Patent ID: 11098743

Abstract:
Screws are provided which have a longitudinal axis and include a threaded shank and a head wherein a socket is formed to be engaged by a wrench and having a pluri-lobed outer profile comprising a series of lobes circumferentially offset and separated by a series of circumferentially offset protrusions of the head. Each protrusion is delimited by two flanks and a front length joining the radially inner ends of the flanks and is convex and symmetrical with respect to a center axis radially oriented with respect to the longitudinal axis. The front length is formed by a center face and two inclined side faces each of which joins the radially inner end of the respective flank with a respective end of the center face, which is oriented orthogonally with respect to the center axis of the protrusion. Pluri-lobed wrenches adapted for use with such screws are also provided.