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    • 4. 发明授权
    • Muzzle brake and tool for installation
    • 枪口制动器和安装工具
    • US4919035A
    • 1990-04-24
    • US319321
    • 1989-03-06
    • Mark C. PinkstonMargarita Pinkston
    • Mark C. PinkstonMargarita Pinkston
    • B23B5/16B23G5/04F41A21/36
    • F41A21/36B23B5/168B23G5/043B23B2215/28Y10T408/558Y10T408/8923Y10T408/895Y10T408/9042Y10T408/95
    • A muzzle brake and tool for effectively installing the brake on the muzzle end of a rifle without the necessity of engaging the services of a gunsmith. The tool for installation includes a handle assembly, a bore pilot and an insertable threading die and cutter and cutter holder by which the owner of the rifle can effectively trim the end of the barrel and then form threads on the external surface of the barrel onto which the muzzle brake can be screw threaded. The muzzle brake is a hollow cylindrical member having an internally threaded end engaged with the externally threaded end of the muzzle of the rifle together with two flat sides and four vents extending horizontally when installed on the rifle barrel with the vents being equally spaced and equally sized and communicating the hollow interior of the muzzle brake with the atmosphere to release gases thereby reducing recoil felt when the gun is fired.
    • 一个枪口制动器和工具,用于在步枪的枪口端有效地安装制动器,而不需要接触枪支的服务。 用于安装的工具包括手柄组件,钻孔引导件和可插入的螺纹模具和切割器和切割器保持器,步枪的所有者可以通过该夹持器有效地修剪筒的端部,然后在筒的外表面上形成螺纹, 枪口制动器可以是螺纹连接的。 枪口制动器是一个中空的圆柱形构件,其具有内螺纹端部,与步枪枪口的外螺纹端部连接,并且当安装在步枪枪管上时两个平坦的侧面和四个通气口水平延伸,并且排气孔的距离相等 并且将气枪制动器的中空内部与大气连通以释放气体,从而当枪被击发时减少后坐感觉。
    • 8. 发明授权
    • Carbide thread chaser set and method of cutting threads therewith
    • 碳化物螺纹锤组和切割螺纹的方法
    • US3776655A
    • 1973-12-04
    • US3776655D
    • 1971-09-07
    • PIPE MACHINERY CO
    • URBANIC R
    • B23G5/10B23G1/00B23G5/04
    • B23G5/10Y10T408/03Y10T408/9045
    • A set of multitooth thread chasers with their teeth shaped and arranged to perform a succession of central roughing cuts of approximately trapezoidal cross section, respectively, and of successively decrescent areas. The chasers are free from any portions which can cause flanking cuts which result in lateral flanges on the resultant chips. The cut produced by each tooth extends close to, but terminates a few thousandths of an inch short of, the flanks of two adjacent threads so that, in the final rough cut thread, a very thin layer of metal remains between the rough cut thread surface and the thread finish lines, and this layer is continuous and uninterrupted along the entire final rough cut thread surface. This layer is removed by a single finishing tooth which makes a single finish cut concurrently cutting a portion of one crest, along the thread trough and flanks and a portion of the adjacent crest, thus cutting over a length of thread cross section equivalent to one complete thread.
    • 一组具有齿形和布置的多平面线锯,分别执行大致梯形截面的中继粗切割和连续凹陷区域的连续切割。 这些踏板没有任何可能导致侧面切割的部分,导致所得切屑上的横向凸缘。 由每个齿生产的切口延伸到两个相邻螺纹的两侧的几千分之一英寸处,因此在最终的粗切螺纹中,非常薄的金属层保留在粗切割螺纹表面 和丝线,并且该层沿整个最终粗切线表面连续且不间断。