Patent ID: 6293744
Filing Date: 2001-09-25
Classification: F16B

Abstract:
A fastener system comprising:a fastener including a longitudinally extending shank with a head on one end thereof, said head having a first pattern formed thereon;a cap configured and arranged to be seated upon said head, said cap including a second pattern formed on an interior surface thereof and a third pattern on an exterior thereof, said second pattern being adapted to cooperate with said first pattern, whereby rotational forces applied to said cap are transferred to said fastener via contact between said first and second patterns, and said third pattern being of a different general shape than said second pattern and including a plurality of straight segments joined to each other by a plurality of corners; andsaid second pattern being defined by a closed figure including a plurality of outermost circumferential points located along a circle, with adjacent points being separated by a pattern distance that is greater than the length of an imaginary straight line drawn directly between said adjacent points;wherein said second pattern is defined by a plurality of radially extending branches, and further wherein only a single one of said radially extending branches extends towards each of said straight segments of said third pattern.