A power unit is configured for use as part of a concrete screed and includes a frame, a powered drive, and a mechanical control connection. The frame includes a drive housing and a handle to be grasped by a user, with the handle being configured to facilitate manual advancement of the concrete screed in a forward direction. The handle includes a grip and a relatively shiftable user-operated drive controller. The powered drive is operably supported by the drive housing and is configured to rotate a rotatable concrete forming drum.

A power unit is configured for use as part of a concrete screed and includes a frame, a powered drive, and a drive coupler. The frame includes a drive housing and a handle to be grasped by a user, with the handle being configured to facilitate manual advancement of the concrete screed in the forward direction. The handle and the drive housing are pivotally attached relative to each other so that the handle is swingable relative to the drive housing about a pivot axis that is transverse to the forward direction. The powered drive is operably supported by the drive housing and includes a rotatable drive shaft. The drive coupler is attached to the drive shaft and is removably attachable to the connection shaft of a rotatable concrete forming drum so that rotation of the drive shaft is imparted to the connection shaft. The drive coupler is configured to align the drive and connection shafts on a common rotation axis without permitting off-axis swinging of the shafts relative to one another, such that swinging of the drive housing relative to the drum is at least substantially restricted.

An oscillation decoupling system does not transmit oscillations, for example, from a drive train of a vehicle to an actuator system for a clutch. A clutch system with the oscillation decoupling system has an adjusting element. The actuator system includes an active element which is designed to carry out an active movement in a predetermined working direction and an element of the oscillation decoupling system which connects the active element to the actuator device and to the adjusting element. The element of the oscillation decoupling system includes, in a predetermined direction of work, a play region in which the active element or the adjusting element moves without the respective other moving element.

A composite/metal joint includes a composite member, a metallic member, a cylindrical liner, and a fastener. The composite member has a first aperture. The metallic member is disposed adjacent to the composite member and has a second aperture coaxially aligned with the first aperture. The cylindrical liner extends longitudinally from a first end to a second end. The cylindrical liner has a cylindrical outer liner surface and a longitudinally extending third aperture coaxial with the first and second apertures and defined by an inner liner surface. The cylindrical liner is disposed in the first and second apertures with the outer liner surface adjacent to aperture walls of the first and second apertures. The cylindrical liner has a plurality of grooves intersecting the outer liner surface. The fastener is disposed through the third aperture of the cylindrical liner and is configured to attach the metallic member to the composite member. An outer surface of the fastener is in direct contact with the inner liner surface.

A stem coupling for a hydrant includes: an upper portion defining an upper portion length from a center of a plurality of break-away features defined in the stem coupling to a first end of the stem coupling; and a lower portion defining an lower portion length from the center of the plurality of break-away features defined in the stem coupling to a second end of the stem coupling distal from the first end of the stem coupling, the lower portion length equaling at least two times the upper portion length.

In a method for assembling a steering system including a first universal joint having a first yoke coupled to an intermediate shaft, a second universal joint having a fourth yoke paired with a third yoke coupled to the intermediate shaft and a shaft attachment portion joined to the fourth yoke and in which a bolt insertion hole allowing a pinion shaft to be clamped is formed, an angle between the intermediate shaft and a steering shaft is set to 1. An around-axis angle of the first yoke in a rotating direction is set to 1, and an angle between the intermediate shaft and the pinion shaft is set to 2. A junction angle between the fourth yoke and the shaft attachment portion in the rotating direction is adjusted to set an around-axis angle of the bolt insertion hole in the rotating direction to a preset angle 2.

Among other things, a digitally controlled actuator has a connector for coupling to a drive mechanism of an existing hand-driven cartridge reloader, to actuate a series of processing cycles of the reloader in which supplies of components are subjected to successive mechanical processing steps to produce reloaded cartridges ready for use. There are sensors associated with the actuator and the reloader to (a) acquire digital information that is indicative of a state of progress of each of the processing cycles and of conditions of the reloader related to the production of the reloaded cartridges, and (b) deliver the digital information to a digital controller for controlling the processing cycles of the reloader. The digital controller is connected to receive the digital information from the sensors and to control automatic operation of the reloader in successive processing cycles to produce reloaded cartridges without requiring human intervention.

A method includes disposing a first shaft and a second shaft in an end to end arrangement, positioning a sleeve over the end to end arrangement, coupling the first shaft to the second shaft via the sleeve and a plurality of shear components that engage the sleeve and partially recess into the first shaft or the second shaft, retaining the plurality of shear components in the partially recessed position via one or more retaining mechanisms, and independently aligning the first shaft and the second shaft while transmitting torsional, translational, or torsional and translational loading through the plurality of shear components and not through the retaining mechanisms.

A gas turbine shaft assembly comprises first and second axially mating shafts. The first shaft has a circumferential array of splines configured to mesh with a corresponding circumferential array of splines on the second shaft. The first shaft defines at least one axially extending slot aligned with one of the splines on the first shaft. The second shaft has at least one radial projection aligned with one of the splines on the second shaft. The engagement of the radial projection with the slot provides angular correspondence between the splines of the first and the second shafts prior to axial engagement of the splines.

A state where the connecting pin is laid across between at least one of the outer diameter side through-holes and the inner diameter side through-hole is maintained by an axial displacement of the connecting pin with respect to the outer diameter side through-hole and the inner diameter side through-hole being regulated based on an engagement between both edges of the connecting pin and a displacement-regulating portion which is a part of the yoke or the bolt.