double luffing nut Dravo Crane

grabcad

In the late '70s, I was employed as a millwright in a shipyard, working on a particular system. My model, while based on memory, remains unfinished; however, further details will be added. The assembly is quite sizeable, which may pose challenges for software programs. Repairing a 3x split case proved challenging. I have included the Dravo patent related to this system.