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1. 发明授权

US3830538A Seal 失效
公开(公告)号：US3830538A
公开(公告)日：1974-08-20
申请号：US25860872
申请日：1972-06-01
申请人： BROOKS E CO
发明人： MOBERG S
IPC分类号： G09F3/03 , G09F3/14 , G09F3/00
CPC分类号： G09F3/037 , G09F3/14 , Y10T24/505 , Y10T292/50
摘要： A seal formed of molded resilient plastic material, including a housing through which a shackle is passed, said housing having internal integral shackle engaging fingers. The shackle is provided with annular shoulders for engagement by the fingers so that the shackle can be drawn through the housing in one direction, but is prevented from retrograde movement. The end portion of the shackle is provided with annular enlarged portions which may be drawn through the housing without excessive pulling force being required, yet provides a surface providing for gripping by the fingers. A portion of the shackle between two adjacent annular shoulders is provided with a weakened portion to insure that when sufficient tension is applied, the shackle will fracture at that position, with said position being predetermined for the application in which the seal is to be used, so that the fracture occurs within the housing.

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