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A gas lift chair is a form of office chair that allows the user to modify their height in relation to the height of a desk, leading to an increase in comfort and ergonomic benefit. A patent describing a common configuration of a gas lift cylinder by John Wang, published 20 May 1989. [1]
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 gas spring consists of a sealed cylinder filled with a charge of high-pressure [5] gas, a piston rod attached to a piston with a sliding seal, and some oil. [1] The piston (or the cylinder wall) contains a number of channels that allow the gas to transfer between the lower chamber (between the piston and the closed end of the cylinder) and the upper chamber (between the piston and the head ...
A hydraulic cylinder is the actuator or "motor" side of this system. The "generator" side of the hydraulic system is the hydraulic pump which delivers a fixed or regulated flow of oil to the hydraulic cylinder, to move the piston. There are three types of pump widely used: hydraulic hand pump, hydraulic air pump, and hydraulic electric pump.
Hydrolock (a shorthand notation for hydrostatic lock or hydraulic lock) is an abnormal condition of any device which is designed to compress a gas by mechanically restraining it caused by a liquid entering the device.
Their range includes products for mobile and industrial hydraulics, elevator hydraulics, hydraulic drives for high-voltage switches and height-adjustable workbenches. Some of the many components produced include hydraulic pumps, hydraulic motors, valves, cylinders, power units, electronic devices and associated systems. [1]
The main problem was that they were big, heavy, and only single-cylinder. For example, a typical 50 hp engine weighed 3 tons. After World War I, Mr. Cook wanted to retire. Bill Denison took over just as the engine market was dying. He continued to operate under the original Cook Motor Co. name. In 1925, Mr. Denison invented a hydraulic car pusher.
Telescopic cylinders must only be used in machinery as a device for providing force and travel. Side forces and moment loads must be minimized. Telescopic cylinders should not be used to stabilize a structural component. [4] Hydraulic telescopic cylinders are often limited to a maximum hydraulic pressure of 2000-3000 psi.