Wikipedia
The DW-link is a subset of the common four-bar system used widely in bicycle suspension. The four-bar system has been used on mountain bikes since the early days of suspension. Similar suspension systems to the DW-link have been used by Schwinn, Fisher and Karpiel. Currently a similar system is used by Giant and named "Maestro". DW-link gets its name from the designer and patent holder, mechanical engineer Dave Weagle. Currently the DW-link has been licensed to the following bicycle companies: Ibis, Independent Fabrication, Iron Horse Bicycles, Turner Suspension Bicycles, and Pivot Cycles. The DW-link suspension design was used to win six Elite level UCI downhill World Championships from 2005 to 2007, the highest contested level of the sport. This winning streak made the dw-link the most successful linkage suspension platform in the history of the sport of downhill. Dave Weagle also developed the Split Pivot suspension and Delta System which are both used in cycling.
Weagle's design currently holds multiple patents, including US7128329, which is the world's first and remains to be the only published account on the method of mathematically and geometrically characterizing linkage chain/ belt-driven, and shaft-driven motorcycle and bicycle suspensions. The 7128329 introduced several new concepts and measurements to the suspension world, specifically the concept of characterizing anti-squat as a curve or area when graphed as a function of anti-squat versus compressive travel. The portfolio also proposed the same basic measurement for braking squat versus compressive travel distance. These measurements are now accepted as "anti-squat curves" and "braking squat curves" by some professionals in the field of vehicle suspension dynamics.