An exemplary ring lock generally includes a housing, a shackle, a lock cylinder, and a first frangible component. The shackle is movable relative to the housing between an open position and a closed position. The lock cylinder is operable to maintain the shackle in the closed position, and is selectively operable to permit movement of the shackle from the closed position to the open position. The first frangible component is configured to break in response to application of a first threshold torque to the lock cylinder. With the first frangible component broken, the lock cylinder is prevented from permitting movement of the shackle from the closed position to the open position.

An exemplary ring lock generally includes a housing, a shackle, a lock cylinder, and a first frangible component. The shackle is movable relative to the housing between an open position and a closed position. The lock cylinder is operable to maintain the shackle in the closed position, and is selectively operable to permit movement of the shackle from the closed position to the open position. The first frangible component is configured to break in response to application of a first threshold torque to the lock cylinder. With the first frangible component broken, the lock cylinder is prevented from permitting movement of the shackle from the closed position to the open position.

Described herein is a Near Field Communication disc lock. The disc lock has a near field communication antenna which receives the near field signal to lock or unlock the disc lock. The antenna passes the signal via wires to a near field circuit board which controls the lock motor which turns a lock cam to pressure or release a lock ball. The lock ball triggers the lock ball lever to lock or unlock the lock ring. In this manner, there is now an NFC lock which cannot be cut with bolt cutters.

A bicycle lock includes a housing having a retractable spool positioned therein, a flexible cable releasably wound about the retractable spool and partially exposed exterior of the housing, a fastener attached to the flexible cable and located exterior of the housing, and a locking mechanism located at the housing and selectively engaged with the fastener and the retractable spool. Advantageously, when the fastener is inserted into the locking mechanism and the locking mechanism is disposed at a first position, the flexible cable has a fixed longitudinal length. Advantageously, when the fastener is removed from the locking mechanism and the locking mechanism is disposed at a second position, the flexible cable has an adjustable longitudinal length. Notably, the first position is a locked position, and the second position is an unlocked position.

A portable, flexible lock is disclosed with a cut-resistant strap formed of a durable and flexible outer portion and that defines a chamber for receiving a second durable, flexible inner portion therein. The inner portion floats freely side-to-side within the chamber thereby making the inner portion more difficult to cut. In a disclosed embodiment, the outer portion is formed of woven KEVLAR and the inner portion is a stainless steel cable. The lock may include a housing assembly that holds one end of the strap while a synching device, such as a pivoting cam or the like, detachably secures a portion of the opposite end of the strap thereto when the synching device in a locked position. A lock structure holds the synching device in its locked position. One or more tools may be detachably secured to the housing assembly.

A portable, flexible lock is disclosed with a cut-resistant strap formed of a durable and flexible outer portion and that defines a chamber for receiving a second durable, flexible inner portion therein. The inner portion floats freely side-to-side within the chamber thereby making the inner portion more difficult to cut. In a disclosed embodiment, the outer portion is formed of woven KEVLAR and the inner portion is a stainless steel cable. The lock may include a housing assembly that holds one end of the strap while a synching device, such as a pivoting cam or the like, detachably secures a portion of the opposite end of the strap thereto when the synching device in a locked position. A lock structure holds the synching device in its locked position. One or more tools may be detachably secured to the housing assembly.

The invention relates to an anti-theft device that is both highly resistant to attack by hand-carried bolt cutters and saw blades while also exhibiting a weight suitable for use with bicycles. The device is made with a plurality of interlinked titanium alloy arm members, each of which exhibits a hardness of HRC 30 or more and a cross-sectional distance of 8 mm or more.

The invention relates to an anti-theft device that is both highly resistant to attack by hand-carried bolt cutters and saw blades while also exhibiting a weight suitable for use with bicycles. The device is made with a plurality of interlinked titanium alloy arm members, each of which exhibits a hardness of HRC 30 or more and a cross-sectional distance of 8 mm or more.

A chain lock is provided. The chain lock includes a lock body and a linkage chain. The lock body has a lock core and a lock body side surface. The linkage chain is formed via linking a plurality of link plates and has a first end and a second end. The first end is joined with the lock body. The second end can be inserted into a socket and secured by the lock core. The linkage chain can be wound around the lock body when the second end is unlocked, and wherein at least one of the plurality of link plates, except the link plates serving as the first end and the second end, engages the lock body side surface when the linkage chain is wound around the lock body.

An example ring lock generally includes a housing, a shackle, a lock mechanism, and an indicator. The shackle is mounted to the housing for movement between a first position and a second position. The lock mechanism is configured to selectively retain the shackle in at least one of the first position or the second position. The indicator is operable to selectively display an indicium related to an open/closed state of the ring lock. The indicator is configured to display the indicium when the shackle is in the first position, and is configured to not display the indicium when the shackle is in the second position.