Portable device for driving in dowels

Claim 2

A portable device for driving in dowels comprising a pistonlike grip, a barrel adapted to receive a dowel, a striker slidable in said barrel for ejecting said dowel, feed means for the dowels, which means is disposed above said barrel and is provided with a cutaway portion in the bottom thereof through which said dowels can pass into the ready-for-firing position in said barrel, said feed means being displaceable parallel with the axis of the dowels held in it interior in such manner that the lengths of said cutaway portion through which said dowels pass on their way to the barrel can be set to suit different lengths of dowels.

Claim 3

A device according to claim 1, wherein said feed means is a housing which has a longitudinal bore adapted to receive a series of dowels, said dowels having end-faces of which abut against each other, said housing being axially displaceable for selectively setting said length of the cutaway portion and fixable in the selected position to which it is displaced.

Claim 4

A device according to claim 2, wherein the longitudinal axis of said longitudinal bore bisects an aperture in said barrel and corresponds in width approximately to the diameter of said barrel, said axis intersecting the axis of said barrel at an acute angle having its apex facing the direction of firing, said longitudinal bore having a wall in which is provided a cutaway portion corresponding in width to at least the diameter of a dowel and facing said aperture in said barrel, which portion is open at the end-face of said housing facing said apex of the acute angle, the maximum length of dowel associated with a given position to which said housing is moved being smaller than a distance measured from that end of said cutaway portion parallel with said axis of the housing to the point of intersection of said axis with the inner circumference of the barrel-wall opposite said aperture, but being greater than a distance, measured in the same manner, but ending at the surface of the dowel inserted in said barrel near said aperture.

Claim 5

A device according to claim 1, wherein an insertion pin is linked to a trigger, which pin, upon operation of said trigger, depresses a forward portion of a dowel projecting obliquely into said aperture from said longitudinal bore and brings it into a position coaxial with said barrel.

Claim 6

A device according to claiM 1, wherein a scale is provided on the outside of the housing, and a mark is provided on a guide arm which displaceably supports said housing and is fitted to the grip of the device, which mark indicates the positions of said housing corresponding to the various maximum lengths of dowel.