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A typical single-car garage roller door has a preloaded spring inside the rolling mechanism. The spring reduces the effort required to open the door. Oversized roller doors in commercial premises are not sprung (except in the US), and a manual pulley and chain system or a geared motor is used to raise and lower (roll up and roll down) the door.
A roller shutter, security shutter, coiling door, roller door or sectional overhead door is a specialized type of door or window shutter consisting of multiple horizontal slats, bars, or web systems interconnected through hinges. The mechanism involves lifting the door to open it and lowering it to close.
Roll up doors are sometimes used in place of swing doors on trailers that make shorter haul deliveries. Diagram of a refrigerator door from 1912 Swing doors are most commonly used on tractor-trailers (dry vans and refrigerated "reefer" vans), intermodal cargo shipping containers , certain rail cars that carry automobiles, and smaller utility ...
High Speed Doors are an evolution of the traditional roller shutter door (hence the alternative name they are often given of Rapid Roll Doors). They are primarily designed to give higher operating speeds, improved sealing and sustain a higher number of opening & closing cycles than traditional roller shutters, without compromising reliability ...
A suicide door on a Delahaye Type 135 Lincoln Continental with rear suicide doors, left-side doors open. A suicide door is an automobile door hinged at its rear rather than the front. [1] Such doors were originally used on horse-drawn carriages [2] but are rarely found on modern vehicles, primarily because they are less safe than front-hinged ...
In May 1954, the Alliance Manufacturing Company first produced its own garage door opener and called it Genie. [2] In 1983 the company entered the home and shop vacuum market, and in 1985 it changed its name to Genie Home Products. [2] Overhead Door Corporation purchased the company in 1994. [2] The Genie Company is headquartered in Mt. Hope ...
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