SPRING DEVICE Russian patent published in 2010 - IPC F16F3/04 

FIELD: machine building.

SUBSTANCE: invention is related to the field of machine building. Spring device comprises stem, which is fixed against longitudinal motion in bearing structure, locking device, movable tip, support element, compression spring. Locking device is installed at free end of stem. Movable tip and support element are arranged in the form of bushes. Movable sleeves that are turned to each other by their bottoms are inserted between bushes. Movable race is inserted between sleeves. Springs are arranged in the form of two groups, every of which consists of two springs with various diametre. One end of springs with smaller diametre is placed onto bushes, and another one is inserted into sleeves. One end of springs with larger diametre is placed onto sleeves, and another one is inserted into race. As springs are compressed, it becomes possible for sleeves to enter the race, and bushes may enter according sleeves.

EFFECT: development of spring device with compact dimensions, having optimal ratio of working stroke and load.

2 cl, 2 dwg