The invention is directed to a construction tube which has a circular cross section, wherein the circular cross section including two circular stretches and two flat stretches diametrically opposite from each other which define two parallel planes interrupting the circular stretches. It enables the advantages of construction tubes with a circular cross section and the advantages of tubes with a polygonal cross section to be combined. The construction tube can be joined to a connectable element, which is preferably selected from another construction tube and an output shaft of a reducer of a solar tracker, in particular, using inner parts and/or clamps. The construction tube of the invention has a special application in solar collection systems, making up a torsion shaft of a solar tracker.

The present invention provides an improved locking mechanism for securely connecting modular or detachable components. The locking mechanism includes a male and female portion associated with, respectively, a first and second modular component, the male portion having a slit defining a first and second finger, the locking mechanism having a spreading means provided by a pressure bolt mechanism including a pressure bolt, wherein the pressure bolt is configured to, when turned by up to substantially 1 revolution, move the first and second fingers from a closed position wherein the first and second fingers are substantially parallel to one another, to a spread position wherein the first and second fingers abut an interior surface of the female portion, thereby connecting the first and second modular component.

In one example, a housing for an antenna assembly is described. The housing may include a lower enclosure configured to be coupled to an upper structure to define an internal region. The housing may also include an internal cover configured to be coupled to the lower enclosure to create a first chamber and a second chamber within the internal region.

A connector having a male component and a female component. The male component has a first tubular section, a second tubular section, and a midsection between the first tubular section and the second tubular section. The female component is connected to the second tubular section of the male component upon relative rotational movement between the male component and the female component and disconnected from the second tubular section of the male component upon relative rotational movement between the male component and the female component in a direction opposite to the direction when the male component and the female component are being connected. The female component has a bearing surface bearing against the midsection of the male component in a first position of the bearing surface and is spaced from the midsection of the male component in other positions of the female component.

A coupling device includes a plurality of frames, each of which includes a base wall, and two spaced-apart side walls that cooperate with the base wall to define an accommodation space. The frames are arranged such that the accommodation spaces of the frames communicate with each other. At least one coupling unit is disposed in the accommodation spaces of two adjacent ones of the frames and applies a force to the side walls of the two adjacent ones of the frames so as to couple together the two adjacent ones of the frames.

A solar panel racking system that can include end clamps, mid clamps, bottom clamps, L-foot adapter assemblies, rails, and L-foot assemblies. The solar panel racking system minimizes the use of tools by snapping many of the mounting components in place. The end clamps, mid clamps, and bottom clamps can snap over the rail sides and lock into upper detented portions of the rail sides. The upper detented portions are structured to prevent upward movement of the end clamps, mid clamps, and bottom clamps. The L-foot adapter body of the L-foot adapter assembly snaps over lower detented portions of rail sides and secures the rail to an L-foot assembly. The end clamps, mid clamps, bottom clamps, rails, and L-foot adapter assemblies are independent of the L-foot assembly, allowing a selection of L-foot assemblies to be used as appropriate with the solar panel racking system.

Mounting clamps may be utilized to quickly and easily secure solar panel modules relative to mounting rails, which may in turn be secured relative to a mounting surface (e.g., a roof). The mounting clamps may be configured to quickly secure the solar pane modules relative to the mounting rails by tightening a tightening element to pull a clamp element toward the surface of a mounting rail, thereby clamping a portion (e.g., a frame) of a solar panel module between the clamping element and an outer surface of the mounting rail.

A connector having a spring configured to change a dimension such as diameter or length in response to a change in a force applied to it, wherein the spring is biased in a radial or longitudinal direction towards a natural dimension. The connector including a dimension control portion configured to restrict the change in dimension in a direction away from the bias of the spring.

A solar panel racking system that can include end clamps, mid clamps, bottom clamps, L-foot adapter assemblies, rails, and L-foot assemblies. The solar panel racking system minimizes the use of tools by snapping many of the mounting components in place. The end clamps, mid clamps, and bottom clamps can snap over the rail sides and lock into upper detented portions of the rail sides. The upper detented portions are structured to prevent upward movement of the end clamps, mid clamps, and bottom clamps. The L-foot adapter body of the L-foot adapter assembly snaps over lower detented portions of rail sides and secures the rail to an L-foot assembly. The end clamps, mid clamps, bottom clamps, rails, and L-foot adapter assemblies are independent of the L-foot assembly, allowing a selection of L-foot assemblies to be used as appropriate with the solar panel racking system.

Some embodiments provide ocean rig releases apparatus, systems and methods. In some implementations, a rig release apparatus comprises: a body having a first and second mating sections each being connected to one of two separate tethers; at least one locking shoe movably secured with the first mating section and movable between a first position configured to secure the first mating section and the second mating section together and a second position configured to allow the first mating section and the second mating section to separate; and a locking system configured to releasably lock the first and second mating sections and prevent hydrostatic pressure created by ocean depths from inadvertently unlocking, wherein the locking system comprises: a restraint system that inhibits the movement of the at least one locking shoe, and comprises a stop element that when released physically retracts to unlock the locking system allowing.