Self-propelled all terrain track driven trench box carrier

Abstract

A self-propelled all terrain track driven trench box carrier, comprising a main frame, a pair of side frame members, a pair of transversely adjustable end wall frame members and detachable attachable extension structure members. A cat-walk, hand rails, access ladders and safety rails. A pair of adjustable hydraulic wheel track assemblies mounted along the two sides, supporting the apparatus, and allowing the trench box carrier to be propelled along the ground. A pair of detachable attachable extension structure members, for adjusting the width of the trench box carrier, to accommodate different widths of a trench. Adjustable wheel track connectors are detachably attached with an extension axle, to increase the overall wheel base of a trench box carrier for work on oversize trenches. A plurality of hydraulic cable wenches for controlling a trench shield. A main engine power supply for operating a self-propelled all terrain trench box carrier.

What is claimed is:  
     
         1 . A self-propelled all terrain track driven trench box carrier comprising: 
 a main frame having first and second spaced apart longitudinally extending side walls, and a first and second spaced apart, transversely interconnecting extending adjustable opposite end structure member walls joining said side walls;    a hydraulic track assembly (adjustable) attached along the side wall frames and supporting the main frame;    a cat-walk assembly attached atop the main frame;    a safety rail assembly attached atop the main frame;    a main engine power supply;    a plurality of hydraulic cable wenches; and    a hydraulic system for operating, propelling and controlling the trench box carrier.    
     
     
         2 . The self-propelled all terrain track driven trench box carrier of  claim 1 , wherein the drive tracks are individually driven by transmission of a pressurized hydraulic fluid generated by the pump to perspective hydraulic motors which propel the drive tracks forward or backward.  
     
     
         3 . The self-propelled all terrain track driven trench box carrier of  claim 1 , wherein having means of increasing the wheel base width of the above stated main frame, said means comprising a detachably attachable frame extension structure member attached between the above stated transversely extending adjustable end wall structure members.  
     
     
         4 . The self-propelled all terrain track driven trench box carrier of  claim 1 , wherein having additional means of extending the wheel track base of the above stated track assembly, said means comprising a detachably attachable extension axle member attached between a main frame wheel connector and a wheel track hub connector.  
     
     
         5 . The self-propelled all terrain track driven trench box carrier of  claim 1 , wherein having a cat-walk structure means, said means comprising a cat-walk structure frame attached atop the main frame of the trench box carrier, and a cat-walk deck attached to the cat-walk structure frame.  
     
     
         6 . The self-propelled all terrain track driven trench box carrier of  claim 1 , and  claim 5 , wherein the cat-walk of  claim 5 , having access means to said cat-walk deck, said means comprising a plurality of access ladders and hand rails.  
     
     
         7 . The self-propelled all terrain track driven trench box carrier of  claim 1 , wherein having a safety rail means, said safety rail means comprising a double safety rail, one to the inside of the cat-walk and one to the outside of the cat-walk of  claim 1 ,  5  and  6 , said safety rails attached to the main frame.  
     
     
         8 . The self-propelled all terrain track driven trench box carrier of  claim 1 , wherein having a main engine power supply means for powering the hydraulics of the trench box carrier.  
     
     
         9 . The self-propelled all terrain track driven trench box carrier of  claim 1 , wherein having a plurality of hydraulic cable wench means for connecting, lowering, raising, controlling and leveling a trench shield.  
     
     
         10 . The self-propelled all terrain track driven trench box carrier of  claim 1 , wherein having a hydraulic system comprising, a main engine power supply, hydraulic track motors, hydraulic cable wenches and individual hydraulic controls, for operating, propelling and controlling a trench box carrier and powering the hydraulic wenches.