Disclosed is a locking device, comprising an outer sleeve (1) and at least one locking unit (2) located in the outer sleeve (1), wherein the locking unit (2) is formed by connecting a plurality of pressing blocks (3), a gap (5) is provided between two adjacent ones of pressing blocks (3), a rod locking hole (6) is provided in the gap (5), and a set screw hole (7) is provided on the outer sleeve (1) at a position corresponding to the locking unit (2); and when a set screw is screwed into the set screw hole (7) to directly or indirectly press the locking unit (2), the locking unit (2) deforms and drives the pressing blocks (3) to tightly press rods (8, 9) mounted in the respective rod locking holes (6) at the same time.

An apparatus and related kit for forming the apparatus that includes a modular perimeter guardrail assembly useful on top of electrical transformers found in industrial settings. The apparatus and kit includes a plurality of anchors, each said anchor providing a post support and removably attachable to an edge of an electrical transformer; a plurality of post assemblies, each post assembly removably attached to a corresponding one of said anchors in a vertical orientation; a plurality of brace assemblies, each brace assembly removably attached to at least two of said post assemblies; and at least one midrail clamp assembly capable of providing removable attachment to exactly two of said brace assemblies at a midpoint thereof.

An apparatus and related kit for forming the apparatus that includes a modular perimeter guardrail assembly useful on top of electrical transformers found in industrial settings. The apparatus and kit combines anchors, posts, braces, and midrail clamps that are able to be assembled by a worker quickly, safely and intuitively. The apparatus may be assembled, disassembled, and reassembled any given configuration of the guardrail apparatus on the same or different transformer and serves to prevent workers from falling off the top of the given transformer.

Disclosed is a locking device, comprising an outer sleeve (1) and at least one locking unit (2) located in the outer sleeve (1), wherein the locking unit (2) is formed by connecting a plurality of pressing blocks (3), a gap (5) is provided between two adjacent ones of pressing blocks (3), a rod locking hole (6) is provided in the gap (5), and a set screw hole (7) is provided on the outer sleeve (1) at a position corresponding to the locking unit (2); and when a set screw is screwed into the set screw hole (7) to directly or indirectly press the locking unit (2), the locking unit (2) deforms and drives the pressing blocks (3) to tightly press rods (8, 9) mounted in the respective rod locking holes (6) at the same time.

A bundle spacing device having a first pair of opposing surfaces spaced apart from each other a first distance and a second pair of opposing surfaces spaced apart from each other a second distance, different than the first distance, and generally perpendicular to the first pair of opposing surfaces. The bundle spacing device is configured such that bundles can be coupled to the bundle spacing device in a first position or a second position. The bundle spacing device can also have a first passage extending along a first axis, a second passage extending along a second axis that is perpendicular to the first axis, and a third passage extending along a third axis that is perpendicular to the first axis and parallel to the second axis.

A coupling element (10) for the connection between a first grilled wall (P) and a second grilled wall (P) adjacent and orthogonal to each other of a pet cage, comprising an elongated body (11) one side of which ends with an arched coupling appendage (12), and the opposite side with a head (13) comprising two further arched coupling appendages (15, 16) facing opposite sides of the body (11). Said arched appendages (12, 15, 16) define a first seat (14) and a second seat (18) for the coupling to two rods f1, T) forming part of the first grilled wall (P) and a third seat (18) for coupling to a third rod (T) forming part of the second grilled wall (P) to which the first wall (P) is connected. The third seat (18) is associated with an elastic tongue (19) adapted to contrastingly retain said third rod (T) of said second wall (P) to which the first wall (P) is connected.