Connector for agricultural tubes and toolbars

Toolbar structure for an implement adapted for movement over the ground in a forward direction, the toolbar structure including first and second tubes of rectangular cross section, each tube having opposed top and bottom faces spaced a preselected distance apart and opposite front and rear sides defining upper and lower pairs of tube corners, a bracket structure connecting the first and second tubes in generally parallel and offset relationship with the first tube behind the second tube and, when in use, with the top and bottom faces generally parallel to the ground, the bracket structure comprising:

• top and bottom angles having horizontal flanges embracing, respectively, the top and bottom faces of the first tube, the angles also including first and second upright flanges projecting in opposite vertical directions from the faces;
• first and second tube gripping members fixed to the first and second upright flanges, respectively, and projecting vertically along portions of the opposite sides towards the opposite faces, the tube gripping members embracing the first and second tubes adjacent the tube corners and including a central upright member spacing the tubes the preselected distance;
• and
• a bolt structure selectively clamping and unclamping the horizontal flanges against the top and bottom faces and maintaining the tube gripping members against the tubes.