Abstract: The present invention is composed with a frame, a rotary drum, a rotor, and a turbination spring. The frame comprising a left upright board, a right upright board, and an upper bridging portion arranged on top of the left upright board and right upright board to define a chamber with front and back opening. The upper bridging portion comprises a first lifting lug coupled thereon. The frame comprises a second lifting lug arranged at a proper position thereof. The left upright board has a breaking frame having a foramen. An axis is arranged across the chamber at the center of the foramen. The axis is couple with a rotary drum that comprises a rescue cord circled therearound. The rotor is arranged on the left end of the rotary drum and comprises a bias component that is adapted to the foramen. The turbination spring is arranged between the right end of the rotary drum and the right upright board, so as to keep the rotary drum restoring to the axis.

Abstract: A lockable anti-fall catch connector includes a catch member, a locking shaft, and a locker unit. The catch member includes a retention arm and two sleeve members provided at two ends of the retention arm, wherein a first locking portion is provided at one of the sleeve members. The locking shaft is slidably extended between the sleeve members, wherein the locking shaft has a second locking portion detachably coupled with the first locking portion to lock up the locking shaft at the retention arm. The locker unit includes a locking element slidably coupled at one of the sleeve members to engage with the locking shaft, wherein after said locking element is disengaged with the locking shaft, the locking shaft is actuated to disengage the second locking portion with the first locking portion in order to slide the locking shaft with respect to the catch member.

Abstract: A triple locking hook connector includes a hook, a locking bar, a first spring, a controlling shaft, and a second spring. The hook has an axle hole and a first groove on an end of a hook opening, and has a spacing portion on the other end of the hook opening. An edge of an end of the locking bar has a first bolt. The first spring is to drive a first bolt to keep at the first position and to drive the other end of the locking bar to remain in the spacing portion. The controlling shaft joins the axle hole via a main axle to restrict the first bolt in the first position and to be driven by a second spring to stay at the third position to ensure the locking bar shutting the hook opening.

Abstract: A safety catch connector includes a catch member, first and second sleeves at two ends of the catch member to define a notch, a locking shaft slidably coupled at the first and second sleeves to selectively open and close the notch, a first controlling unit provided at the first sleeve to releasably lock up the locking shaft at the first sleeve, and a second controlling unit provided at the locking shaft to releasably lock up the locking shaft at the first sleeve, such that the first and second controlling units serves as two safety mechanisms to avoid an unintentional unlocking operation of the locking shaft. The locking shaft is quickly slid to open and close the notch for easy accessing.

Abstract: A safety hook including a hook body, a latch member, a locking portion, and a control member is disclosed. The latch member is capable of rotating about a guide pin and swinging along a guide slot in an arc-shaped path to open or close a hook opening, wherein when the latch member locks and closes the hook opening, the locking portion and the guide pin form a locked chain structure to bear a lateral impact force on the latch member. When the latch member rotates about the guide pin and swings along the guide slot in an arc-shaped path to open or close the hook opening, the control member is capable of driving the locking edge to release the locking portion, so as to open the hook opening by a swinging movement of the latch member.

Abstract: An enhanced safety hook includes a hook body, a latch member, an operation handle and a spring member. The hook body includes a hook hole having a hook opening, a hook end formed at a top end thereof, a pin slot at a position below the hook opening, and a guide slot. The latch member includes a main plate and two side plates define an upside-down U-shape frame, a peripheral edge bridged between the two side plates in such a manner that a top end of the latch member constructs a mouth for receiving the hook end, a guide arm connected to the two side frames to couple with the guide slot, and a pin element coupling with the pin slot.

Abstract: A precision safety ring-shaped hook provides a timing gauge structure which is composed of a sliding groove, a pair of rail members, and a block pin. Each of the rail members has an arc surface. When a first locking axle is moved to an open slot, a first end of a hook body is moved away from the first guiding member and, at the same time, a block pin moves to the arc surface area, so that when the first locking axle is swung in a hook cavity of the hook body, a driving pin is able to position at the arc surface and thus a locking member can be guided by the arc surface to open the opening of the hook body. Accordingly, the opening or shutting of the opening of the hook body by the locking member can thus be precisely operated at one time to provide an advance precision value for the hook and eliminate the interference and impacting drawbacks.

Abstract: An enhanced safety hook includes a hook body, a latch member, an operation handle and a spring member. The hook body includes a hook hole having a hook opening, a hook end formed at a top end thereof, a pin slot at a position below the hook opening, and a guide slot. The latch member includes a main plate and two side plates define an upside-down U-shape frame, a peripheral edge bridged between the two side plates in such a manner that a top end of the latch member constructs a mouth for receiving the hook end, a guide arm connected to the two side frames to couple with the guide slot, and a pin element coupling with the pin slot.

Abstract: A precision safety ring-shaped hook provides a timing gauge structure which is composed of a sliding groove, a pair of rail members, and a block pin. Each of the rail members has an arc surface. When a first locking axle is moved to an open slot, a first end of a hook body is moved away from the first guiding member and, at the same time, a block pin moves to the arc surface area, so that when the first locking axle is swung in a hook cavity of the hook body, a driving pin is able to position at the arc surface and thus a locking member can be guided by the arc surface to open the opening of the hook body. Accordingly, the opening or shutting of the opening of the hook body by the locking member can thus be precisely operated at one time to provide an advance precision value for the hook and eliminate the interference and impacting drawbacks.