The present invention provides a successive screw fastener which enhances a screw fastening function and improves operability and rapidness of each element. A successive screw fastener 1 according to the present invention has: a grip unit 2 including a trigger switch 16 with a direction lever 17 which sets a direction of forward rotation or reverse rotation of a rotary drive section 22 which rotationally drives a bit B; a screw fastener main body unit 3 including a gap adjustment mechanism section 91 which assuredly guides a screw S to a fastening acting position, a screw feed mechanism section 61 which avoids interference of the screw S and the bit B, a screw guide position adjustment mechanism section 101 which can simply adjust a gap between the fastening acting position and a fastening target position, and a magazine mounting mechanism section 111 having rigidity; a magazine unit 4 which can be easily attached to or detached from the screw fastener main body unit 3; and a handle unit 5 having excellent operability of an operator.

The mechanical technology of converting oscillatory motion, into one direction of rotation, as described and claimed in U.S. Pat. No. 5,881,609, while being efficient, useful and having numerous applications, has its disadvantage of not being able to function unless user employs both hands; one hand to apply oscillatory motion to an input, while opposite hand immobilizes the axial rotation of the converting gear-train, in order for the conversion to be activated. Hence, the goal of this documentation, is to teach several different means, that maintain the immobility of axial rotation of the dual-drive gear train in order to activate the dual-drive feature, without the use of either of user's hands, thereby conveniently leaving one of user's hands available for holding a work piece.

The mechanical technology of converting oscillatory motion, into one direction of rotation, as described and claimed in U.S. Pat. No. 5,881,609, while being efficient, useful and having numerous applications, has its disadvantage of not being able to function unless user employs both hands; one hand to apply oscillatory motion to an input, while opposite hand immobilizes the axial rotation of the converting gear-train, in order for the conversion to be activated. Hence, the goal of this documentation, is to teach several different means, that maintain the immobility of axial rotation of the dual-drive gear train in order to activate the dual-drive feature, without the use of either of user's hands, thereby conveniently leaving one of user's hands available for holding a work piece.

An electric ratchet wrench includes a driving member rotatably mounted in a body for driving a fastener. A pawl device is pivotably mounted to the driving member. First and second ring gears are rotatably mounted around the driving member and mesh with the pawl device. A direction switching rod is pivotably mounted to the driving member. A spur gear is mounted on a transmission shaft rotatably received in the body and meshes with the first and second ring gears. A clutch member is mounted on the transmission shaft and is releasably coupled with another clutch member coupled to a motor. The transmission shaft can be driven by the motor to drive the spur gear, the first and second ring gears, and the driving member.

An electric ratchet wrench includes a driving member rotatably mounted in a body for driving a fastener. A pawl device is pivotably mounted to the driving member. First and second ring gears are rotatably mounted around the driving member and mesh with the pawl device. A direction switching rod is pivotably mounted to the driving member. A spur gear is mounted on a transmission shaft rotatably received in the body and meshes with the first and second ring gears. A clutch member is mounted on the transmission shaft and is releasably coupled with another clutch member coupled to a motor. The transmission shaft can be driven by the motor to drive the spur gear, the first and second ring gears, and the driving member.

A crimp tool includes a frame, a lead screw and a nut assembly connected to the lead screw. A spring member is connected to the frame and movable with rotation of the lead screw. A first transducer is connected to the nut assembly to measure a first force applied on the nut assembly. A second transducer is connected to the spring member to measure a second force applied thereon by the spring member.

A crimp tool includes a frame, a lead screw and a nut assembly connected to the lead screw. A spring member is connected to the frame and movable with rotation of the lead screw. A first transducer is connected to the nut assembly to measure a first force applied on the nut assembly. A second transducer is connected to the spring member to measure a second force applied thereon by the spring member.

A drill, drill bit and staples for use in attaching staples to a support by driving two parallel screws in the same direction simultaneously, one held by each side of the staple, so as to secure wiring to the support using the staple. The drill bit includes a central gear and two planetary gears, which gears rotate a screw-driving tool. The drill bit is held by the chuck of a drill and, when its central gear is rotated, rotates the planetary gears that drive the two screws. A harness may used to attach the housing of the drill bit to the drill to prevent rotation of the housing when the central and planetary gears are rotating. The drill may be rotatable from horizontal to vertical, telescoping and permit the bit to be rotated 90 degrees

An instrument is provided for rotatably driving a screw or drill bit into bone in surgery, comprising a gear housing at a distal end of a drive shaft, wherein the drive shaft has a proximal end adapted for connection to a rotational power source, wherein the gear housing comprises at least one pair of bevel gears that direct the rotational force from the drive shaft in an approximately 115-145 angle from the drive shaft to rotatably drive a screw or drill bit into bone during a surgical procedure. The device would advance or retract a drill or driver at a fixed angle in a manner that is user-friendly and ergonomic. The device addresses concerns with modern instrumentation that is cumbersome to use and does not allow the user generated forces to be efficiently applied to the intended trajectories.

A nut temporary tightening device has bearing parts, a first support plate, a second support plate, and socket assemblies. Each bearing part has a cylindrical sleeve extending in an up-down direction and a flange provided at an intermediate portion of the sleeve. The first support plate has a plurality of first support holes that each support a corresponding bearing part along the outer circumference, on an upper end side, of the bearing part. The second support plate has a plurality of second support holes that each support a corresponding bearing part along the outer circumference, on a lower end side, of the bearing part. Each socket assembly has a driving shaft, a driving part, and a socket.