A rigid caltrop structure is formed of two metallic members abutting each other and welded together, each of the members including all of a single triangular planar portion and parts of two other adjoining triangular planar portions, the pairs of adjacent corners of sides of the triangular portions forming penetration points so that when three of the penetration points rest on a horizontal surface and the fourth penetration point projects upward, a force applied to that fourth penetration point will not directly tend to shear the weld.
申请公布号
US5921703(A)
申请公布日期
1999.07.13
申请号
US19970882515
申请日期
1997.06.25
申请人
BECKER, JONATHAN B.;DALA, MARTIN L.;NIX, BRYAN R.;TRNOVEC, LOUIS G.
发明人
BECKER, JONATHAN B.;DALA, MARTIN L.;NIX, BRYAN R.;TRNOVEC, LOUIS G.