Chassis frame

Claim 2

A frame for carrying vehicle-towed trailers comprising: two principal metal beams of a closed ''''C'''' cross-section joined to one another at one end and apart at the other end; a rear traverse beam joining said principal beams at the open end thereof; at least one median traverse beam attached to the interiors of said principal beams and extending therebetween at a position between the ends of said principal beams; a frontal traverse beam attached to the interiors of said principal beams and extending therebetweEn at a position between said median traverse beam and said joined end of said principal beams; and a lateral traverse beam attached to the exterior of each of said principal beams at a position opposite one of said median traverse beams, whereby the frame may be coupled to the towing vehicle at the apex of the frame and wherein said traverse beams do not extend above the upper surface of said principal beams.

Claim 3

A frame in accordance with claim 1 wherein: said principal beams are positioned such that the solid side of said ''''C'''' cross-section is facing externally.

Claim 4

A frame in accordance with claim 2 wherein: said rear traverse beam, said median traverse beams and said frontal traverse beam are of a ''''Z''''-shaped cross-section.

Claim 5

A frame in accordance with claim 3, further including: a floor board fixation bracket attached to the exterior of each of said principal beams opposite said frontal traverse beam.

Claim 6

A frame in accordance with claim 4 further including: an axle fixation element attached to the exterior of each of said principal beams.

Claim 7

A frame in accordance with claim 5, further including: an axle reinforcement element attached to the interior of each of said principal beams at a position opposite said axle fixation elements.

Claim 8

A frame in accordance with claim 6, further including: a corner abutment attached to each of said principal beams and extending above the plane of said beams for positioning the trailer on the frame.

Claim 9

A frame in accordance with claim 7, further including: a frontal reinforcement element positioned on the internal side of each of said principal beams between said frontal traverse and said principal beams.

Claim 10

A frame in accordance with claim 8, further including: a second lateral traverse beam attached to the exterior of each of said principal beams at a position opposite said frontal traverse beam.

Claim 11

A frame for carrying vehicle-towed trailers comprising: two principal metal beams joined to one another at one end and apart at the other end, said principal beams having a closed ''''C'''' cross-section and being positioned such that the soled side of said ''''C'''' cross-section is facing externally; a rear traverse beam joining said principal beams at the open end thereof; at least one median traverse beam connected to said principal beams at a position between the ends of said principal beams; a frontal traverse beam attached to said principal beams at a position between said median traverse beam and said joined end of said principal beams wherein said rear traverse beam, said median traverse beam and said frontal traverse beam are of a ''''Z'''' shaped cross-section; a lateral traverse beam attached to the exterior of each of said principal beams at a position opposite one of said median traverse beams; a floor board fixation bracket attached to the exterior of each of said principal beams opposite said frontal traverse beam; an axle fixation element attached to the exterior of each of said principal beams; and an axle reinforcement element attached to the interior of each of said principal beams at a position opposite said axle fixation elements.

Claim 12

A frame for carrying vehicle-towed trailers comprising: two principal metal beams joined to one another at one end and apart at the other end, said principal beams having a closed ''''C'''' cross-section and being positioned such that the soled side of said ''''C'''' cross-section is facing externally; a rear traverse beam joining said principal beams at the open end thereof; at least one median traverse beam connected to said principal beams at a position between the ends of said principal beams; a frontal traverse beam attached to said principal beams at a position between said median traverse beam and said joined end of said principal beams wherein said rear traverse beam, said median traverse beam and said frontal traverse beam are of a ''''Z'''' shaped cross-section; a lateral traverse beam attached to the exterior of each of said principal beams at a position opposite one of said median traverse beams; a floor board fixation bracket attached to the exterior of each of said principal beams opposite said frontal traverse beam; an axle fixation element attached to the exterior of each of said principal beams; and an axle reinforcement element attached to the interior of each of said principal beams at a position opposite said axle fixation elements.