Fast jack liftboat jacking system

Abstract

An improved jacking system for a liftboat with a high speed manifold system with high speed motors and high speed planetary gear drives, a heavy lift manifold system with heavy lift motors and heavy lift planetary gear drives, and bypass valves for diverting hydraulic pressure between the high speed manifold system and the heavy lift manifold system. The improved jacking system makes the boat easier to position precisely and expands the weather and sea condition envelope the liftboat can operate in by reducing its exposure to multiple impact stresses while jacking up in rough sea conditions. The improved jacking system also serves as a safety device which can quickly “tag” the bottom to stop and stabilize the liftboat's motion in a close situation.

1 . An improved jacking system for a liftboat comprising a high speed manifold system with high speed motors and high speed planetary gear drives, a heavy lift manifold system with heavy lift motors and heavy lift planetary gear drives, and bypass valves for diverting hydraulic pressure between the high speed manifold system and the heavy lift manifold system. 
     
     
         2 . The jacking system of  claim 1  further comprising clutches between the high speed motors and high speed planetary gear drives and between the heavy lift motors and heavy lift planetary gear drives. 
     
     
         3 . The jacking system of  claim 2  further comprising remote controls for the high speed manifold system and heavy lift manifold system. 
     
     
         4 . The jacking system of  claim 3  wherein the remote controls further comprise remote controls for the high speed motors, the high speed planetary gear drives and clutches, the heavy lift motors and heavy lift planetary gear drives and clutches, and the bypass valves. 
     
     
         5 . The jacking system of  claim 3  further comprising pressure switch controls.