Patent ID: 9702137
Date: 2017-07-11
CPC Classifications: B21D,E02B,E04B,E04H,F03D,F05B,Y02E,Y10T

Claim:
1. A node structure for connecting a member of a lattice frame to one or more other members of the frame, the node structure comprising: a hollow brace having opposed walls that converge outwardly at an acute angle in cross-section toward a central plane to connect at an outer edge, the outer edge defining a solid curved surface at an outer periphery of the brace, the solid curved surface defining a portion of an outer surface of the brace; and at least one root portion being a root end of a member of the frame or being for attachment to a member of the frame, which root portion has a central longitudinal axis extending outwardly in the central plane of the brace, wherein the root portion has an inner end cut away at opposite sides around the central plane to leave a joining surface that engages the outer surface and the solid curved surface of the brace without penetrating through the brace so as to extend into contact with both of the opposed walls on opposite sides of the outer edge and thereby embrace an outer region of the brace extending inwardly from the outer edge, wherein the root portion is joined to the brace at the engagement between the joining surface and the outer surface.