Telescoping loader lift arm

A telescoping lift arm assembly having a longitudinal axis and comprising an outer lift arm tube, and an inner lift arm tube, the outer lift arm tube having side wall portions that are spaced apart to define an open space, and joined by a top wall, and the outer lift arm tube having an open lower side, the side wall portions having outwardly flared panels extending at oblique angles relative to a central longitudinal plane bisecting the space between the side wall portions at the lower side of the outer lift arm tube, the inner lift arm tube fitted between the side wall portions of the outer lift arm tube and having outwardly flared flanges at a lower side parallel to the outwardly flared panels on the outer lift arm tube, the inner lift arm tube having support surfaces at the lower side thereof, and a support plate mounted to the lower side of the outer lift arm tube extending between the side wall portions and engaging the support surfaces of the inner lift arm tube to slidably hold at least portions of the inner lift arm tube with the outwardly flared flanges adjacent the outwardly flared panels of the outer lift arm tube, the support plate being mounted with fasteners that adjustably support the support plate on the outer lift arm tube in position to support the inner lift arm tube within the open space between the side wall portions of the outer lift arm tube.

A telescoping lift arm assembly comprising an outer arm having side walls that flare outwardly at lower portions of the side walls, and have inner surfaces that face toward a center plane of the outer arm, a bell shaped cross section inner arm nested in the outer arm with outwardly extending wall portions forming the bell shape of the inner arm having outwardly facing surfaces nesting with the inner surfaces of the outwardly flared side walls of the outer arm, and a support plate secured to the outer arm to slidably support the inner arm with the outwardly extending wall portions forming the bell shape slidably guided by the inner surfaces of the outwardly flared side walls of the outer arm.

A telescoping arm assembly having a longitudinal axis, comprising an outer arm and an inner arm, the outer arm having longitudinally extending outer arm side wall portions that are spaced apart and joined by a top wall, the outer arm having a lower side, the outer arm side wall portions having first outwardly flared panels adjacent the lower side extending at oblique angles laterally outwardly relative to a central longitudinal plane bisecting the space between the outer arm side wall portions, the inner arm fitted between the outer arm side wall portions and having inner arm side wall portions complementary in shape to the outer arm side wall portions, the inner arm side wall portions having second outwardly flared panels adjacent to the first outwardly flared panels of the outer wall, the inner arm having a laterally extending support wall at a lower side thereof, and a removable support plate mounted to the lower side of the outer arm to slidably support the inner arm support wall and support the second inner arm outwardly flared panels adjacent to the outer wall first outwardly flared panels.

A telescoping arm assembly comprising an outer arm having an inverted U-shape with spaced longitudinal outer side walls that have planar longitudinal flanges that flare outwardly at lower portions of the outer side walls, a bell shaped cross section inner arm nested in the outer arm including planar wall flared sections forming the bell shape nesting with and having outer surfaces slidably guided by lower surfaces of the planar outwardly flared flanges of the outer arm side walls.