Abstract: An oscillating drive apparatus for working tools which enables a large-diameter pipe to be readily and efficiently turned, cut or threaded without the need for a large working area. The apparatus comprises a casing body, a vise for holding a pipe, the vise being provided at the forward end of the casing body, a motor provided inside the casing body, a speed reducing gear train provided inside the casing body, and an oscillating arm for driving a working tool, the oscillating arm being provided on one side of the casing body so as to be oscillated by the final output shaft of the speed reducing gear train through an oscillating drive mechanism. Also disclosed is a working apparatus for pipes wherein a shaft is provided on the distal end portion of the oscillating arm of the oscillating drive apparatus in such a manner as to extend parallel to a pipe held by the vise and a wrench or cutter member is attached to the shaft.

Abstract: A shearing tool for synthetic resin tubes in which a lower jaw is connected to the leading end of an upper handle portion, a lower handle portion is pivoted at the leading end to the rear and lower end of said lower jaw, an upper jaw or shearing blade having a cutting edge is pivoted in an intermediate position to said upper handle portion above the pivot connection of said lower jaw to said lower handle portion, said lower jaw is provided with an arcuate tube receiving recess in the upper surface thereof, an opening is provided in forward portion of said upper handle portion extending therefrom to the leading end of said lower jaw for receiving said upper jaw, a connection link is connected between the rear end portion of said blade interposed between said upper and lower handle portions and the lower handle portion in a position rearwardly of said pivot connection of the lower jaw to said lower handle portion for urging said cutting edge toward said tube receiving recess when said upper and lower handle por