An apparatus for precisely measuring and applying torque and angle of rotation to tighten screwed fasteners. The apparatus includes a drive motor for generating a rotation, a pair of spaced triggers for activating the operation of the drive motor, and a controller for precisely measuring the torque to be applied and angle of rotation to be achieved by the apparatus, the controller not permitting the motor to be activated without both of the triggers being activated. A reduction gear system is also provided for reducing a rate of rotation generated by the motor, the reduction gear system outputting a rotational drive torque for driving the screwed fastener.

A surgical tool for removing a portion of an implant is provided that includes a housing, a motor contained within the housing and coupled to the housing, and an output shaft having a distal end and a proximal end opposite the distal end, wherein the proximal end is coupled to the motor and the distal end has an opening configured to rotateably engage an implant. The surgical tool further includes a counter-torque sleeve extending around the output shaft having a proximal end and a distal end opposite the proximal end, wherein the proximal end is coupled to the housing and the distal end is configured to couple to the implant relative to the counter-torque sleeve. Upon a rotational force to the implant, the forces transmitted by the output shaft and the counter-torque sleeve are balanced by the coupling of the output shaft and counter-torque sleeve through the housing.

A torque capacity expandable device and method for a torque multiplier are introduced. The device includes a connection sleeve and a torque multiplier. The connection sleeve, fitted to a torque wrench and the torque multiplier and fastened, has a force-applied end corresponding in dimensions to a force-applying end of the torque wrench and has another end corresponding in dimensions to the force-applied end of the torque multiplier. An integral fastening mechanism is integrally fitted to or formed with each of the two ends of the torque multiplier. Its force-applied end fastening mechanism has the same dimensions as the force-applying end fastening mechanism of connection sleeve. Its force-applying end fastening mechanism has the same dimensions as the force-applied end fastening mechanism of a reaction arm disposed at the force-applying end fastening mechanism of torque multiplier.

An apparatus for precisely measuring and applying torque and angle of rotation to tighten screwed fasteners. The apparatus includes a drive motor for generating a rotation, a pair of spaced triggers for activating the operation of the drive motor, and a controller for precisely measuring the torque to be applied and angle of rotation to be achieved by the apparatus, the controller not permitting the motor to be activated without both of the triggers being activated. A reduction gear system is also provided for reducing a rate of rotation generated by the motor, the reduction gear system outputting a rotational drive torque for driving the screwed fastener.

A high reliability drug infusion device, includes: a drug storage unit including a drug outlet; a screw connected to a piston and a driving wheel provided with wheel teeth, respectively, the driving wheel drives the screw to move by rotation, pushing the piston forward; at least one driving unit cooperating with the driving wheel, the driving unit includes at least one driving portion a power unit and a reset unit connected to the driving unit, and the reset unit includes an elastic reset component and a linear-actuated reset component, and the elastic reset component alone applies a force to or together with the linear-actuated reset component to control the reset movement of the driving unit. The high reliability drug infusion can be used for improving the reliability and increasing the user's flexibility in choosing the infusion method.

A unilateral-driven patch-type drug infusion device, includes: an infusion unit, which includes a drug storage unit; a screw connected to a piston and a driving wheel provided with wheel teeth, respectively, the driving wheel drives the screw to move by rotation, pushing the piston forward; at least one driving unit cooperating with the driving wheel, the driving unit includes at least one driving portion; a power unit and a reset unit coupled to the driving unit, and an infusion tube structure, which includes a base and an infusion needle, and the base includes an initial position, a working position, and an intermediate position. This infusion device can output controllable and stable driving force, which eliminates safety hazards and improves user experience.

This invention discloses a drug infusion device, including: a drug storage unit; a piston and a driving wheel respectively connected with a screw, the driving wheel drives the screw to move by rotation, the piston is arranged in the drug storage unit, the screw advances the piston to move; a driving unit cooperating with the driving wheel, the driving unit includes more than two driving arms, the driving unit, through the multiple pivoting movement modes, drives driving arms to perform tooth number adjustable driving on the driving wheel for increment-adjustable infusion; and a power unit connected to the driving unit, the power unit exerts a force on the driving unit to lead the driving unit to perform a plurality of pivot steps. More than two driving arms are stalled on the driving unit, thereby achieving multi-level engagement on the driving wheel, and finally achieving the purpose of increment-adjustable infusion.

Interchangeable reaction washer initially penetrates with outward bottom serration edges only during manual pre tightening. Slippage is thereby avoided at begin of the consecutive power torque wrench assisted full tightening of the nut and/or bolt head resting on it. As the load ramps up, the reaction washer flattens out and the bottom serrations gradually penetrate radially inwards. Reaction and actuation sockets of varying sizes matching a broad range of reaction washers and nut and/or bolt heads may be interchangeably snapped on a reaction coupling connected to the torque wrench housing. A clearance undercut underneath the reaction washer torque receiving flanges absorbs eventual debris to further assist unimpeded and fast coupling of the system. Radially oriented contact faces between reaction washer and reaction socket provide a snug contact unaffected by their toroidal movement during washer flattening and a force transfer free of radial force components.

A dual positionable adaptor for a fastener driver assembly employs a tandem guide assembly mounted to a guide head which has an entry reference surface defining an opening for a fastener to provide a proper location and entry angle for the fastener. A pair of wings each defines a pair of reference engagement edges which engage either an upper horizontal member or a lower horizontal member. The wings, together with the entry reference surface, define a proper entry location and angle for connecting a vertical stud to either an upper plate or a lower plate. The selected adaptor position is achieved by securing the adaptor in one of two angular positions relative to the tube axis of the fastener driver assembly. The wings are also affixed with squirrel claws to lock the adaptor in place for installing the fastener. The adaptor also includes flush indicators to indicate that the proper flush position of the reference surface against the vertical member is achieved. The wings are independently pivotal to accommodate situations wherein the tandem wing configuration cannot be employed. The fastener is retained within the adaptor fastener channel via a magnet assembly.

A multifunctional torque wrench includes a main body, an operation member, and an indication device. The main body has a driving portion, a combination portion, and a twisting portion. The driving portion pivotally drives a fastener to rotate about an axis passing through the main body. The operation member is switchable between a first position and a second position with respect to the main body. The extension portion extends along a second axis. When the operation member is at the first position, the second axis is vertical to the first axis, allowing a user to turn the main body to generate the torque for driving a fastener. The indication device is disposed between the main body and the operation member for displaying the torque value. When the operation member is at the second position, the second axis is parallel to the first axis for storage.