Patent ID: 7025527

Claim:
A highway marker comprising, a cylinder formed from a rigid material; a rigid cylindrical core having a threaded center opening therethrough and having a length that is less than the length of said rigid cylinder and a diameter that is less than the interior diameter of said cylinder to be spaced apart from said cylinder so as to be movable up and down therein; a disk shaped cap for mounting onto a top of said rigid core, extending beyond the side of said core and is spaced apart from the inner circumference of said rigid cylinder, and which said cap has a raised center collar wherefrom sloping ribs extend at equal spaced radials to the cap edge, with said ribs sloping from the top of said collar to said cap edge, and said collar includes a center hole for receiving a bolt fitted therethrough for turning is said rigid core threaded center opening; and a section of resilient rubber that is bonded on it's opposite ends to the opposing outer surface of said rigid core and the inner surface of said rigid cylinder, filling the spaced between said rigid core outer surface and said rigid cylinder inner circumference, leaving a void between the bottom of said rigid core and the lower edge of said rigid cylinder that said rigid core is suspended in at an end of said resilient rubber, allowing said rigid core to move downwardly by a downwardly directed force, stretching said resilient rubber that then rebounds, lifting said rigid core out of said void, when said downwardly directed force is removed.