Disclosed herein is a solar array structure that includes a first vertical column having a first height and a second vertical column having a second height, the second height being taller than the first height. The solar array support structure further includes a telescopic wind brace extending between an upper portion of the first vertical column and a lower portion of the second vertical column.

A bolt arrangement for connecting at least two mechanical elements. The arrangement providing a bolt including an outer circumferential peripheral surface extending in a longitudinal direction of the bolt, a sleeve presenting an outer circumferential peripheral surface and an inner circumferential peripheral surface extending in a longitudinal direction of the sleeve between a first and a second axial end of the sleeve. The inner peripheral surface provides a tapering profile in its longitudinal direction. A portion of the outer peripheral surface of the bolt provides a corresponding tapering profile matching the tapering profile of the inner peripheral surface of the sleeve. The sleeve further provides a portion extending radially outwards at one of the first and second axial ends. In addition, a coupling arrangement is disclosed.

A bolt arrangement that includes a bolt having an outer circumferential peripheral surface extending in a longitudinal direction of the bolt, and a sleeve providing an outer circumferential peripheral surface and an inner circumferential peripheral surface extending in a longitudinal direction of the sleeve. The inner peripheral surface has a tapering profile in its longitudinal direction. A portion of the outer peripheral surface of the bolt provides a corresponding tapering profile matching the tapering profile of the inner peripheral surface of the sleeve. Furthermore, the inner peripheral surface of the sleeve further includes a groove. A coupling arrangement and a method of dismounting a coupling arrangement is also provided.

An artificial tree comprising a first trunk section and a second trunk section. The second trunk section can be configured to receive a portion of the first trunk section and can include a sleeve disposed proximate an end of the second trunk section. The sleeve can include a lower lip having an angled portion that can interact with a rolling protrusion disposed on the first trunk section. The rolling protrusion can rotate upon interaction with the angled portion of the lower lip to guide and assist the second trunk section to receive a portion of the first trunk section.

Disclosed is an adjustable vertical pipe support, in which a second saw-toothed portion is positioned in a wedge of a length adjusting member for adjusting a length of upper and lower pipes, so as to prevent unlocking or slip of the upper pipe and thus improve the safety of the vertical pipe support, even though a first rotation adjustor is rotated by a tensile force or an external force. The adjustable vertical pipe support includes a wedge with a first and second saw-toothed portion on the inner peripheral surface, in which any one of the first saw-toothed portion and the second saw-toothed portion is inclined upwardly so as to suppress downward movement of the upper pipe, and the other is inclined downwardly or is formed in the shape of a ridge so as to suppress upward movement of the upper pipe.

Disclosed is an adjustable vertical pipe support, in which a second saw-toothed portion is positioned in a wedge of a length adjusting member for adjusting a length of upper and lower pipes, so as to prevent unlocking or slip of the upper pipe and thus improve the safety of the vertical pipe support, even though a first rotation adjustor is rotated by a tensile force or an external force. The adjustable vertical pipe support includes a wedge with a first and second saw-toothed portion on the inner peripheral surface, in which any one of the first saw-toothed portion and the second saw-toothed portion is inclined upwardly so as to suppress downward movement of the upper pipe, and the other is inclined downwardly or is formed in the shape of a ridge so as to suppress upward movement of the upper pipe.

An artificial tree comprising a first trunk section and a second trunk section is disclosed. The second trunk section can be configured to receive a portion of the first trunk section and can include a sleeve disposed proximate an end of the second trunk section. The sleeve can include a lower lip having an angled portion that can interact with a rolling protrusion disposed on the first trunk section. The rolling protrusion can rotate upon interaction with the angled portion of the lower lip to guide and assist the second trunk section to receive a portion of the first trunk section.

Disclosed is a filler piece mounting assembly for a lifting column. The lifting column includes a first casing and a second casing sliding in the first casing. The filler piece mounting assembly includes a resilient filler piece and a fixed frame for fixing the resilient filler piece. The resilient filler piece is disposed outside an outer wall of the second casing and axially fixed relative to the first casing. The fixed frame is disposed at a front end of the first casing and moves relative to the first casing. A first inclined surface is disposed on an outside of the resilient filler piece. The fixed frame includes an extrusion part for extruding the first inclined surface, and the extrusion part extrudes the first inclined surface to radially deform the resilient filler piece to adjust a clearance between the resilient filler piece and the second casing.

An umbrella holding device designed for secure placement in a hole on a patio, porch, or pool deck. The device comprises a grip nut, a base, and a ferrule. The grip nut features a grip exterior and interior, with the interior partially threaded. The base has a grip portion and a patio extension, with the patio extension designed to fit into the patio hole and the grip portion configured to engage with the grip nut thread. The base interior is substantially funnel-shaped. The ferrule, which can be inserted into the grip hollow, has a top and at least one tang. When the threaded exterior portion engages the grip nut thread, the ferrule is pushed into the base interior, and the funnel-shaped base interior exerts inward pressure on the ferrule.

An umbrella holding device for securing an umbrella in a patio hole includes a grip nut with a threaded interior and a shoulder, a base with a threaded grip portion and a patio extension, a removable thread sleeve that slides over the patio extension, and a ferrule. The ferrule is inserted into the grip nut and, when the grip nut engages the base, the ferrule is compressed into the funnel-shaped base interior to grip the umbrella shaft. The removable thread sleeve, made of pliable material, slides over the patio extension and compresses against the patio hole when threaded in, creating a friction hold. Multiple thread sleeves of different dimensions and materials can be provided to accommodate various patio hole sizes and conditions.