An assembly (200) for loosening or tightening mechanical nuts includes a socket arm (40) defining a socket (42) at its distal end for engaging a mechanical nut (102); a crank (30) connected or connectable at its first end transversely to a proximate end of the socket arm (40); a sliding hammer (20) connected or connectable to a second end of the crank (30), thereby being operable to impart a rotational impact on the socket arm (40) via the crank (30); and a support structure (250) connected or connectable at its proximate end to one of the socket arm (40), crank (30), or sliding hammer (20) and defining at its remote end a support surface (260) operable to bear against an external structure (100) thereby to support the assembly (200) in use.

An eccentric rotary fastening device is disposed between a driving tool and a rotated member. The eccentric rotary fastening device includes a rotary seat and at least one impact member. The rotary seat is rotated around a rotational axis. The rotary seat has a driving end and a tightening end. The driving end is detachably connected to the driving tool, and the tightening end is detachably connected to the rotated member. The impact member has a center of gravity and is connected to an exterior of the rotary seat. There is a distance between the center of gravity and the rotational axis.

An eccentric rotary fastening device is disposed between a driving tool and a rotated member. The eccentric rotary fastening device includes a rotary seat and at least one impact member. The rotary seat is rotated around a rotational axis. The rotary seat has a driving end and a tightening end. The driving end is detachably connected to the driving tool, and the tightening end is detachably connected to the rotated member. The impact member has a center of gravity and is connected to an exterior of the rotary seat. There is a distance between the center of gravity and the rotational axis.

The present invention relates in general to the field of securing structural members to masonry, and more specifically, to a drop-in anchor setting tool and method of use. The drop-in anchor setting tool includes a hands-free safety feature that allows the drop-in anchor and setting tool to remain embedded in the masonry during installation. In particular, the drop-in anchor setting tool includes a threaded portion configured to screw together the drop-in anchor and the drop-in anchor setting tool during installation. A purpose of invention is to provide a drop-in anchor setting tool and method of use that minimizes risk of injury to the operator during installation, is easy to use, and cost-effective to manufacture.

A power tool includes an anvil (14) operably driven by a motor (10); an insertion hole (91) defined the anvil, into which a bit is insertable; a through hole (92) extending radially from the insertion hole; a ball (93) disposed in the through hole; and a manually-movable sleeve (99) mounted around on the anvil and being axially slidable relative to the anvil. At a retracted position, the manually-movable sleeve presses the ball radially inwardly. At an advanced position, the manually-movable sleeve releases the pressing of the ball. A flat spring (97) is configured to bias the ball radially inwardly. The manually-movable sleeve has a length such that the flat spring is exposed at the advanced position.

A power tool includes an anvil (14) operably driven by a motor (10); an insertion hole (91) defined the anvil, into which a bit is insertable; a through hole (92) extending radially from the insertion hole; a ball (93) disposed in the through hole; and a manually-movable sleeve (99) mounted around on the anvil and being axially slidable relative to the anvil. At a retracted position, the manually-movable sleeve presses the ball radially inwardly. At an advanced position, the manually-movable sleeve releases the pressing of the ball. A flat spring (97) is configured to bias the ball radially inwardly. The manually-movable sleeve has a length such that the flat spring is exposed at the advanced position.

A rail fence retractor allowing removal of a fence rail engaged with a fence post comprising a blade having a first and second end. The first end of the blade is configured for insertion into a fence post slot having a rail inserted therein. The rail has self-locking tabs which must be depressed for removal of the rail from the fence post slot. The fence rail retractor also has a handle which is attached to the second end of the blade. The handle allows the application of force against handle to fix the position of the handle against the fence post during removal of the rail from the fence post slot. The handle is also useful in carrying the rail fence retractor when not in use. The handles of the rail fence retractor may be configured to allow integration with the blade. The handles may be also be configured to allow a pair of rail fence retractors to fit or snap together when not in use.

A socket has a socket section and an assembling section connected to the socket section. The socket section is cylindrical and has an axial direction, a peripheral surface, a first end, a second end, a socket hole, and a grasp portion. The first end and the second end of the socket section are opposite each other in the axial direction of the socket section. The socket hole is axially defined in the first end of the socket section. The grasp portion is annularly concaved in the peripheral surface of the socket section and has a cross-section being along a diametrical surface of the socket section. The cross-section of the grasp portion has two opposite curved edges. The assembling section is coaxially connected to the second end of the socket section. The concave grasp portion makes the socket easily and securely grasped.

A hand tool for carrying out at least the screwing/unscrewing and/or percussion operations for boring, marking or punching, in particular on assembling means such as screws, bolts or pins. The hand tool includes at least one body attached to a handle. A tool-carrier rod is provided for carrying an impression corresponding to the operation to be carried out. An integrated means is provided for imparting an axial percussion in the direction of the tool-carrier rod. According to the invention, a shock rod is provided inside the tool-carrier rod and is capable of longitudinal movement for directly imparting the percussion force to the impression.

A hand tool where one end of the tool has a force applied along a linear handle and a socket engaging tool head on the opposite end of the linear handle to direct the force to rotate a stuck fastener engaged bolt by the tool head.