Patent ID: 8387491
Filing Date: 2013-03-05
Classification: B25B,F16B,Y10T

Abstract:
1. A fastener system comprising: a fastener having a head and a shank wherein the head is constructed having driver engageable surfaces and said driver engageable surfaces define multiple wings radially extending from a central core; a driver having an end constructed with mating surfaces for engagement with the driver engageable surfaces of the fastener head and said mating surfaces define multiple projections radially extending from a central core matching the wings; wherein each of said projections are constructed with a cross sectional shape comprising an installation surface, a tip portion and a removal surface that define the projection, wherein the central core of the driver has a first radius and the tip portion has a second radius and wherein the ratio of the first radius to the second radius is greater than 0.55, and wherein the driver engageable surfaces of the fastener head are constructed to receive the mating surfaces of the driver.