Patent ID: 6341927
Filing Date: 2002-01-29
Classification: F16B,Y10S

Abstract:
A tamper resistant fastener system comprising:a head having a smooth, rounded top surface and a longitudinal axis; at least two cutouts extending into said top surface, and, a key having a head engaging portion and at least two depending mating members each having a periphery and a radius; wherein, each of said cutouts includes a sidewall parallel to said longitudinal axis and a floor normal to said longitudinal axis, said floor being bounded along a first side by said sidewall and being unbounded along a second side; and, said sidewall including a first portion extending in a generally radial direction from said axis and a second portion running in a generally circumferential direction, said second portion including a recess having a radius equal to the radius of said at least two depending members and a shape complimentary to a portion of the periphery of said at least two depending mating members.