Railway tank cars

Claim 1

A RAILWAY TANK CAR COMPRISING A LONGITUDINALLY EXTENDING TUBULAR BODY SHELL DEFINING INDEPENDENTLY OF OTHER STRUCTURAL ELEMENTS A COMPLETE FLUID-TIGHT ENCLOSURE, SAID BODY SHELL BEING OF SELF-SUPPORTING RIGID CONSTRUCTION AND INCLUDING A CENTRAL SECTION AND A PAIR OF SUBSTANTIALLY INDENTICAL INTERMEDIATE TRANSITION SECTIONS AND A PAIR OF SUBSTANTIALLY IDENTICAL END SECTIONS AND A PAIR OF SUBSTANTIALLY IDENTICAL END HEADS, SAID CENTRAL SECTION BEING GENERALLY CYLINDRICAL AND HAVING A RELATIVELY LARGE MAXIMUM LATERAL DIMENSION, EACH OF SAID END SECTIONS BEING GENERALLY CYLINDRICAL AND HAVING A RELATIVELY SMALL MAXIMUM LATERAL DIMENSION, EACH OF SAID INTERMEDIATE TRANSITON SECTIONS BEING GENERALLY FRUSTO-CONICAL AND INCLUDING AN INNER END SUBSTANTIALLY CONFORMING TO THE ADJACENT OUTER END OF SAID CENTRAL SECTION AND AN OUTER END SUBSTANTIALLY CONFORMING TO THE INNER END OF THE ADJACENT ONE OF SAID END SECTIONS, EACH OF SAID END HEAD BEING SUBSTANTIALLY CUP-SHAPED AND INCLUDING AN INNER END SUBSTANTIALLY CONFORMING TO THE OUTER END OF THE ADJACENT ONE OF SAID END SECTIONS, THE TOP OF SAID CENTRAL SECTION AND THE TOPS OF SAID INTERMEDIATE TRANSITION SECTIONS AND THE TOPS OF SAID END SECTIONS BEING DISPOSED IN A SUBSTANTIALLY HORIZONTAL UPPER PLANE, THE BOTTOM OF SAID CENTRAL SECTION BEING DISPOSED IN A SUBSTANTIALLY HORIZONTAL LOWER PLANE AND THE BOTTOMS OF SAID END SECTIONS BEING DISPOSED IN A SUBSTANTIALLY HORIZONTAL INTERMEDIATE PLANE AND THE BOTTOMS OF SAID INTERMEDIATE TRANSITION SECTIONS BEING RESPECTIVELY DISPOSED IN TWO OTHER PLANES GENERALLY UPWARDLY AND OPPOSITELY OUTWARDLY INCLINED FROM SAID LOWER PLANE, WHEREBY SAID BODY SHELL IS OF FISH-BELLY CONFIGURATION, A PAIR OF LONGITUDINALLY ALIGNED NARROW STUB DRAFT SILLS RESPECTIVELY ARRANGED ADJACENT TO THE OPPOSITE ENDS OF SAID BODY SHEEL WITH THE INNER ENDS OF SAID STUB DRAFT SILLS RESPECTIVELY DISPOSED BELOW THE BOTTOMS OF SAID END SECTIONS AND WITH THE OUTER ENDS OF SAID STUB DRAFT SILLS RESPECTIVELY PROJECTING LONGITUDINALLY OUTWARDLY BEYOND SAID END SECTIONS, A PAIR OF LATERALLY EXTENDING BODY BOLSTERS RESPECTIVELY RIGIDLY SECURED TO THE BOTTOMS OF SAID END SECTIONS, A PAIR OF LATERAL EXTENDING FIRST SILL BOLSTERS RESPECTIVELY RIGIDLY SECURED TO THE INNER ENDS OF SAID STUB DRAFT SILLS, THE OPPOSITE ENDS OF EACH ONE OF SAID FIRST SILL BOLSTERS RESPECTIVELY EXTENDING LATERALLY OUTWARDLY FROM THE OPPOSITE SIDES OF THE CORRESPONDING ONE OF SAID STUB DRAFT SILLS, A PAIR OF FIRST CENTER PIN-BEARING STRUCTURES RESPECTIVELY INTERCONNECTING SAID BODY BOLSTERS AND SAID FIRST SILL BOLSTERS, WHEREBY EACH OF SAID STUB DRAFT SILLS IS MOUNTED FOR ARTICULATE MOTION ABOUT THE VERTICAL AXIS OF THE ADJACENT ONE OF SAID FIRST CENTER PIN-BEARING STRUCTURES WITH RESPECT TO THE ADJACENT END OF SAID BODY SHELL, A PAIR OF TRUCKS RESPECTIVELY ARRANGED BELOW THE INNER ENDS OF SAID STUB DRAFT SILLS AND RESPECTIVELY CARRYING A PAIR OF LATERALLY EXTENDING TRUCK BOLSTERS, A PAIR OF LATERALLY EXTENDING SECOND SILL BOLSTERS RESPECTIVELY RIGIDLY SECURED TO THE INNER ENDS OF SAID STUB DRAFT SILLS, THE OPPOSITE ENDS OF EACH ONE OF SAID SECOND SILL BOLSTERS RESPECTIVELY EXTENDING LATERALLY OUTWARDLY FROM THE OPPOSITE SIDES OF THE CORRESPONDING ONE OF SAID STUB DRAFT SILLS, A PAIR OF SECOND CENTER PIN-BEARING STRUCTURES RESPECTIVELY INTERCONNECTING SAID TRUCK BOLSTERS AND SAID SECOND SILL BOLSTERS, WHEREBY EACH OF SAID TRUCKS IS MOUNTED FOR ARTICULATE MORTION ABOUT THE VERTICAL AXIS OF THE ADJACENT ONE OF SAID SECOND CENTER PIN-BEARING STRUCTURES WITH RESPECT TO THE ADJACENT ONE OF SAID STUB DRAFT SILLS, AND A PAIR OF DRAFT GEARS RESPECTIVELY CARRIED BY THE OUTER ENDS OF SAID STUB DRAFT SILLS.