Self centering nock
View Patent ↗A self-centering nock is provided for use in a well-balanced nock-arrow or nock-bolt assembly. The self-centering nock includes compliant projecting protrusions or compliant arms that are substantially rotationally symmetric about a cross section normal to a main axis of the self-centering nock. The compliant projecting protrusions or compliant arms may be received in bolts that have bores of differing internal dimensions.
1. A self-centering nock for partial insertion into the bore of an arrow or a bolt, the self-centering nock comprising:
an intermediate portion, wherein the intermediate portion includes a plurality of compliant projecting protrusions; and
a distal end contiguous with the intermediate portion, the distal end including an opening configured to receive the string of at least one of a bow and crossbow;
wherein the plurality of compliant projecting protrusions are substantially rotationally symmetric along at least one cross-sectional plane normal to a main axis of the self-centering nock;
wherein there are at least three compliant projecting protrusions;
wherein the plurality of compliant projecting protrusions comprise arms; and
wherein the arms are in a spiral configuration.
2. The self-centering nock of claim 1 , wherein the arms are made of an elastic or viscoelastic material.
3. The self-centering nock of claim 2 , wherein the self-centering nock is a lighted nock.