Lockable assembly and rake-cultivator implement for using

Claim 1

A rake-cultivator implement comprising an elongated handle having a transverse guide bar secured at one end of the handle, a plurality of wire-like rake tines extending through associated guide openings distributed along said guide bar, a carrier assembly moveable along the handle for adjusting the position of one end of each of the rake tines with respect to said guide bar, said carrier assembly comprising tine end receiving means for holding said one end of said rake tines loosely, though securely, a strap element secured to said carrier assembly and defininG therewith an opening through which said handle passes, said opening being characterized by at least one corner formed by two flat, substantially perpendicular, surfaces, said handle presenting a rounded outer surface facing said corner, and a cam element moveable in the space between said corner and said rounded surface, said cam element having a flat camming portion which, in a first position of said camming element, lies against one of said flat, substantially perpendicular, surfaces with one edge of said cam element lodged in said corner and the opposite edge of said cam element wedged between said one surface and said handle, whereby said handle is forced into tight locking engagement with said strap element and carrier assembly and which, in a second position of said camming element, lies loosely in said opening with said opposite edge nearer said corner, whereby said handle is free for longitudinal movement in said opening with respect to said carrier assembly.