초록 ▼

The basic features of the invention include a pipe parting mole, a length of cable that is engagable to the mole, a cable pulling device and a cable pulling device engagement frame that provides a mounting structure for the cable pulling device. The cable pulling device engagement frame generally in

The basic features of the invention include a pipe parting mole, a length of cable that is engagable to the mole, a cable pulling device and a cable pulling device engagement frame that provides a mounting structure for the cable pulling device. The cable pulling device engagement frame generally includes a reaction plate and an annulus member for removably engaging the cable pulling device with the frame. The frame is configured for the sideways engagement of the cable within the frame and the annulus member. Two pairs of cable engagement collets are preferably utilized; a first pair being disposed within the cable pulling device to engage the cable on a pulling stroke, and a second pair may be disposed within the frame or the cable pulling device to engage the cable on a recovery stroke. The cable pulling device is preferably a post tensioning ram (PTR).

대표청구항 ▼

[ What We claim is:] [1.]1. A device for the trenchless replacement of in-situ pipe, comprising:a mole;a length of cable, said cable being engagable to said mole;a cable pulling device being releasably engagable to said cable;a cable pulling device mounting frame being releasably engagable to said c

[ What We claim is:] [1.]1. A device for the trenchless replacement of in-situ pipe, comprising:a mole;a length of cable, said cable being engagable to said mole;a cable pulling device being releasably engagable to said cable;a cable pulling device mounting frame being releasably engagable to said cable pulling device; andwherein said cable pulling device includes at least one pair of cable engaging collets that function to engage said cable on a said pulling stroke and to release said cable on a said recovery stroke; andwherein at least one further pair of collets is provided that function to engage said cable on said recovery stroke and release said cable on said pulling stroke.