Patent ID: 7971385
Filing Date: 2011-07-05
Classification: A01K,B63B

Abstract:
1. An under ice crawler lowerable through a hole in a layer of ice into a body of water therebeneath and operable to extend a flexible line within the body of water between two points spaced apart along the layer of ice, the crawler comprising: a floating body having sliding surfaces defined at an upper limit thereof to allow sliding of the floating body along the layer of ice against an undersurface thereof; an electrical power supply carried on the floating body; a motor carried on the floating body to selectively drive a propeller when powered by the electrical power supply via a control circuit between the motor and the electrical power supply, selective operation of the motor driving the floating body in a forward direction within the body of water below and along the layer of ice; a connector carried on the floating body to facilitate the connection of the line thereto, the connector comprising an eyebolt supported for axial sliding movement relative to the floating body in a passage that is defined thereon and extends along the forward direction; a termination device carried on the floating body and operably linked with the motor to terminate operation thereof upon actuation of the termination device; and a starting device operatively linked with the motor and comprising: wherein the termination device comprises: