A coupling has: a first coupler rotatable about an axis and defining first connections distributed about the axis; a second coupler defining second connections distributed about the axis, the second connections offset from the first connections; and segments distributed about the axis and extending radially from the first connections to the second connections, a segment of the segments having a first end engaging a first connection of the first connections and a second end engaging a second connection of the second connections, the first end circumferentially offset from the second end, a face of the segment abutting against a face of the first coupler when the segment is inserted into the first connection in a first orientation such that a penetration depth of the segment into the first connection in the first orientation is less than the penetration depth in a second orientation opposite the first orientation.

Described herein are systems, modes, and methods for mounting one or more electronic housings to each other and to a rack mount system, a table mount system, or wall mount system. The mounting system includes a first pair of matching sliding panels that interface with each other in a slidingly engaging manner. Each of the first pair of sliding panels can be mounted to housings prior to being engaged with each other; the engagement of the first pair of sliding panels removably fixes the two housings together; additional housings can be fixed to the first two in a substantially similar manner. The first pair of sliding panels includes a U-shaped sliding panel and a C-shaped sliding panel, and according to a second embodiment, a second pair of sliding panels includes a C-shaped sliding panel and a Pi-shaped sliding panel. The second pair of sliding panels operates in a substantially similar manner as the first pair of sliding panels.

A device which can slide up and down on a chain or cable, can be loosened to attach to the chain or cable, but does not have any parts that come free when the part is loosened. The device includes first and second pieces, each made of structural material, the first and second pieces fitting together at concave and convex surfaces, to form an interlock forms inner surfaces with a through hole of a first shape that can slide along either a cable or a chain.

A mechanism for connecting two beams comprises a left beam and a right beam. The left beam is formed by an upper cross bar, a lower cross bar, and a vertical plate, the vertical plate has a width greater than a width of the upper cross bar and a width of the lower cross bar, the vertical plate has two edges protruding laterally away from the upper cross bar and the lower cross bar; the right beam has a vertical socket for receiving the vertical plate, the vertical socket is connected to the upper cross bar and to the lower cross bar, the vertical socket has two opposing curled lateral edges protruding laterally away from the upper cross bar and the lower cross bar, the two protruding edges of the vertical plate are inserted between the two opposite curled edges of the vertical socket.

A coupling has: a first coupler rotatable about an axis and defining first connections distributed about the axis; a second coupler defining second connections distributed about the axis, the second connections offset from the first connections; and segments distributed about the axis and extending radially from the first connections to the second connections, a segment of the segments having a first end engaging a first connection of the first connections and a second end engaging a second connection of the second connections, the first end circumferentially offset from the second end, a face of the segment abutting against a face of the first coupler when the segment is inserted into the first connection in a first orientation such that a penetration depth of the segment into the first connection in the first orientation is less than the penetration depth in a second orientation opposite the first orientation.

A rod assembly for a fluid pressure cylinder includes a rod member and a packing that is mounted on an outer circumferential part of the rod member and slides along a slide hole. Assembly is simple because a conventional hard piston is not used. The assembly can be carried out simply by hand without the use of a dedicated tool. Thus, the rod assembly simplifies assembly work.

Described herein are systems, modes, and methods for mounting one or more electronic housings to each other and to a rack mount system, a table mount system, or wall mount system. The mounting system includes a first pair of matching sliding panels that interface with each other in a slidingly engaging manner. Each of the first pair of sliding panels can be mounted to housings prior to being engaged with each other; the engagement of the first pair of sliding panels removably fixes the two housings together; additional housings can be fixed to the first two in a substantially similar manner. The first pair of sliding panels includes a U-shaped sliding panel and a C-shaped sliding panel, and according to a second embodiment, a second pair of sliding panels includes a C-shaped sliding panel and a Pi-shaped sliding panel. The second pair of sliding panels operates in a substantially similar manner as the first pair of sliding panels.

Described herein are systems, modes, and methods for mounting one or more electronic housings to each other and to a rack mount system, a table mount system, or wall mount system. The mounting system includes a first pair of matching sliding panels that interface with each other in a slidingly engaging manner. Each of the first pair of sliding panels can be mounted to housings prior to being engaged with each other; the engagement of the first pair of sliding panels removably fixes the two housings together; additional housings can be fixed to the first two in a substantially similar manner. The first pair of sliding panels includes a U-shaped sliding panel and a C-shaped sliding panel, and according to a second embodiment, a second pair of sliding panels includes a C-shaped sliding panel and a Pi-shaped sliding panel. The second pair of sliding panels operates in a substantially similar manner as the first pair of sliding panels.

A rod assembly for a fluid pressure cylinder includes a rod member and a packing that is mounted on an outer circumferential part of the rod member and slides along a slide hole. Assembly is simple because a conventional hard piston is not used. The assembly can be carried out simply by hand without the use of a dedicated tool. Thus, the rod assembly simplifies assembly work.

Described herein are systems, modes, and methods for mounting one or more electronic housings to each other and to a rack mount system, a table mount system, or wall mount system. The mounting system includes a first pair of matching sliding panels that interface with each other in a slidingly engaging manner. Each of the first pair of sliding panels can be mounted to housings prior to being engaged with each other; the engagement of the first pair of sliding panels removably fixes the two housings together; additional housings can be fixed to the first two in a substantially similar manner. The first pair of sliding panels includes a U-shaped sliding panel and a C-shaped sliding panel, and according to a second embodiment, a second pair of sliding panels includes a C-shaped sliding panel and a Pi-shaped sliding panel. The second pair of sliding panels operates in a substantially similar manner as the first pair of sliding panels.