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    • 10. 发明授权
    • Mason's speed square
    • 梅森的速度广场
    • US09157247B2
    • 2015-10-13
    • US13776202
    • 2013-02-25
    • Peter Korevaar
    • Peter Korevaar
    • E04G21/22E04G21/16B25H7/02B43L7/027
    • E04G21/22B25H7/02B43L7/027E04G21/16
    • An apparatus for use with a masonry block. The apparatus includes a body part that is at least substantially planar, has a perimeter, has a front surface and an opposed rear surface. The apparatus also includes a ¼ block stop part extending from the front surface and a ½ block stop part extending from the rear surface, the body part being dimensioned and the stop parts being positioned and dimensioned such that, when the body part is operatively positioned in a first configuration with the ¼ block stop part abutting the block, the perimeter of the body part can be used to mark the block for a ¼ block cut and when the body part is operatively positioned in a second configuration with the ½ block stop part abutting the block, the perimeter of the body part can be used to mark the block for a ½ block cut.
    • 用于砖石块的装置。 该装置包括至少基本上平面的主体部分,具有周边,具有前表面和相对的后表面。 该装置还包括从前表面延伸的¼块止动部分和从后表面延伸的½块止动部分,主体部分的尺寸确定并且止动部件的定位和尺寸使得当主体部分可操作地定位在 具有¼块止动部分邻接块的第一构造,主体部分的周边可用于标记块,用于1/4块切割,并且当主体部分可操作地定位在第二构造中时,½块止动部分邻接 该块,身体部位的周长可用于标记块的1/2块切割。