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2. Torsion spring - Wikipedia

   en.wikipedia.org/wiki/Torsion_spring

   Torsion bars and torsion fibers do work by torsion. However, the terminology can be confusing because in helical torsion spring (including clock spring), the forces acting on the wire are actually bending stresses, not torsional (shear) stresses. A helical torsion spring actually works by torsion when it is bent (not twisted).

3. Garage door - Wikipedia

   en.wikipedia.org/wiki/Garage_door

   The weight of the door may be 400 lb (180 kg) or more but is balanced by either a torsion spring system or a pair of extension springs. [2] A garage door opener is controlled motorized mechanism for opening garage doors adds convenience, safety, and security often used with a remote or a button on wall.

4. Roller shutter - Wikipedia

   en.wikipedia.org/wiki/Roller_shutter

   Shutter spring [3] Spring wire. Made from the spring wire, it also called torsion spring. Flat spring. Formed by hardened and tempered steel strips in coils. Common steel grades C67, CK67, SAE1070, etc. Guide rail (or track) [3] Steel or aluminium to retain the shutter curtain within the opening.

5. Twist-beam rear suspension - Wikipedia

   en.wikipedia.org/wiki/Twist-beam_rear_suspension

   The twist-beam rear suspension (also torsion-beam axle, deformable torsion beam, or compound crank) is a type of automobile suspension based on a large H- or C-shaped member. The front of the H attaches to the body via rubber bushings , and the rear of the H carries each stub-axle assembly, on each side of the car.

6. Balance spring - Wikipedia

   en.wikipedia.org/wiki/Balance_spring

   The balance spring is a fine spiral or helical torsion spring used in mechanical watches, alarm clocks, kitchen timers, marine chronometers, and other timekeeping mechanisms to control the rate of oscillation of the balance wheel. The balance spring is an essential adjunct to the balance wheel, causing it to oscillate back and forth.

7. Jaguar independent rear suspension - Wikipedia

   en.wikipedia.org/wiki/Jaguar_independent_rear...

   The side struts sit about horizontally in the live installation. Jaguar's independent rear suspension (IRS) unit has been a common component of a number of Jaguar production cars since 1961, passing through two major changes of configuration up to 2006 and last used in the Jaguar XK8 and Aston Martin DB7 .