Screw, particularly wood screw

Claim 1

An arrangement comprising: (A) first and second wood elements adjustably positioned relative to each other; and (B) a one-piece screw device interconnecting the first and second wooden elements, said screw device including (i) an elongated screw shank having opposed ends, (a) said shank having a first section extending from one of said ends toward, but terminating short of, the other of said ends, said first section having a screw thread threadedly engaging only the first wooden element, and having a maximum outside diameter, and (b) said shank having a second unthreaded section extending from said other end toward, but terminating short of, said one end, said second section engaging only the second wooden element, (ii) a frusto-conically shaped screw head at said other end and engaging only the second wooden element, said head having a frusto-conically tapering wall facing toward said first section and means for enabling the screw device to be turned about an axis extending lengthwise along the shank, said first section being movable along the axis during turning of the screw device to adjustably position the first and second wooden elements relative to each other, and (iii) means on said second section for preventing movement of said second section along the axis during turning of the screw device, said preventing means having at least one annular projection on said second section between said screw head and said first section, said projection being aranged concentric to the axis and having a maximum outside diameter which is larger than the maximum outside diameter of the screw thread, said projection being frusto-conically shaped and having a single frusto-conical tapering side facing away from said screw head and rotatably engaging only said second element to permit only rotation in said second element during turning of the screw device.