Abstract: A spray boom assembly includes a first boom frame and a second boom frame pivotally coupled via a hinge assembly to the first boom frame about a pivot axis. The spray boom also includes an actuator assembly for pivoting the second boom frame relative to the first boom frame. The hinge assembly includes a first joint location, a second joint location, a third joint location, a fourth joint location, and a fifth joint location. A first end of the actuator assembly is coupled to the hinge assembly at the fourth joint location and a second end thereof is coupled to the first boom frame at a sixth joint location. A spherical joint is located at at least three of the first, second, third, fourth, fifth and sixth joint locations.

Abstract: A rotary blower (26) includes a torsion damping mechanism for transmitting torque from an input drive (48) to a first timing gear (62), the mechanism including an input hub (52), an output hub (64), and a torsion spring (70) having an input end (72) and an output end (74). The housing (42) defines a chamber (44) containing fluid rotation of the timing gears resulting in an air-oil mist. The input hub and output hub define an axial gap (82) intermediate the input and output ends of the torsion spring. The output hub (64) defines an angled passage (86) having a radially outer end (84) in communication with the axial gap (82), and a radially inner end, whereby rotation generates a flow of the air-oil mist through the angled passage (86) and between the outer cylindrical surface of the hubs and the inside surface (76) of the torsion spring (70).