Heave ho!

Q A recent Road & Track email newsletter featured a link to a video describing F1 suspension operation (see  here: www.youtube.com/watch?v=6Mxm_ Vb25II&t=30s).

Except for some specialised racing elements, the layout seems essentially similar to a double wishbone suspension found on many cars, but heave springs and heave dampers are new to me. I was a little uncertain if these are separate or combined parts, as in a coilover shock, but they are arranged to interconnect the right and left sides of the front suspension.

From what I can make out, these components work in an opposite way to an anti-roll bar, in that they are activated when both wheels are simultaneously in bump or droop, but not in roll.

My questions are firstly, what purpose do they serve? And secondly, since it looks like the device(s) would not be too difficult to add to a wishbone-equipped car,