Trailer chassis

Abstract

A trailer chassis is described which includes a gooseneck structure at the forward end thereof to which a two-point beam hitch assembly may be secured or a front axle tongue hitch assembly may be secured. The trailer may also function as a fifth wheel hitch.

1 . A trailer chassis comprising:
 an elongated wheeled frame means having a rearward end and a forward end;   a gooseneck assembly at the forward end of said wheeled frame;   said gooseneck assembly including an upstanding frame portion having upper and lower ends with the lower end thereof being secured to the forward end of said wheeled frame, a forwardly extending frame portion having rearward and forward ends with the rearward end thereof being secured to the upper end of said upstanding frame portion, and a king pin extending downwardly from said forwardly extending frame portion adjacent the forward end thereof;   an elongated carrier beam having rearward and forward ends;   said carrier beam being selectively secured at its rearward end to said wheeled frame means at the forward end thereof and extending forwardly therefrom;   a rocker box assembly;   said rocker box assembly being selectively rotatably secured to said king pin between first and second positions;   said rocker box assembly, when in its said first position, being pivotally and selectively removably secured to said carrier beam between the rearward and forward ends thereof about a horizontally disposed axis which is transverse to the longitudinal axis of said carrier beam;   a pivot head;   said pivot head being pivotally secured to said forward end of said carrier beam about a vertically disposed axis;   an elongated horizontally disposed two-point beam having first and second ends;   said two-point beam being normally disposed transversely to the longitudinal axis of said carrier beam;   said two-point beam being pivotally secured to said pivot head about a horizontally disposed axis which is parallel to the longitudinal axis of said carrier beam and said wheeled frame means;   said two-point beam having structure thereon for attachment o a prime mover having a two-point hitch thereon;   and a front axle assembly including an elongated front axle having wheels at the ends thereof, and a hitch tongue secured to said front axle and extending forwardly therefrom;   said front axle assembly being selectively removably and pivotally secured to said rocker box assembly about a horizontally disposed axis when said carrier beam, said pivot head, and said two-point beam have been disconnected from said wheeled frame means and said rocker box assembly has been rotated from its said first position to its said second position with respect to said king pin.   
     
     
         2 . The trailer chassis of  claim 1  wherein said king pin may be secured to a fifth wheel structure on a prime mover when said rocker box assembly, said carrier beam, said pivot head, said two-point beam and said front axle assembly are disconnected from said wheeled frame means. 
     
     
         3 . The tractor chassis of  claim 1  wherein a support leg assembly is selectively removably attachable to said two-point beam. 
     
     
         4 . A trailer chassis comprising:
 an elongated wheeled frame means having a rearward end and a forward end;   a gooseneck assembly rigidly secured to at the forward end of said wheeled frame;   said gooseneck assembly including an upstanding frame portion having upper and lower ends with the lower end thereof being secured to the forward end of said wheeled frame means, a forwardly extending frame portion having rearward and forward ends and upper and lower sides with the rearward end thereof being secured to the upper end of said upstanding frame portion, and a king pin extending downwardly from said king pin support;   an elongated carrier beam having rearward and forward ends;   said carrier beam being selectively secured at its rearward end to said wheeled frame means at the forward end thereof and extending forwardly therefrom;   a rocker box assembly having an upper end and a lower end;   said rocker box assembly having a horizontally disposed fifth wheel at the upper end;   said fifth wheel on said rocker box assembly having a king pin receiving opening formed therein;   said rocker box assembly being secured to said king pin;   said rocker box assembly, being selectively removably secured to said carrier beam between the rearward and forward ends thereof about a horizontally disposed axis which is parallel to the longitudinal axis of said carrier beam;   a pivot head having a forward end, a rearward end, an upper end and a lower end;   said rearward end of said pivot head being pivotally secured to said forward end of said carrier beam about a vertically disposed axis;   a front axle assembly including an elongated front axle having wheels at the ends thereof, and a hitch tongue secured to said front axle and extending forwardly therefrom;   said front axle assembly being selectively removably and pivotally secured to said rocker box assembly about a horizontally disposed axis when said carrier beam has been disconnected from said wheeled frame means   
     
     
         5 . The trailer chassis of  claim 4  wherein said king pin may be secured to a fifth wheel structure on a prime mover when said rocker box assembly and said carrier beam have been disconnected from said wheeled frame means.