Tony Marfione designs some pretty cool stuff but my favorites are Rob Dalton and Paul Panak. Here's one by Paul Panak. I've actually picked this one up and it is HEAVY: <blockquote class="instagram-media" data-instgrm-captioned data-instgrm-version="6" style=" background:#FFF; border:0; border-radius:3px; box-shadow:0 0 1px 0 rgba(0,0,0,0.5),0 1px 10px 0 rgba(0,0,0,0.15); margin: 1px; max-width:658px; padding:0; width:99.375%; width:-webkit-calc(100% - 2px); width:calc(100% - 2px);"><div style="padding:8px;"> <div style=" background:#F8F8F8; line-height:0; margin-top:40px; padding:50.0% 0; text-align:center; width:100%;"> <div style=" background:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACwAAAAsCAMAAAApWqozAAAAGFBMVEUiIiI9PT0eHh4gIB4hIBkcHBwcHBwcHBydr+JQAAAACHRSTlMABA4YHyQsM5jtaMwAAADfSURBVDjL7ZVBEgMhCAQBAf//42xcNbpAqakcM0ftUmFAAIBE81IqBJdS3lS6zs3bIpB9WED3YYXFPmHRfT8sgyrCP1x8uEUxLMzNWElFOYCV6mHWWwMzdPEKHlhLw7NWJqkHc4uIZphavDzA2JPzUDsBZziNae2S6owH8xPmX8G7zzgKEOPUoYHvGz1TBCxMkd3kwNVbU0gKHkx+iZILf77IofhrY1nYFnB/lQPb79drWOyJVa/DAvg9B/rLB4cC+Nqgdz/TvBbBnr6GBReqn/nRmDgaQEej7WhonozjF+Y2I/fZou/qAAAAAElFTkSuQmCC); display:block; height:44px; margin:0 auto -44px; position:relative; top:-22px; width:44px;"></div></div> <p style=" margin:8px 0 0 0; padding:0 4px;"> <a href="https://www.instagram.com/p/4YNeKgojFP/" style=" color:#000; font-family:Arial,sans-serif; font-size:14px; font-style:normal; font-weight:normal; line-height:17px; text-decoration:none; word-wrap:break-word;" target="_blank">#burnknives K-razor 1 of a kind with spikes damascus blade milled out in solid stainless steel. #knife#knifeaction#knifeaddict#knifeart#knifecollection#knifecommunity#knifefanatics#knifegasm#knifegrails#knifelife#knifenut#knifeporn#knifesale#knifestagram#knives#otfknives#usnfollow#USNstagram#knucles</a></p> <p style=" color:#c9c8cd; font-family:Arial,sans-serif; font-size:14px; line-height:17px; margin-bottom:0; margin-top:8px; overflow:hidden; padding:8px 0 7px; text-align:center; text-overflow:ellipsis; white-space:nowrap;">A video posted by PVK.vegas (@pvk.vegas) on <time style=" font-family:Arial,sans-serif; font-size:14px; line-height:17px;" datetime="2015-06-26T04:04:35+00:00">Jun 25, 2015 at 9:04pm PDT</time></p></div></blockquote> <script async defer src="//platform.instagram.com/en_US/embeds.js"></script>
Starting in the 1800's right up through WWI, there was a trend to make triangular blades for bayonets on military rifles and for trench knives. Exactly why is maybe not entirely clear, but the common story is that the three edged wound couldn't be easily stitched together and tended to pull apart while healing, which causes greater chance of sepsis, and makes bleeding much more difficult to stop. This is in contrast with flat bladed knife wounds which can be stitched back together neatly. In the telling, it is commonly recommended that twisting the blade while thrusting compounds the effect greatly. This is obviously accounted for in the "pre-twisted" nature of this knife. There is further a story that is oft-repeated that the blades were eventually banned from military use by one of the Geneva Conventions, though as far as I can tell, this is not true. I don't know whether this is proven fact or just commonly spouted bull**** retroactively invented to explain the sudden and ubiquitous appearance of triangular bayonet blades, but whoever made this knife apparently knows about the history of bayonets and this common explanation. A quick use of "Teh Googles" and triangle or tri-blade bayonet will find plenty of discussion of the subject on various internet forums.
Triangular bayonets are easier to make and have more strength for thrusting, thus last longer. That's the reason. There wouldn't really even be more blood loss. The OP knife is not a triangular blade.
It has three cutting edges. It is not technically triangular per se, but is an exaggerated example of the scooped out three edges found on every triangular bayonet I've seen. Hence the name, "Jagdkommando Integral Tri-Dagger Fixed Blade Knife" given in the OP. All the triangular bayonets I've seen have three edges, with concave semi-circular cut outs connecting each edge to the other two.
