[It’s on my MIND] designed a clever BB blaster featuring a four-bar linkage that prints in a single piece and requires no additional hardware. The interesting part is how it turns a trigger pull into ...

The four bar linkage is a type of mechanical linkage that is used in many different devices. A few examples are: locking pliers, bicycles, oil well pumps, loaders, internal combustion engines, ...

Here's how to design mechanical linkages without solving a single trig equation. Modern CAD systems include powerful sketching tools. One application that gets little publicity helps design mechanical ...