Patent Number: 6,250,862

Title: Boxcar tiedown system using angled warp spikes

Abstract: Angled warp spikes enable secure attachment to the steel flooring of a railroad boxcar. Such flooring includes transverse slots with a curved depth profile. The warp spikes are designed to deform or warp as they are driven into a flooring slot and conform to the curved depth profile. Tiedown fixtures fabricated of steel plate can be attached to the floor of a boxcar by warp spikes driven through elongated openings in the fixture into slots in the boxcar flooring. Tiedown fixtures used with warp spikes provide a boxcar tiedown system to which tiedown load carrying members, such as cables, chains, braces and struts can be connected.

Inventors: Dunmire; Daniel F. (Stony Brook, NY)

Assignee: Davis Aircraft Products Co., Inc

International Classification: B60P 7/08 (20060101); B60P 7/06 (20060101); B60P 007/08 ()

Expiration Date: 06/26/2018