Patent ID: 6941635
Filing Date: 2005-09-13
Classification: F16B,Y10T

Abstract:
1. A method of using a fastener comprising: providing a fastener having a shank, a head, a tapered section, a first threaded section and a second threaded section, said first threaded section being closer to said tapered section and said second threaded section being closer to said head, said first threaded section having a first thread angle and said second threaded section having a second thread angle smaller than said first thread angle, said first threaded section having threads having a first pitch and said second threaded section having threads having a second pitch different from said first pitch; engaging said tapered segment of said fastener with a remnant-producing material; rotating said fastener in the direction of said threads of the first threaded section thereby inserting said fastener into said remnant-producing material and producing remnants from said remnant-producing material; rotating said fastener in the direction of said threads of the first threaded section after said second threaded section becomes engaged with said remnant-producing material thereby causing said second threaded section to capture said produced remnants; and rotating said fastener until said head engages with said remnant-producing material.