To provide a chain guide that can improve transportability and assembly operation efficiency, while also ensuring stable running of a timing chain and enhancing durability, with a simple structure. The chain guide has a guide shoe that slidably guides a chain, and a chain guide body that supports the guide shoe. A compression limiter having an attachment hole through which a mounting bolt for attaching the chain guide to an attachment target member passes is fitted in a fixing through hole extending through the chain guide body in a width direction thereof. A compression limiter holding mechanism is provided either to the compression limiter or to a hole rim part including the fixing through hole of the chain guide body in order to hold the compression limiter.

In accordance with one or more embodiments of the invention, nut restrainers, centering tools, and methods of use are presented, particularly as applied to high strength bolted connections. Nut restrainers may have an interior profile including a circular profile section and a regular hexagonal profile section, a nut inserted into the nut restrainer may have lateral freedom of movement, and the nut restrainer may have a top plane with one or more centering protrusions. A centering tool for positioning a nut restrainer may have a non-circular head section, a cylindrical positioning section, a threaded section, and a cylindrical restrainer positioning section; a method of positioning a nut restrainer coaxial with a bolt hole using the centering tool.

A fastening system to couple a first aircraft structure and a second aircraft structure is disclosed. The fastening system includes a fastener, a nutplate having a body defining an opening to receive the fastener, a flange extending from the body to engage an outer surface of the first structure, and a first sleeve protruding from the flange in a direction away from the body, the first sleeve to couple to a first bore formed in the first structure and prevents rotation of the nutplate relative to the first structure.

An assembly comprising first and second structural elements having aligned holes, a fastener that occupies at least respective portions of the holes without a surrounding sleeve, and a mating part that is coupled to the fastener. The fastener comprises: a head; a circular cylindrical shank extending from the head; a mating portion comprising external projections; and a transition portion disposed between the shank and the mating portion. The transition portion comprises a tapered lead-in section that meets the shank at a shank/lead-in intersection and a radiused lead-in section that meets the tapered lead-in section. The tapered lead-in section tapers gradually in a first axial direction toward the mating portion and has a first profile that is linear and a taper angle equal to or less than 20 degrees, while the radiused lead-in section curves abruptly in the first axial direction and has a second profile that is a circular arc having a radius.

A housing element for applications in the manufacturing industry having a casing and a cover both made of metallic material, wherein the casing is provided with a groove and a flat mounting surface and the cover is provided with an end portion having a frustoconical side wall, an oblique annular bottom wall, and a securing system consisting in inserting the end portion of the cover inside the groove of the casing, wherein an interference (i) between a radially outer end of the end portion of the cover and a radially inner end of the flat mounting surface of the casing assumes values of between 0.2 mm and 0.5 mm and an angle (δ) defined between the frustoconical side wall of the end portion of the cover and the flat mounting surface of the casing assumes values of between 45° and 80°. The interference and the angle facilitate the insertion of the end portion of the cover inside the groove of the casing.

A screw for a touch-proof plug connection includes a screw body and a touch protection device. The screw body has a screw head and a screw shank extending from the screw head along a screw-in direction to a screw tip. The screw tip has a connecting element. The touch protection element has a connection device on a coupling side. The connection device is a connection counterpart to the connecting element and connects the touch protection element to the screw body. The touch protection element has an electrically insulating surface on a front side that points in the screw-in direction in a connected state of the screw body and the touch protection element.

The invention provides a radially expanding fastener/alignment plug assembly for use with a torque power tool, the assembly including: a sleeve member (10), insertable into a hole of an object, having radial expansion elements with inner surface portions which are tapered towards a first end; an expanding member (20), insertable in the sleeve member, having an outer surface portion which is tapered towards a first end, cooperating with the inner tapered surface portions of the radial expansion elements of the sleeve member; and a displacement member (30) formed between a second end of the sleeve member and a second end of the expanding member. Advantageously, the assembly is self-reacting allowing an actuation torque to be applied to and reacted upon to create high levels of pulling and expansion force without the need for an external reaction point.

According to the invention, there is provided a magnetic wear liner (10) for protecting an underlying metallic surface (12) of a materials handling device from wear or damage during use. The magnetic wear liner includes a substantially rigid base (16) and one or more wear lining tiles (18) disposed on one side of the rigid base. The magnetic wear liner further includes one or more magnet devices (26) engageable with the rigid base such that a selective portion of the wear liner (10) is magnetically attracted to the underlying metallic surface.

A connection device that facilitates easy manual connector assembly and disassembly, however, having the ability to semi securely hold the connectors together with a progressive frictional interference fit that can be disassembled with some additional manual frictional force, further, the connector assembly can desirably have a rotational lock interface to prevent inadvertent relative rotation between the connector assembly, in addition the connector assembly would have piloting interface to add bending moment resistance to the connector interface.

A multi-mount assembly disposed on a fastening structure that has a U-type rail is provided. The multi-mount assembly includes a main body having a quadrilateral rail, a positioning hole, and a passage. The quadrilateral rail is disposed along a periphery of the main body. The positioning hole is in a side of the main body facing away from the fastening structure. The passage is spatially communicated with a first edge and a second edge of the main body, in which the first edge is opposite the second edge. The main body is configured to enter an opening of the U-type rail of the fastening structure such that three sides of the quadrilateral rail are coupled to the U-type rail. The positioning hole is configured to enable a protruding element to pass therethrough.