The Compact Stowable Luffing Jib concept, US20170210604A1, theoretically folds up similar to a swiss army knife. It folds into a stowed package the same size and likely a lighter weight than a telescoping jib, and due to the geometry, it could have a greater capacity due to decreased moment on the main boom and zero moment on the jib except side load. It has yet to have been fully proven.
Compact Stowable Luffing Crane Jib
