Patent ID: 7752732
Filing Date: 2010-07-13
Classification: F16B,Y10T

Abstract:
1. An anchoring fastener, comprising: an elongated member comprising a distal section and a proximal section, said distal and proximal sections being coaxial in an initial configuration and each having an axis, said proximal section having a hole therethrough and having a side facing said distal section in said initial configuration, said hole having an axis parallel to said axes of said distal and proximal sections, said axis of said hole being offset from said axis of said distal section so that said hole is offset from said distal section, said distal and proximal sections being pivotally joined at a pivot so that said distal section can pivot with respect to said proximal section, said distal section having a sharpened forward end on said axis of said distal section, said distal section having a projection with a surface facing said proximal section in said initial configuration, said surface of said distal section that faces said proximal section in said initial configuration constituting a cam follower portion, said cam follower portion and said hole of said proximal section being offset and positioned so that when an elongated activating member is inserted through said hole, said activating member will meet said cam follower portion at a location farther from said axis of said distal section and from said pivot than if said hole were coaxial with said axis of said distal section, thereby to cause said distal portion to pivot away from said proximal section to an expanded or anchoring configuration, whereby said activating member will meet said cam follower portion with increased off-axis leverage so as to provide increased pivotal force against said distal section and tend to pivot said distal section through an angle greater than 90 degrees.