A rod piece connection device, comprising: a first connection piece and a second connection piece. The first connection piece includes a first rod piece connection end and a first joggle joint end opposite to the first rod piece connection end. Wherein, the first joggle joint end includes a protrusion head tongue portion and a neck portion. The second connection piece includes a second rod piece connection end and a second joggle joint end opposite to the second rod piece connection end. The second joggle joint end is located corresponding to the first joggle joint end for them to form into a joggle joint. The second joggle joint end includes a protrusion bottom groove portion and a pillow portion. Wherein the protrusion head tongue portion is disposed corresponding into the protrusion bottom groove portion, and the neck portion is located corresponding to the pillow portion.

An anti-rotation device for a pair of threaded components includes a pair of ratchet interfaces and a spring element. A first ratchet interface and the spring element are movably disposed within a first threaded component, and a second ratchet interface is disposed at a mating end of a second threaded component. During relative rotation of the pair of threaded components, the ratchet interfaces engage, providing a resistance to the threaded components loosening that is greater than a resistance that the ratchet interfaces provide to the threaded components tightening. The anti-rotation device engages automatically upon relative rotation of the threaded components, and not as a separate step occurring after rotation. Additionally, the anti-rotation device may be especially useful in systems where various types of movement can cause the threaded components to loosen, and where visual access to the anti-rotation device is impeded.

An irrigation system having a pipeline supported by one or more towers includes an improved truss connection system having a means for readily adjusting a crown height of the pipeline. A pair of cooperating members define a joint which selectively couples headed ends of adjacent truss rods together to form a truss rail of a truss system that supports the pipeline. A single fastener may fasten the cooperating members, a strut, and a cross-member together at the joint. A length of the truss rail may be decreased by holding the truss rods closer together. In an aspect, the headed ends of the adjacent truss rods are held closer together by inserting a shim in one of the joints. Decreasing the length of the truss rail increases the deflection of the pipeline and raises the crown height.

Solar trackers that may be advantageously employed on sloped and/or variable terrain to rotate solar panels to track motion of the sun across the sky include bearing assemblies and other mechanical features configured to address mechanical challenges posed by the sloped and/or variable terrain that might otherwise prevent or complicate use of solar trackers on such terrain.

An above ground frame pool (10) includes a frame assembly (20) and a liner (40) supported by the frame assembly (20). The frame assembly (20) includes a plurality of horizontal pipes (22), a plurality of vertical pipes (24), and a plurality of T-shaped joints (30). The joints (30) may lack mechanical fasteners with adjacent pipes or corresponding apertures. The joints (30) may be one-piece or multi-piece structures. Such joints (30) may be water-resistant and convenient to manufacture, assemble, disassemble, and store.

A connecting ring for coupling small animal habitat parts. The connecting ring can include a hoop, upper tabs projecting from an upper surface of the hoop, and lower tabs projecting from a lower surface of the hoop. The lower surface of the hoop is opposing the upper surface. Each of the upper tabs can include: a respective inner bump extending radially inward toward an interior of the hoop, and a respective inner groove formed between a respective lower surface of the respective inner bump and the upper surface of the hoop. Each of the lower tabs can include a respective outer bump extending radially outward away from the interior of the hoop, and a respective outer groove formed between a respective upper surface of the respective outer bump and the lower surface of the hoop. Other embodiments are disclosed.

An adjustable length strut for use in an external fixation system may include an outer tube, an inner tube within the outer tube, and a first adjustment knob. A plurality of texturized surfaces may extend in the length direction of the inner tube, each of the plurality of texturized surfaces of the inner tube being spaced apart from each other in the circumferential direction of the inner tube. Each circumferentially adjacent pair of texturized surfaces of the inner tube is separated by a non-texturized surface. The first adjustment knob may also include texturized surfaces separated by non-texturized surfaces, and may be rotatable relative to the outer tube and the inner tube between a locked condition and an unlocked condition. In the locked condition, the texturized surfaces engage each other, to prevent translation of the inner tube relative to the outer tube.

Solar trackers that may be advantageously employed on sloped and/or variable terrain to rotate solar panels to track motion of the sun across the sky include bearing assemblies and other mechanical features configured to address mechanical challenges posed by the sloped and/or variable terrain that might otherwise prevent or complicate use of solar trackers on such terrain.

A system for stiffening a structure has at least one pair of tie rods (3), each tie rod (3) of the pair of tie rods (3) having a first end (4) fastened to the structure (2) and a second end (5), and at least one device (6) for tensioning the tie rods (3) having a deformable linking element (7) fastened to the second end (5) of each tie rod (3) so as to connect the tie rods (3). An actuator (10) is configured to deform the linking element (7) so as to make it pass from an inactive configuration in which the tie rods (3) are in a first state of tension to an active configuration in which the tie rods (3) are in a second state of tension, different than the first state of tension.

A method of assembling a steering column assembly includes pressing a first pivot bushing into a first rake bracket first opening of a first rake bracket and inserting a first pivot fastener into the first pivot bushing and into a first mounting bracket opening of a first mounting bracket arm of a mounting bracket. The method further includes displacing material of the first mounting bracket arm with first splines of the first pivot fastener to form first mating splines within the first mounting bracket opening.