Anti-backbend chains for medical applications such as adjustable operation chairs and hospital beds are now available from iwis.

Flexible in only one direction, anti-backbend chains can transmit tensile and compressive forces over longer distances without the need for a guidance system. They perform a similar function to linear drives, eliminating the need for an endless, circulating chain drive. According to the company, the side and backbend capability is individually adjustable within certain limits.

The chains can be made in a range of sizes and configured for various drive concepts, or with larger strokes and axle spacing. They are available in various materials with a range of surface finishes and lubricant.

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