This invention consists of a device which is attached to the pavement ripper of a back-hoe machine in order to convert the ripper into a combined ripper and trench digger so that the ripping of the pavement and the subsequent digging of the trench is accomplished in a single operation. The device consists of a heavy steel plate which terminates into a sharp digging edge at one end thereof. This plate is bent to conform with the ripper edge of a standard back-hoe ripper, upon which it rests, and is held in position at one end by fitting into an undercut part of the ripper and by two spaced side walls attached to the underside of the upper plate. At this end it is also pinned or bolted to the ripper. At the digging end, this plate is provided with a wedge-shaped pocket in which is located the horn end of the ripper to provide additional attachment of the device to the ripper. The width of the upper plate determines the width of the trench to be cut. A lower and shorter steel plate is located directly under the said upper plate to provide reinforcement.
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