公开(公告)号：US4967609A

公开(公告)日：1990-11-06

申请号：US359326

申请日：1989-05-31

申请人： Eitaro Takagi ,  Nobuyuki Ito ,  Masato Umeda

发明人： Eitaro Takagi ,  Nobuyuki Ito ,  Masato Umeda

IPC分类号： F16D3/84 ,  F16J3/04

CPC分类号： F16J3/041 ,  F16D3/845 ,  F16J3/043 ,  Y10T403/31 ,  Y10T403/315

摘要： A flexible boot having a bellows and mount portions on both axial ends of the bellows portion at which the boot is mounted on parts of a mechanism such as an automotive constant velocity joint. The flexible boot has an anti-degradation agent make-up element made of a material which contains an anti-degradation agent and which is capable of allowing the anti-degradation agent to precipitate on the surface thereof. The anti-degradation agent make-up element is fitted on at least a portion of the outer surface of the bellows so that the anti-degradation agent precipitated on the surface of the material of the anti-degradation agent make-up element is caused to progressively immigrate into the material of the bellows thereby making-up the anti-degradation agent in the bellows.