SHEET OF SPRING Russian patent published in 1994 - IPC

FIELD: mechanical engineering. SUBSTANCE: central part of sheet has constant size in section. Adjoining parts of sheet have variable size in section. End parts of sheet have constant size in section. Cross section of sheet is shaped as rectangle, which has constant section along its length, and isosceles trapeze adjoining to rectangle by its larger base. Height of trapeze decreases from central part of sheet to its ends. In addition either width of smaller base of trapeze increases from central part to ends of sheet or width of larger base of trapeze increases from central part to ends of sheet. EFFECT: increased functional capabilities. 5 dwg