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1. (WO2018065877) SCREW WITH SOCKET HEAD

Pub. No.:    WO/2018/065877    International Application No.:    PCT/IB2017/056061
Publication Date: Fri Apr 13 01:59:59 CEST 2018 International Filing Date: Tue Oct 03 01:59:59 CEST 2017
IPC: F16B 23/00
Applicants: FONTANA FASTENERS R.D. S.R.L.
Inventors: PEREGO, Francesco
Title: SCREW WITH SOCKET HEAD
Abstract:
The screw (10) has a longitudinal axis (12) and comprises a threaded shank (13) and a head (14) wherein a socket (16) is formed to be engaged by a wrench and having a pluri-lobed outer profile comprising a series of lobes (18) circumferentially offset and separated by a series of circumferentially offset protrusions (20) of the head (14). Each protrusion is delimited by two flanks (22) and a front length (24) joining the radially inner ends of the flanks (22) and is convex and symmetrical with respect to a center axis (26) radially oriented with respect to the longitudinal axis (12). The front length (24) is formed by a center face (28) and two inclined side faces (30) each of which joins the radially inner end of the respective flank (22) with a respective end of the center face (28), which is oriented orthogonally with respect to the center axis (26) of the protrusion (20).