locked; means for biasing said pawl toward a position at which said pawl holds said dead bolt sleeve at said extended locked position; an operating lever on said shaft between said doorknobs and rotatable by said shaft responsive to rotation of said doorknobs; a first operating surface on said lever for engaging and retracting said latch responsive to rotation of said shaft in a first direction by either of said doorknobs; a second operating surface on said lever for engagement with said dead bolt sleeve for moving said dead bolt sleeve from said retracted unlocked position to said extended locked position responsive to rotation of said shaft in a second direction by either of said doorknobs; a third operating surface on said lever for engaging said pawl to rotate said pawl to a position at which said dead bolt sleeve is released for retraction to said unlocked position responsive to rotation of said shaft by either of said doorknobs in said first direction; an operator lever supported around said shaft between said doorknobs adjacent to said outer doorknob; an operator sleeve secured with said operator lever extending toward said inner doorknob; an operator ring connected with said operator sleeve; an operator plate surface on said operator ring engageable with said dead bolt sleeve for moving said dead bolt sleeve independently of said second operator surface on said lever to extend said operator sleeve to said locked position responsive to rotation of said operator lever in said second direction for extending said dead bolt sleeve to said locked position independently of said outer doorknob from the outside side of said door; and a spring secured with said operator ring to return said operator ring, said operator sleeve, and said operator lever in said first direction to a neutral position after extendng and locking said dead bolt sleeve.

Claim 7

A door lock in accordance with claim 4 wherein said means for biasing said pawl to a locking position with said dead bolt sleeve comprises a magnet.

Claim 8

A door lock in accordance with claim 4 wherein said means for biasing said pawl to a position for locking said dead bolt sleeve comprises a spring connected with said frame.

Claim 9

A door lock in accordance with claim 4 wherein said frame includes a first pair of vertical spaced side panels for supporting said latch and dead bolt sleeve in sliding nested relationship with each other, and said frame includes a second spaced vertical panels for supporting said pawl.