Patent ID: 7216884

Claim:
An aluminum trailer frame for a boat, watercraft, snowmobile, all terrain vehicle, motorcycle or carry all trailer bed comprising: first and second aluminum side rails each having a straight section and a bowed forward section leading to a straight tip section, said forward bowed section of said first side rail formed to converge with the forward bowed section of said second side rail, each said side rail having a C-shaped cross section; at least two elongated, generally linear aluminum cross members, each cross member having a generally C-shaped cross section with an embedded generally C-shaped bolt head channel located at or near a mid-section of said C-shaped cross member, said C-shaped bolt head channel including opposing tabs which trap a bolt head in said bolt head channel, said bolt head channel extending a substantial length of said cross members; said cross members laterally mounted on longitudinally disposed opposing side rails thereby forming an open framework for said trailer; a load support system for said boat, watercraft, snowmobile, all terrain vehicle, motorcycle or carry all trailer bed including at least two beam supports mounting said load support system to said trailer, said beam supports movably mounted on said cross members via a plurality of bolts having bolt heads slidably disposed in said bolt head channels such that said beam supports are movably adjustable to accommodate said at least one of said boat, watercraft, snowmobile, all terrain vehicle, motorcycle or carry all trailer bed; wherein said pair of cross members are a rear cross member and a forward cross member, said rear cross member disposed at a rearward position spanning said opposing side rails and said forward cross member disposed at a forward position relative to said rear cross member between opposing side rails; said bunk beams are elongated beams, each bunk beam having a generally rectangular cross section and having, at or near a midline of one wall forming said rectangular cross section a bunk beam C-shaped bolt head channel with a opposing tabs which trap a bolt head in said bolt head channel, said beam supports each having an L-shaped bracket carrying a bunk beam bolt and a bunk beam bolt head, said bunk beam bolt head slidably disposed in said bunk beam bolt head channel thereby permitting said bunk beams to move forward and aft on said beam supports due to the sliding of bolt heads in said bunk beam bolt head channels.