Tool for driving fastening elements into a receiving material

Tool for driving fastening elements into a receiving material comprising an axially elongated housing (1) having a first axis and an axially elongated driving device (2) having a second axis positioned within said housing for directing blows to a fastening element with said first and second axes disposed in parallel relation, said housing (1) having a leading driving end from which fastening elements are driven and a throughbore (3) extending in the direction of said first axis with an opening at said driving end, an axially extending radially expandable sleeve-like section (4) coaxial with and at a leading end of said throughbore and having a first end adjacent said leading driving end and a second end spaced inwardly from said leading driving end and tapering toward said first end of said section (4), said section being slotted in the axial direction, a source of fastening elements mounted on said housing, a channel (5) located within said housing inwardly of said second end of said section (4) and extending substantially perpendicularly to and opening into said throughbore (3), a slide (6) for receiving fastening elements from said source located within said channel (5) and displaceable therein, upon actuation of said tool, perpendicularly of said throughbore (3) toward and away from said throughbore for feeding fastening elements (40) into said throughbore, said driving device (2) comprising a ram (7) axially displaceable through said throughbore (3), means acting on said ram (7) for applying multiple blows thereto, said housing having a guide (8) extending in the direction of said first axis of said housing and through which said driving device (2) is axially displaceable, so that a leading end of said driving device projects axially outwardly from said first end of said sleeve-like section (4) and from said leading driving end of said housing and radially expands said sleeve-like section and said ram (7) arranged to direct multiple blows to an expansion member (37) within said fastening element.