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A coil spring is a mechanical device that is typically used to store energy and subsequently release it, to absorb shock, or to maintain a force between contacting surfaces. They are made of an elastic material formed into the shape of a helix that returns to its natural length when unloaded. Under tension or compression, the material (wire) of ...
H&R was the first manufacturer to submit a lowering spring to the Technischer Überwachungsverein certification body, and helped pioneer the aftermarket spring industry in Europe. The early effort by the company led to gaining a TÜV certification for its products, which it continues to meet.
NHK Spring Company. NHK Spring Co., Ltd. (日本発条株式会社, Nippon Hatsujō Kabushiki-gaisha), commonly called as NHK Nippatsu (NHKニッパツ), is regarded as one of the world's leading spring manufacturers. [4] NHK also makes seats for automobiles, suspension systems for disk read-and-write heads used in hard-disk drives, industrial ...
A spring (made by winding a wire around a cylinder) is of two types: Tension or extension springs are designed to become longer under load. Their turns (loops) are normally touching in the unloaded position, and they have a hook, eye or some other means of attachment at each end. Compression springs are designed to become shorter when loaded ...
Marshall coils were invented in 1899 by Canadian-born James Marshall, a machinist and engineer who was born near Haldimand, Ontario, Canada. He received a Canadian patent [1] in 1900, and United States [2] and United Kingdom [3][4] patents in 1902. Marshall established the original Marshall Mattress company in Toronto, Canada, which continued ...
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