Pressure relief cushion
    1.
    发明授权
    Pressure relief cushion 失效
    压力缓解垫

    公开(公告)号:US3606886A

    公开(公告)日:1971-09-21

    申请号:US3606886D

    申请日:1969-12-29

    申请人: SCHOLL MFG CO INC

    发明人: BITTNER ERNST

    IPC分类号: B29C44/00 A61F5/30

    CPC分类号: B29C67/20

    摘要: PRESSURE RELIEF CUSHION, SUCH AS A CORN RING, COMPRISING A BODY OF A FLEXIBLE FOAM MATERIAL HAVING A CENTRAL APERTURE THEREIN, THE WALL OF THE BODY WHICH DEFINES THE APERTURE HAVING A GROOVE EXTENDING RADIALLY OUTWARDLY FROM THE WALL TOWARD THE PERIPHERY OF THE BODY.