A power tool, in particular a hand-held power tool, preferably embodied as a cordless screwdriver, is equipped with a torque limiting unit in which the release torque is settable by way of a locking brace that is equipped with a spring brace for locking elements that abut axially against parts of a planetary drive, in particular the ring gear thereof or the planet carrier thereof as a last gear stage, the spring elements of the spring brace and the locking elements being located with a radial offset from one another.

A rotary power tool including a gear case, an output shaft extending from the gear case, and a drive mechanism configured to provide torque to the output shaft, causing the output shaft to rotate. The rotary power tool further includes a clutch mechanism between the output shaft and the drive mechanism. The clutch mechanism includes a compression spring and is configured to limit the amount of torque provided by the output shaft. The rotary power tool further includes a sensor positioned on a neck portion of the gear case subject to strain imparted by the compression spring, and an electronic control unit configured to receive an output signal from the strain gauge and determine a torque setting of the clutch mechanism based on the output signal.

A hand tool for fastening a fastener, such as a screw. The hand tool comprises a handle and a rotatable fastening head connected to a first end of the handle, and engaged with a manually driven actuator. The hand tool further comprises a fixed fastening head connected to a second end of the handle, which is configured to apply a configurable fastening torque to the fastener The fixed fastening head is selectively pivotable with respect to the handle about an axis parallel to the center axis of the fixed fastening head.

It is an object of the invention to provide a technique for enhancing the operability of a power tool. A representative screwdriver 100 is provided which has a motor 110 and a driving mechanism 120. The driving mechanism 120 has a rotation transmitting mechanism including a driving cam 137 and a driven cam 157, and a cam engagement state is switched by movement of the spindle 150 in a longitudinal direction of the spindle. The position of the spindle 150 in the longitudinal direction is detected by a detecting mechanism 162 that is disposed on the opposite side of the rotation transmitting mechanism from a front end region in the longitudinal direction of the spindle 150. A controller 180 controls the rotation speed of the motor 110 based on the detection result of the detecting mechanism 162 and drives the motor 110.

A transducer assembly for use in a power tool including a housing, a motor, an output shaft that drives a workpiece about a central axis, and a transmission. The transducer assembly includes a transducer positioned between the motor and the transmission. The transducer including an inner hub being rotationally affixed to the housing, an outer rim affixed to a rotatable component of the transmission, a plurality of webs extending radially outward from the inner hub to the outer rim, and a sensor affixed to each of the webs for detecting strain of each of the webs in response to a reaction torque applied to the transmission from the output shaft. A width of each of the webs gradually tapers from at least one of the outer rim or the inner hub toward a midpoint of each of the webs in a direction perpendicular to the central axis.

Disposable torque-limiting mechanisms with upper shank component with a torque-limiting interface, a lower shank component with a torque-limiting interface, and a washer assembly biasing element. Torque-limiting interfaces having a plurality of undulations arranged around an axial bore or drive socket and separated by a plurality of transition regions, with each undulation having an upslope, a peak, and a downslope. The torque-limiting interfaces are configured to engage and disengage to provide torque transmission with predetermined torque limits at various rotational speeds and for amounts of actuations while remaining within a specified operational range.

Wrenches, apparatus, devices and methods of using a T handle with a torque wrench with adjustable torque setting controls having an automated slip function for applications such as for motorcycles, automotive, machinery and the like. The wrench allows for a user to pull up a lock feature which allows the user to selectively set a torque value by rotating the handle. Once a torque setting is made, the lock is pushed down and the wrench can be used to tighten fasteners, such as bolts, nuts, and the like. While tightening, the fastener, the wrench goes into a slip function when the setting has been reached, so that the fasteners, cannot be stripped.

Described herein are devices and mechanisms for effective and streamlined ratcheting of handheld medical devices, for example, medical ratcheting screwdrivers. In some embodiments, a ratcheting mechanism is included, which comprises a moveable component, which can comprise a plurality of teeth, an engagement component comprising a plurality of protrusions configured to engage with the teeth, and a toggle collar between the moveable component and the engagement component. In some embodiments the toggle collar comprises stops configured to engage the protrusions and configured to toggle the ratcheting mechanism between modes allowing transmission of torque and force in a first rotational direction, but disallowing it in a second rotational direction and a mode allowing transmission of torque and force in the second rotational direction, but disallowing it in the first rotational direction.

A torque connector structure includes a first body, a second body assembled with the first body, a first drive member assembled with the first body, a second drive member received in the first body and having a plurality of first receiving grooves each having a cylindrical shape, a third drive member received in the first body and the second body, a fourth drive member mounted on the third drive member and having a plurality of second receiving grooves, an elastic member biased between the first drive member and the second drive member, and a plurality of pins received between the first receiving grooves and the second receiving grooves. The second drive member and the first drive member are driven simultaneously.

The present invention relates to the field of combination rotary tools, more in particular in the combination of screwdrivers and drills. In particular, the invention relates to a sleeve member having a hollow portion adapted to embrace a drill, and comprising a bolt- or screw-fitting unit. More in particular, in the context of the present invention said sleeve member is provided with a built-in mechanism for torque limitation.