An assembly for bending a conduit and a portable conduit bender. The assembly may generally include a portable bender including a base having a base surface supportable on a work surface, a housing supported by the base and defining a housing axis, the housing including a handle engageable by an operator to carry the bender, and a shoe supported by the housing for pivoting movement about the housing axis, the shoe defining a channel for supporting a conduit to be bent; and a pipe threader removably supported by the housing, the threader being operable to pivotably drive the shoe relative to the housing to bend the conduit.

A metal pipe including a curved portion produced by bending in which a plurality of non-bending surfaces and a plurality of bent portions at which the non-bending surfaces are connected in a bending manner are provided on a circumferential surface on an inside being a curvature center side of the curved portion. With this pipe, a good appearance can be maintained, and stagnation and resistance of a flow of a fluid can be reduced on the inner surface side of the pipe where the fluid flows.

A metal pipe including a curved portion produced by bending in which a plurality of non-bending surfaces and a plurality of bent portions at which the non-bending surfaces are connected in a bending manner are provided on a circumferential surface on an inside being a curvature center side of the curved portion. With this pipe, a good appearance can be maintained, and stagnation and resistance of a flow of a fluid can be reduced on the inner surface side of the pipe where the fluid flows.

The present disclosure relates to an adjustment device for adjusting a bending angle of a stand for a display device. The adjustment device includes a base on which a stand useable for a display device is to be seated, a plate including a first plate provided to support the base and a second plate provided to be movable toward the first plate, a block formed to protrude from the second plate toward the first plate, and a crank having a first end formed so that as the first end is pressed by the block moving together with the second plate toward the first plate, a second end of the crank presses an inner surface of the stand in order to adjust an angle of the stand.

The present disclosure relates to an adjustment device for adjusting a bending angle of a stand for a display device. The adjustment device includes a base on which a stand useable for a display device is to be seated, a plate including a first plate provided to support the base and a second plate provided to be movable toward the first plate, a block formed to protrude from the second plate toward the first plate, and a crank having a first end formed so that as the first end is pressed by the block moving together with the second plate toward the first plate, a second end of the crank presses an inner surface of the stand in order to adjust an angle of the stand.

A mine bolt bending system includes a frame comprising a plurality of bolt receiving portions each configured to receive and hold a mine roof bolt, a bolt contact member secured to the frame, with the bolt contact member rotatable relative to the frame between a first position and second position, and an actuator secured to the frame, with the actuator configured to move the bolt contact member between the first and second positions. The bolt contact member is configured to bend a mine bolt when rotating from the first position to the second position.

A mine bolt bending system includes a frame comprising a plurality of bolt receiving portions each configured to receive and hold a mine roof bolt, a bolt contact member secured to the frame, with the bolt contact member rotatable relative to the frame between a first position and second position, and an actuator secured to the frame, with the actuator configured to move the bolt contact member between the first and second positions. The bolt contact member is configured to bend a mine bolt when rotating from the first position to the second position.

A metal bend pipe having a bend portion bent in a semi-circular arc shape is provided, in which an identification part that enables one of the two end portions of the bend portion to be identified as the bending-start side or the bending-end side is provided, and the identification part is integrally formed as a protruding and/or recessed three-dimensional region. Thus, it is possible to easily and reliably identify which of the two end portions of the bend portion is the bending-start side or the bending-end side.

A metal bend pipe having a bend portion bent in a semi-circular arc shape is provided, in which an identification part that enables one of the two end portions of the bend portion to be identified as the bending-start side or the bending-end side is provided, and the identification part is integrally formed as a protruding and/or recessed three-dimensional region. Thus, it is possible to easily and reliably identify which of the two end portions of the bend portion is the bending-start side or the bending-end side.

A mandrel 10 for producing a thin-walled bent tube having a bending portion with high strength and a small radius of curvature by rotary draw bending without either cracks in an outside of bend or winkles and buckling in an inside of bend occurring includes a shank 14, a connection mechanism 15 and a mandrel ball 16. In a cross-section orthogonal to an axial direction of the mandrel ball 16 at a central position in the axial direction of the mandrel ball 16, the mandrel ball 16 has a first position 19 and a second position 20 at which a first straight line m that passes through a mandrel ball center 17 meets an outer periphery 21 of the mandrel ball. Further, a ratio (L.sub.1/L.sub.2) between a dimension L.sub.1 from the mandrel ball center 17 to the first position 19 and a dimension L.sub.2 from the mandrel ball center 17 to the second position 20 is in a range of 0.915 to 0.976.