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.

Embodiments of the present disclosure provide a control system including: a power wrench; and a controller operatively connected to the power wrench, wherein the controller is configured to perform actions including: directing an operative head of the power wrench to turn in response to a pressure-angle derivative of the operative head being below a predetermined threshold, defining an origin at an angular position of the operative head where the pressure-angle derivative of the operative head exceeds the predetermined threshold, directing the operative head to turn by an angular step in response to: the pressure-angle derivative of the operative head exceeding the predetermined threshold, and an angular differential of the operative head being less than a target value; and directing the operative head to cease turning in response to the angular differential of the operative head being approximately equal to or greater than the target value.

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 pneumatic ratchet wrench includes a main body formed with a receiving chamber, a head unit, a driving unit and an air motor. The head unit defines a gas passage, and includes a ring portion and a frame portion. The ring portion includes an exit in spatial communication with the gas passage and opens toward the frame portion. The driving unit includes a driving head, and a transmission shaft mounted in the head unit. The air motor drives the transmission shaft and includes a cylinder and a rotor. The cylinder includes a venting hole allowing gas produced in the cylinder to pass through the venting hole and the gas passage and to exit from the exit to be blown toward the frame portion.

A fluid-operated, reciprocating piston-style torque wrench and a method of operating the same. The wrench may have pump controls coupled to the torque wrench. The pump controls may be connected to a handle assembly that is coupled to the torque wrench. The handle assembly may include sensors to require two hand operation of the pump controls.

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 preferred embodiment of the present invention is directed to a rotary tool and, more specifically, to a pneumatic wrench that can be used as both a standard socket wrench and as a fastening tool for setting HI-LOK-type fasteners commonly used in the aviation industry. In a preferred embodiment, the wrench comprises a handle and a rotational member connected to the handle, said rotational member configured for exerting torque about an axis of rotation in one direction only. The wrench further comprises a hole extending through the rotational member along the axis of rotation. The hole has two ends each having female threads. One end has right-hand threads and the second end has left-hand threads. The tool further comprises socket adaptors having right-hand and left-hand male threads for attaching the adaptors to the wrench. Each socket adaptor also has a through hole that aligns with the hole in the rotational member. The holes allow a hex key to be inserted through the wrench so that the wrench can be used to fasten HI-LOK fasteners. The simple design of the tool results in a wrench that is easy to use and relatively inexpensive to manufacture. A preferred embodiment of the invention further comprises a method of using the wrench.

A uniquely designed torque wrench having a torque body, the torque body attached to a frictional squeezing clamp, and a lug socket which is rotationally connected to the frictional squeezing clamp. The frictional squeezing clamp entering a contracted stated during extension of a rod of a hydraulic cylinder, and entering an expanded state during the retraction of the rod of a hydraulic cylinder, the lug socket turning the wing nut of a hammer union.

A hand-held knockout driver includes a main housing having a handle portion, a motor positioned within the main housing, a pump assembly driven by the motor, and a secondary housing coupled to the main housing and defining a bore therein. The hand-held knockout driver also includes a working piston moveable within the bore from a rest position to an actuated position to define a piston throw distance therebetween. The hand-held knockout driver also includes a draw stud coupled to the working piston, a die coupled to the secondary housing, and a punch coupled to the draw stud opposite the working piston for movement therewith relative to the die. The die has a depth greater than the piston throw distance.

A low clearance hydraulic torque tool for tightening or loosening fasteners has an apparatus to transfer torque formed within a link drive means between a first and a second side plate. The apparatus includes: a drive plate having piston engagement means at a first end and a machined face gear with radial serrations at a second end; a ratchet drive having a machined face gear with corresponding radial serrations at a first end and a threaded fastener engagement means at a second end; and a wave spring formed between the drive plate and one of the side plates of the torque tool. The side plates of the link drive means are tapered from a first end, adjacent piston engagement means, to a second end, adjacent the threaded fastener engagement means, such that the width of the link drive means at the second end is substantially thinner than the width of the link drive means at the first end.