SCREW HEAD
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United States of America Patent
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N/A
Issued Date -
Jun 28, 2012
app pub date -
Nov 25, 2011
filing date -
Dec 23, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Fastening system including a screw component (10) and a seating component (20). The screw component having a shaft (12) of maximum radius R1, a threaded section (13), and a head (14) having a bottom end (15) having a larger maximum radius R2 than the screw shaft such that an exposed underside (18) of the screw head extends radially beyond the maximum radius of the screw shaft. The system further includes a seating component with a screw channel (21) and a planar screw seat (22) having a minimum radius R3 which is equal to or greater than R1. The bottom end of the screw head has an annular contact surface for abutment against the screw seat, the contact surface being formed by the distal end of at least one downwardly extending protrusion (17) on the underside of the screw head, wherein the annular contact surface has a minimum radius greater than the minimum radius of the screw seat.
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