Patent ID: 6237922
Filing Date: 2001-05-29
Classification: F16J

Abstract:
A mechanical duty bellows comprising:a plurality of annular rubber diaphragms (12) of conical shape, and each having a base (13) and truncated apex (14) both normal to an axis of radial symmetry (15);each of said diaphragms having an outer cylindrical wall (16) of predetermined axial width (t1) extending axially from said base toward said apex and defined by a first radius (R1) from said radial axis;each of said diaphragms having an inner cylindrical wall (17) of predetermined axial width (t2), extending axially from said apex toward said base and defined by a second radius (R2) from said radial axis, said inner wall being displaced axially away from said base a predetermined distance to impart said conical shape (d);said plurality of diaphragms being assembled concentrically on a common axis (21) in alternate base-to-base contact and apex-to-apex contact thereby providing outer wall pairs and inner wall pairs;outer cylindrical metal hoops (18) each one having an inner diameter substantially equal to twice said first radius and an axial width substantially equal to twice said outer wall width, one of said outer hoops being bonded about each said outer wall pairs; andinner cylindrical metal hoops (19) each one having an outer diameter substantially equal to twice said second radius and an axial width substantially equal to twice said inner wall width, one of said inner hoops being bonded within each said inner wall pairs.