You are talking about the ones on the bottom of page 2 here
By the way, I know a guy that got hit by one that came lose, and the scar in his forhead still looks like a flower!!
Thanks Giulietta, but no, that's not it. It was different. For some reason I seem to recall that it came from New Zealand, maybe Australia, and was being marketed here in the U.S. exclusively by a small purveyor of marine hardware -- the name that is suddenly popping into my head is SVHotwire - but that could be a memory aberration.
The one you linked to is another interesting one, though. I have always thought of that one as being similar to the Dutchman Boom Brake, i.e. with the line moving through a series of blocks. Does this mean Wichard is marketing two different kinds of breaks now?