Patent ID: 8939693
Filing Date: 2015-01-27
Classification: F16B

Abstract:
1. A wood screw and truncated cone-shaped washer attached to the wood screw in combination with a wood retainer, the combination being attachable to a wood surface for supporting said wood surface and comprising: a wood screw main body defining a screw section; the truncated cone-shaped washer being rotatable in relation to a head of the wood screw main body such that a top surface of the head and a top surface of the truncated cone-shaped washer are substantially on the same plane, and attached so as not to detach from the head and screw section; and wherein the truncated cone-shaped washer comprises a plurality of rotation-preventing projections, each one projection of said plurality of rotation-preventing projections projecting outward from a first portion of a circumferential outer surface of the truncated cone-shaped washer that is away from a lower edge of the truncated cone-shaped washer so that a second portion of the circumferential outer surface not part of said one projection occurs axially between the first portion of the circumferential outer surface of the truncated cone-shaped washer and said lower edge of the truncated cone-shaped washer; and wherein said each one projection extends only within a region between the top surface of the truncated cone-shaped washer and the lower edge of the truncated cone-shaped washer from said plane, and being configured for rotationally fixing the truncated cone-shaped washer against a surface of the wood retainer into which the wood screw is to enter.