Various embodiments of a curved-tip screwdriver bit are presented. The bit may include a shank, a body connected with the shank, and a tip disposed at an end of the body. The tip may include curved blades that project from the end of the shaft. A first curved blade may have a first arc shaped cross section. A second curved blade may have a second arc shaped cross section. A radius of the second arc-shaped cross section may be greater than a radius of the first arc-shaped cross section of the first curved blade.

A monitoring device for a pipe system includes a housing, a housing fastener, and a strap assembly. The housing is configured to mount on an exterior surface of a pipe element of the pipe system. The strap assembly is coupled to the housing with the housing fastener, and the housing fastener is received within the housing to secure the strap assembly to the housing. The strap assembly includes a first strap and a second strap, each of the first strap and the second strap including a mounting end, an adjusting end, and an intermediate portion. The first strap includes an insert tab proximate to the first adjusting end, and the second strap includes a plurality of adjustment slots sized to lockably receive a portion of the insert tab. The insert tab is lockably coupled to the second strap when the monitoring device is tightened.

The present invention provides a stud and tool to remove the same.

A valve includes a set screw that is screwable into and out of a complementary female threaded opening in a valve part for changing a setting of the valve, for changing an adjustable flow restriction of the valve, in which the set screw includes a free outer end that projects outside the valve part, and a gripping part on its free outer end for a tool to be engageable thereupon. The free outer end of the set screw includes a male thread onto which a locking nut is screwed. A protective cap is provided for covering the free outer end, that includes a first cap portion with a rotation space for fitting freely rotatable over the locking nut, and a second cap portion with a complementary female thread that is screwed onto the male thread towards a locked position.

A bolt arrangement that includes a bolt having an outer circumferential peripheral surface extending in a longitudinal direction of the bolt, and a sleeve providing an outer circumferential peripheral surface and an inner circumferential peripheral surface extending in a longitudinal direction of the sleeve. The inner peripheral surface has a tapering profile in its longitudinal direction. A portion of the outer peripheral surface of the bolt provides a corresponding tapering profile matching the tapering profile of the inner peripheral surface of the sleeve. Furthermore, the inner peripheral surface of the sleeve further includes a groove. A coupling arrangement and a method of dismounting a coupling arrangement is also provided.

A removable tire stud of the present disclosure provides a stud and tool to remove the same. The removable tire stud includes a solid hexagonal shaped head portion having a top surface, the head portion being continuous with a shank portion. The shank portion including an unthreaded neck proximal to the head and a threaded portion with a blunt tip. The thread extends from the blunt tip to the unthreaded neck, and a first portion of the thread is sharpened to cut through rubber of a tire. A notched flange is fixed to the head portion proximal to the shank portion. The notched flange has two diametrically opposed notches in an outer edge thereof, and each notch is centered on a vertex of the hexagonal shaped head.

A bolt tensioning assembly has a bolt with a first end portion and a second end portion at an opposite side of the bolt. The first end portion has an enlarged diameter to form a counter-pressure surface facing the second end portion. The first end portion has external threads to receive a lock nut. A hydraulic bolt tensioning device is for tensioning of the bolt. The hydraulic bolt tensioning device is arranged for enclosing a portion of the bolt such that it abuts the counter pressure surface. A lock nut is arranged on the first end portion of the bolt. The hydraulic bolt tensioning device and lock nut are dimensioned such that upon tightening of the lock nut, the lock nut will tighten against a portion of the hydraulic bolt tensioning device.

Various embodiments described herein provide a fastener system having straight walled driving surfaces that provides a reliable stick fit feature, while also improving stability of engagement between the system components. A feature of the new system is to allow stick fit engagement of existing standard straight walled drivers in the new system.

A fastening assembly having torquing members that engage notches on a conical securing member. The torquing members being operable by a wrench and able to exert torque on the securing member at the notches to tighten or loosen the securing member.

A system for connecting a wheel rim to a hub flange of a motor vehicle, having a fastener such a threaded nut or bolt, and a tool which engages the fastener in a positive-locking manner in order to tighten or release the fastener. To provide improved protection against theft of wheel rims and tires, the fastener has an annular groove extending axially from an end surface of the fastener, the groove having an annular base and inner and outer sidewalls shaped to form an undercut wider than an opening of the groove, a recess extending axially below the base for receiving a projection of a complementally-shaped key on the tool to allow rotation of the fastener. The undercut prevents an unauthorized person using a mold-making material, from being able to make an imprint of the groove and producing a tool therefrom to release the fastener.