Patent ID: 7765699

Claim:
A method of forming a space frame for a cab, comprising: forming each of a pair of hydroformed, longitudinally extending inner side rails, each of a pair of hydroformed, longitudinally extending outer side rails, a hydroformed connecting member, a hydroformed first upper cross member, each of a pair of hydroformed upper longitudinal members, and each of a pair of hydroformed A-pillar members by a method comprising, providing a tubular metallic blank having a tubular metallic wall; placing the tubular metallic blank into a die cavity of a die assembly, the die cavity having die surfaces, and providing a high pressure fluid into an interior of the blank to expand the metallic wall of the central portion of the blank outwardly into conformity with the surfaces of the die cavity to define the respective hydroformed member; mounting the connecting member to each of the inner side rails and to each of the outer side rails, wherein the inner side rails are in laterally spaced relation to the outer side rails; mounting the first upper cross member to said connecting member; mounting each of the upper longitudinal members to the first upper cross member; and mounting each of the A-pillar members to one of the upper longitudinal members.