21.
    发明专利
    未知

    公开(公告)号:DE1747832U

    公开(公告)日:1957-07-04

    申请号:DEW0017194

    申请日:1957-03-27

    Applicant: WEBER WILHELM

    Inventor: WEBER WILHELM

    22.
    发明专利
    未知

    公开(公告)号:DE1736495U

    公开(公告)日:1956-12-20

    申请号:DEW0015933

    申请日:1956-08-30

    Applicant: WEBER WILHELM

    Inventor: WEBER WILHELM

    24.
    发明专利
    未知

    公开(公告)号:DE1701734U

    公开(公告)日:1955-06-30

    申请号:DEW0012789

    申请日:1955-03-30

    Applicant: WEBER WILHELM

    Inventor: WEBER WILHELM

    A Tool for Enlarging Bore-holes.
    30.
    发明专利

    公开(公告)号:GB105281A

    公开(公告)日:1917-04-12

    申请号:GB800616

    申请日:1916-06-06

    Applicant: WEBER WILHELM

    Inventor: WEBER WILHELM

    Abstract: 105,281. Weber, W. June 6, 1916. Percussive drills.- A tool for enlarging bore - holes comprises two serrated blades b pivoted directly to the tool bodv a and to a spherical member b', and each made in two parts pivoted together. Air passes through a gland d and duct e to remove cuttings.

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