Patent ID: 7007630

Claim:
A safety marker device, comprising: (a) a base having an opening for stacking with another safety marker device; (b) a flexible means having a fast impulse response to direct and indirect perturbations, said flexible means positioned over said base, wherein said base supports said flexible means; and (c) a cover to cover said flexible means, wherein said cover is made of a flexible material and allows said fast impulse response to said direct and indirect perturbations, wherein said base being heavier than the combined weight of said flexible means and said cover, wherein said flexible means maintains in an original position in absence of said direct and indirect perturbations, and flexes from said original position to a bent position in presence of said direct and indirect perturbations, wherein said bent position is characterized by one or more parts of said flexible means flexed from their original position up to about 180 degrees with respect to said base, and wherein said safety marker device has a low center of gravity mainly due to said heavier base, whereby said low center of gravity facilitates in restoring said original position and whereby said heavier base facilitates said flexing.