Swivel seat with hydraulic connections

Abstract

A swivel seat for work vehicle includes an operator seat mounted on a seat swivel, the seat swivel defining a central aperture through which at least one hydraulic line with a swivel extends.

1 . A swiveling seat for work vehicle, comprising:
 an operator seat having a pedestal;   a seat swivel having a top plate on which the pedestal is fixed and a bottom plate, wherein the top and bottom plates are configured to swivel with respect to each other about a swivel axis, the seat swivel having a central aperture through which the swivel axis extends;   at least one hydraulic line extending through the central aperture, the at least one hydraulic line including a first hydraulic swivel joint.   
     
     
         2 . The swiveling seat of  claim 1 , further comprising a second hydraulic line extending through the central aperture, the second hydraulic line further including a second hydraulic swivel joint. 
     
     
         3 . The swiveling seat of  claim 1 , wherein the first hydraulic swivel joint is configured to let ends of the at least one hydraulic line swivel with respect to one another when the top plate swivels with respect to the bottom plate. 
     
     
         4 . The swiveling seat of  claim 2 , wherein the second hydraulic swivel joint is configured to let ends of the second hydraulic line swivel with respect to one another when the top plate swivels with respect to the bottom plate. 
     
     
         5 . The swiveling seat of  claim 2 , wherein the first and second hydraulic swivel joints are coupled together to prevent the at least one hydraulic line and the second hydraulic line from twisting about each other. 
     
     
         6 . The swiveling seat of  claim 2 , wherein the first and second hydraulic swivel joints are formed in a single unit having four ports, of which two ports are disposed in an upper plate of the unit and two ports are disposed in a lower plate of the unit. 
     
     
         7 . The swiveling seat of  claim 6 , wherein ports on the upper plate communicate with ports on the lower plate through aligned circular recesses in abutting faces of the two plates. 
     
     
         8 . A swiveling seat for work vehicle, comprising:
 an operator seat;   a seat swivel having a top member on which the seat is fixed, a bottom member and a central aperture through both the top member and bottom member, wherein the top and bottom members are configured to swivel with respect to each other about a swivel axis;   a first hydraulic line extending through the central aperture, wherein the at least one hydraulic line comprises a first hydraulic swivel joint fluidly coupling two ends of the hydraulic line together.   
     
     
         9 . The swiveling seat of  claim 8 , further comprising a second hydraulic line extending through the central aperture, the second hydraulic line further including a second hydraulic swivel joint. 
     
     
         10 . The swiveling seat of  claim 8 , wherein the first hydraulic swivel joint is configured to let ends of the first hydraulic line swivel with respect to one another when the top member swivels with respect to the bottom member. 
     
     
         11 . The swiveling seat of  claim 9 , wherein the second hydraulic swivel joint is configured to let ends of the second hydraulic line swivel with respect to one another when the top member swivels with respect to the bottom member. 
     
     
         12 . The swiveling seat of  claim 9 , wherein the first and second hydraulic swivel joints are coupled together to thereby prevent the first hydraulic line and the second hydraulic line from twisting around each other. 
     
     
         13 . The swiveling seat of  claim 9 , wherein the first and second hydraulic swivel joints are formed in a single body comprised of an upper plate and a lower plate, wherein two ports are disposed in the body's upper plate and two ports are disposed in the body's lower plate. 
     
     
         14 . The swiveling seat of  claim 13 , wherein the two ports on the upper plate are in fluid communication with the two ports on the lower plate by aligned recesses formed in abutting faces of the upper plate and the lower plate through which hydraulic fluid passes.