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US 12,687,039 B2Granted
Heavy duty lock
AssigneeI-Tek Metal Mfg. Co., Ltd.
InventorTsung-Yu Huang
Life of this patent
Estimating the term…
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.
Claims12
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;
- 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,
- an interlocking member coupled with the latch to move therewith, wherein the interlocking member includes a first actuating portion, wherein the connecting member further includes a push end abutting the first actuating member, wherein when the interlocking member pivots, the push end actuates the interlocking member to thereby move the latch from the latching position to the unlatching position;
- and
- a biasing spring disposed between the interlocking member and the case body, wherein the biasing spring biases the interlocking member to thereby bias the latch to the latching position.
5 more elements
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;
- 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;
- a locking operation device mounted to the case body, wherein the locking operation device includes a pivotable push block, wherein the anti-theft control member further includes a second push end spaced from the first push end, wherein the anti-theft latch further includes an extension portion having a stop side, wherein the stop rod includes a stop end abutting the extension portion, wherein the stop-latch includes a stop arm, wherein when the stop-latch is in the extended position, the stop arm abuts the stop end to prevent rotation of the stop rod, wherein when the stop-latch is in the retracted position, the stop arm is spaced from the stop end to permit rotation of the stop rod, wherein when the anti-theft latch is in the anti-theft position, rotation of the push block presses against the second push end, such that the anti-theft control member pivots and actuates the anti-theft latch to move from the anti-theft position to the non-anti-theft position;
- an interlocking member coupled with the latch to move therewith, wherein the interlocking member includes a second actuating portion;
- and
- an unlatching rod pivotably connected to the case body, wherein the unlatching rod includes a first push portion and a second push portion spaced from the first push portion, wherein the second push portion abuts the second actuating portion, wherein rotation of the push block presses against the first push portion and the second push end to thereby pivot the unlatching rod and the anti-theft control member, and the second push portion presses against the second actuating portion, wherein with the connecting member remained unmoved, the interlocking member actuates the latch to move from the latching position to the unlatching position, and the anti-theft latch is actuated to move from the anti-theft position to the non-anti-theft position.
9 more elements
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;
- 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;
- an interlocking member coupled with the latch to move therewith, wherein the interlocking member includes a first actuating portion, wherein the connecting member further includes a push end abutting the first actuating member, and wherein when the interlocking member pivots, the push end actuates the interlocking member to thereby move the latch from the latching position to the unlatching position;
- and
- a biasing spring disposed between the interlocking member and the case body, wherein the biasing spring biases the interlocking member to thereby bias the latch to the latching position.
8 more elements
Dependencies are inferred from the claim text.