A unidirectional-driven drug infusion device, includes: a reservoir, a piston and a screw, the piston is arranged in the reservoir; a driving module which includes at least one driving wheel and at least one driving arm that cooperate with each other, the circumferential surface of the driving wheel is provided with wheel teeth; a power module coupled to the driving arm; a control module, connected to the power module, controls the power module to apply different driving powers to the driving arm, making the driving arm perform linear reciprocating motion; and a friction member which is in contact with the surface of the driving wheel. This device can fully utilize the internal space of the infusion device, and its weight and volume is reduced.

A torque fastening system and method for applying torque to secure a fastener, includes actuating a torque tool to provide an initial command torque value to the servo drive of an electric motor for applying torque to a fastener. The initial command torque value is less than a target command torque value corresponding to a desired maximum target torque value entered by an operator. The torque fastening system operates at the initial command torque value to rotate a threaded fastener. Thereafter, in response to a spike in torque that corresponds to a decrease in motor speed, the torque tool output changes from the initial command torque value to a jump command torque value having a greater power value to increase torque applied by the torque tool to a fastener. The command torque value is ramped from the jump command torque value toward the target command torque value to increase the torque provided by the torque tool.

A portable shippable automated calibration system for high torque power tools is disclosed. The system includes a self-contained highly durable and shippable container that may comprise a power source, central processor, visual user interface, mechanical interface for coupling with power tools to be calibrated, communications systems for communicating with a power tool being calibrated and/or with on-site or cloud based data systems. The system may be delivered to sites desiring on-site power tool calibration, tools are calibrated and updated calibration factors are automatically uploaded into the calibrated tool and a calibration certificate is published with the particulars of the calibration completion.

The present disclosure generally relates to apparatus, systems, and kits of parts for knock-down heavy-duty transportable torque tool assemblies capable of onsite field-servicing of high-pressure heavy-duty hydraulic cylinders used in heavy-duty construction equipment and industrial machinery. The embodiments disclosed herein pertain to assemblies comprising modular knock-down components that may be mounted onto the bed of a field service truck and configured as needed to provide loosening and retorquing of piston-retaining nuts.

A torque transfer device is provided to transfer torque from a torque tool to a torque limiter device, the torque transfer device comprising a torque limiter connection member adapted for connection to the torque limiter device; a first joint; a second joint; and a tool connection member adapted for connection to the torque tool, wherein the first joint and the second joint are configured to lock responsive to activation of the torque tool to transfer a reaction torque generated by the torque tool to the torque limiter device, and wherein the first joint and the second joint are configured to unlock responsive to deactivation of the torque tool to enable rotation between the torque tool and the torque limiter device along a first axis and a second axis different from the first axis.

Presented herein are torque limiting drive tools for use with, for example, components of a medical device. A torque limiting drive tool in accordance with aspects presented herein comprises an elongate handle/body and a plurality of torque arms located at a distal end of the handle, where the plurality of torque arms define an opening configured to longitudinally (axially) receive a drive bit. The plurality of torque arms are each directly mechanically attached to the handle and are configured to exert a torque on the drive bit in direct response to rotation of the elongate body in each of a first direction of rotation and a second direction of rotation.

A torque wrench assembly comprises a torque wrench and a reaction arm and locking means for locking together the torque wrench and the reaction arm. The locking means comprises a connection member located on the torque wrench; an opening on the reaction arm for receipt of the connection member of the torque wrench; a locking member slidably mounted in a channel on the reaction arm, the locking member including an aperture sized to allow the connection member to pass therethrough; and biasing means arranged to bias the locking member into a position wherein the aperture is partially aligned with the opening. The connection member has an insertion end for insertion into the opening of the reaction arm, and immediately adjacent the insertion end is a recess. The recess is shaped to receive a part of the locking member.

A device for screwing and unscrewing bolts and screws uses a motor-driven screwdriving tool, which is preferably used in the track region of railroad facilities. The device makes it possible to screw and unscrew screws, nuts and bolts reliably and effectively, preferably in the context of railroad use. The appliance is intended to have a low weight and a high output over long periods of use, can be operated with one hand, is specifically pre-oriented to the various applications and has a modular construction. To this end, the device has a central rib which serves as a receptacle for all of the attachments and fittings to be installed in a modular manner.

Method of removing a valve cap threadedly engaged with a valve body includes inserting at least one coupling rod from a cap adapter through a valve cap attachment hole to couple the structures, coupling an output drive of a torque multiplier with the adapter, and exerting an input torque on the torque multiplier to rotate the adapter and valve cap, the input torque exerted on the torque multiplier being increased by the torque multiplier.

A retaining ring configured for in-field repair of a fuel injector sleeve upper seal leak, comprising: a circular side wall comprising a barrel-shaped outer surface and a substantially cylindrical inner surface; wherein the outer surface comprises a lower curved portion and a central portion having a curvature that is less pronounced than the lower curved portion; and wherein the lower curved portion is configured to guide the retaining ring into the fuel injector sleeve and the circular side wall has an outer diameter at the central portion that is larger than an inner diameter of the fuel injector sleeve at a location of the upper seal leak such that the retaining ring forces the fuel injector sleeve outwardly at the location of the upper seal leak as the retaining ring is moved into an installed position.