GB155130A - Improvements in pipe-wrenches - Google Patents

Abstract

155,130. Cook, J. W. D. Jan. 19, 1920. Hand-grip wrenches.-Relates to pipe wrenches of the type in which one member having a curved jaw is adjustable upon the other member on which it pivots in the act of gripping the pipe or other object, a pivot pin on the former member being adapted to engage in one of a series of partcircular notches upon the back edge of the shank of the latter member to allow of adjustment of the open jaws to the size of the pipe &c. before gripping it, and consists in providing the curved jaw member with a guide having two angularlydisposed faces such that the other jaw member is maintained with one of its notches engaged with the pivot pin when its front edge contacts with one angular face, and is released from the pivot when rocked to engage with the other angular face. In the form shown in Fig. 2, the angularly-formed faces f<1>, f<2> are formed on the distance piece f secured between the jaw portions of the U-shaped jaw member d. By turning the other jaw member c so that its shank c contacts with the face f<2>, the notched rear edge, c<1> is disengaged from the pivot h, thus allowing free adjustment. The shank c may be widened out at c<2> to prevent disconnexion of the two members. In the form shown in Fig. 4, the guide consists of a plurality of pins f<3>, arranged to afford two angularly-disposed contact positions f<1>, f'.