A chain block is provided including a first frame, a second frame, a wheel cover side structure including a wheel cover which covers the hand wheel and residing on an opposite side of the first frame in a direction away from the second frame, and a gear case side structure including a gear case covering a gear member and residing on an opposite side of the second frame in a direction away from the first frame, and each of the first frame and the second frame is provided with a rolling restriction portion restricting rolling along outer circumferences of the first frame and the second frame in a case of a standing posture in which the first frame and the second frame contact an installation part at the same time.

A chain hoist (10) having an improved chain guide (12) for a link chain (14). The chain guide (12) has a channel (36) with a cross-shaped cross section, through which the link chain (14) extends. An end surface (26) of the chain guide (12) extends away from a mouth opening (28) of the channel (36). The channel (36) establishes a through-passage direction (D) which widens in the direction of the end surface (26), and a protrusion (30) is formed on the end surface (26) around the mouth opening (28) of the channel (36).

A chain hoist (10) having an improved chain guide (12) for a link chain (14). The chain guide (12) has a channel (36) with a cross-shaped cross section, through which the link chain (14) extends. An end surface (26) of the chain guide (12) extends away from a mouth opening (28) of the channel (36). The channel (36) establishes a through-passage direction (D) which widens in the direction of the end surface (26), and a protrusion (30) is formed on the end surface (26) around the mouth opening (28) of the channel (36).

An adaptor for a power tool having a hardened cylindrical body having a tool receiving end and a lifting device engaging end. The tool receiving end which has, a square hole axially extending within the cylindrical body, for connecting between an output head of an impact rotary tool, and a lifting device receiving end. The device is used to improve speed in lifting procedures with various lifting devices.

A hanging hand-driven chain hoist, is able to lift, sustain and lower a load hanging on a chain and a hook, by employing a sprocket built in a spherical helical gear driven by the rotational movement of a ring with internal spiral thread, coupled to a drive gear engaged by an drive chain pulled by an operator. An overload prevention and detection system provides safety against operator attempts to lift loads having weights over the capacity of the system.

A hanging hand-driven chain hoist, is able to lift, sustain and lower a load hanging on a chain and a hook, by employing a sprocket built in a spherical helical gear driven by the rotational movement of a ring with internal spiral thread, coupled to a drive gear engaged by an drive chain pulled by an operator. An overload prevention and detection system provides safety against operator attempts to lift loads having weights over the capacity of the system.

A powered handheld chain driver for driving a chain from a chain fall thereby minimizing the effort required to raise and lower loads. The chain driver comprises an integrated or separated drive motor driving a chain sprocket that drives the chain. The chain sprocket is positioned between a pair of vertical spaced chutes and is engaged within a portion of the chutes. Each spaced chute is split and can be opened in a release configuration, for loading and unloading a chain therein. The chutes also comprise a drive configuration wherein the chutes are closed and the chains are captured within the chutes during chain driver operation. Lateral of each chute is a hand assembly comprising handles for supporting the chain driver with the user's hands. A battery is mounted on one side of the chain driver to supply power to the drive motor via one or more power switches.

A powered handheld chain driver for driving a chain from a chain fall thereby minimizing the effort required to raise and lower loads. The chain driver comprises an integrated or separated drive motor driving a chain sprocket that drives the chain. The chain sprocket is positioned between a pair of vertical spaced chutes and is engaged within a portion of the chutes. Each spaced chute is split and can be opened in a release configuration, for loading and unloading a chain therein. The chutes also comprise a drive configuration wherein the chutes are closed and the chains are captured within the chutes during chain driver operation. Lateral of each chute is a hand assembly comprising handles for supporting the chain driver with the user's hands. A battery is mounted on one side of the chain driver to supply power to the drive motor via one or more power switches.

A chain block includes: a main body frame; and a gear cover that is attached to the main body frame to form an internal space sealed off from an outside between the gear cover and the main body frame, and rotatably supports one end side of a reduction gear member, wherein a gear-side frame part is provided with a bottom part and an outer peripheral wall part projecting from an outer peripheral edge portion of the bottom part, and an upper rib having both ends coupled to the outer peripheral wall part is provided at a portion of the gear-side frame on an upper side where an insertion hole and a link shaft are provided and on a side nearer a center of the internal space than is the outer peripheral wall part, and the upper rib is provided adjacent to the insertion hole and the link shaft.

A chain block includes: a main body frame; and a gear cover that is attached to the main body frame to form an internal space sealed off from an outside between the gear cover and the main body frame, and rotatably supports one end side of a reduction gear member, wherein a gear-side frame part is provided with a bottom part and an outer peripheral wall part projecting from an outer peripheral edge portion of the bottom part, and an upper rib having both ends coupled to the outer peripheral wall part is provided at a portion of the gear-side frame on an upper side where an insertion hole and a link shaft are provided and on a side nearer a center of the internal space than is the outer peripheral wall part, and the upper rib is provided adjacent to the insertion hole and the link shaft.