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An office chair, or desk chair, is a type of chair that is designed for use at a desk in an office. It is usually a swivel chair , with a set of wheels for mobility and adjustable height. Modern office chairs typically use a single, distinctive load bearing leg (often called a gas lift ), which is positioned underneath the chair seat.
A caster is a wheel mounted to a fork, with an optional, additional offset steering joint. An omnidirectional wheel (Mecanum wheel, Omni wheel, or Swedish wheel) is made of a large central hub with many additional smaller wheels mounted along the perimeter such that their axes are perpendicular to the central wheel. The central wheel can rotate ...
Most modern roller coasters typically have pairs of wheels in each orientation, with 6 wheels per assembly, but this can vary by ride. The up-stop system was developed in 1919 by John A. Miller . He patented a design to make Pleasure-Railway attractions safer.
A swivel, swivelling, spinny, or revolving chair is a chair with a single central leg that allows the seat to rotate 360 degrees to the left or right. A concept of a rotating chair with swivel castors was illustrated by the Nuremberg noble Martin Löffelholz von Kolberg in his 1505 technological illuminated manuscript , the so-called Codex ...
The Hot Wheels Bone Shaker: The Ultimate Ride is still fast and high, climbing 84 feet into the air, but it's more family-friendly. Riders get to sit in cars with the cool, hot-rod design and ...
The inverted coaster was developed in the early 1990s by engineers Walter Bolliger and Claude Mabillard of the Swiss roller coaster manufacturer Bolliger & Mabillard in cooperation with engineer Robert Mampe and Jim Wintrode, at the time the general manager of Six Flags Great America, who first envisioned a suspended coaster capable of inversions.
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