Patent ID: 8402734
Filing Date: 2013-03-26
Classification: B63C,F16G,G01S,G10K

Abstract:
1. A chain comprising: a plurality of links arranged as a series of links defining the chain; and a plurality of pins, each pin comprising a first end and second end defining a pin length and with each pin extending between adjacent links of said plurality of links in said chain and configured to secure together said adjacent links; wherein each link comprises a body defining an open interior and containing a pair of surfaces; wherein the surfaces of said adjacent links are in contact and said pins extend through the surfaces of said adjacent links that are in contact and through the body of each link such a first end of each pin is in an interior of a first of said adjacent links and a second end of each pin is in an interior of a second of said adjacent links; wherein each pin comprises a first spherical head on the first end and a second spherical end on the second end; wherein each link comprises concave areas disposed in the interior of that link on the body opposite each one of the surfaces of that link and said spherical heads of pins disposed in the interior of each link engage the concave areas.