Extendable wrench
    4.
    发明授权

    公开(公告)号:US11890742B2

    公开(公告)日:2024-02-06

    申请号:US17395068

    申请日:2021-08-05

    CPC classification number: B25G1/043 B25B13/5058 B25B13/481

    Abstract: A pipe wrench is provided with an extendable handle that fits within a cavity of the head. A lever locks the extended length of the extendable handle along a continuous spectrum between a maximum and a minimum extension of the handle. The lever includes cam surfaces. In an unlocked position, the thickness of the lever between the pivot and a friction plate is less than the thickness between the pivot and the friction plate in the locked position. The friction plate is a composite comprising a top lever plate, a midsection, and a concave surface. The lever plate and concave surface include hard, durable materials, and the midsection is a soft elastic material that redistributes frictional forces across the frictional block. The channel-lock prevents inadvertent overextension and/or accidental removal of the extendable handle.

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