Heavy duty lock
AssigneeI-Tek Metal Mfg. Co., Ltd.
InventorTsung-Yu Huang
Life of this patent
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Abstract
A heavy duty lock is mounted on a door and includes a latch, an anti-theft latch, and a stop-latch. When the door is in an open position, the stop-latch is in an extended position, such that the anti-theft latch cannot move toward an anti-theft position. When the door pivots to a closed position, the stop-latch moves to a retracted position, and the anti-theft control member moves to the anti-theft position. When the latch moves to an unlatching position through normal operation, the anti-theft control member moves to a non-anti-theft position. Thus, the anti-theft control member will be in the anti-theft position when the door is the closed position. When the door is opened through normal operation, the anti-theft control member will move to the non-anti-theft position.
Claims15
A heavy duty lock comprising:
- a case body;
- a latch movably coupled to the case body and movable between a latching position and an unlatching position;
- an anti-theft latch movably coupled to the case body and movable between an anti-theft position and a non-anti-theft position;
- a connecting member pivotably connected to the case body and operatively connected to the latch, wherein pivotal movement of the connecting member actuates the latch to move between the latching position and the unlatching position, and wherein the connecting member includes an unlocking arm;
- and
- an anti-theft control member pivotably connected to the case body, wherein the anti-theft control member includes a first push end operatively connected to the anti-theft latch, wherein the anti-theft control member further includes an abutting end adjacent to the unlocking arm, wherein when the anti-theft latch is in the anti-theft position and the connecting member pivots to move the latch from the latching position toward the unlatching position, the unlocking arm presses against the abutting end to pivot the anti-theft control member and to move the anti-theft latch from the anti-theft position to the non-anti-theft position, and wherein when the latch is actuated by the connecting member to the unlatching position, the anti-theft latch is in the non-anti-theft position.
A heavy duty lock comprising:
- a case body;
- a latch movably coupled to the case body and movable between a latching position and an unlatching position;
- an anti-theft latch movably coupled to the case body and movable between an anti-theft position and a non-anti-theft position;
- a connecting member pivotably connected to the case body, wherein pivotal movement of the connecting member causes movement of the latch between the latching position and the unlatching position;
- an anti-theft control member pivotably connected to the case body, wherein the anti-theft control member includes a first push end operatively connected to the anti-theft latch and a push arm, and wherein when the anti-theft control member pivots, the first push end actuates the anti-theft latch to displace;
- a locking spring including an end coupled to the case body and another end coupled to the push arm;
- a stop rod pivotably connected to the case body, wherein displacement of the anti-theft latch causes rotation of the stop rod;
- and
- a stop-latch movably coupled to the case body, wherein the stop-latch is movable between an extended position and a retracted position, wherein when the anti-theft latch is in the non-anti-theft position and the stop-latch is in the extended position, pivotal movement of the stop rod is prevented to thereby prevent the anti-theft latch from moving from the non-anti-theft position to the anti-theft position, wherein when the anti-theft latch is in the non-anti-theft position and the stop-latch moves to the retracted position, the stop rod is pivotable, the locking spring actuates the push arm to pivot the anti-theft control member, and the anti-theft control member actuates the anti-theft latch to move from the non-anti-theft position to the anti-theft position, and wherein when the anti-theft latch is in the anti-theft position, the stop-latch is prevented from moving to the extended position.
Dependencies are inferred from the claim text.