Abstract: An improved ball projecting apparatus for balls of various sizes, weights, materials and shapes, which utilizes air pressure supplied by a separate and independent source of flowing air, such as a leaf blower, to project balls. More specifically, it comprises of a barrel (10) of tubular form defining a linear air discharge axis. The barrel is attached on one end to the source of flowing air (11). A barrel hole (12) is formed in the barrel wall. Attached to the barrel is a tumbler casing (14). The casing has a hollow tubular formation. It has an entry hole (16) and a feed hole (19) formed on its wall directly opposite each other. The tumbler casing is attached and sealed at its feed hole to the barrel hole creating a path or feed port through the casing and into the barrel. Inside the casing is a tumbler (20) being of hollow tubular shell formation which is solid on all walls and ends except for a tumbler hole (22) formed on its wall, exposing the tumbler chamber into which a ball is deposited.

Abstract: A drive assembly is provided including first and second torque input and torque output sections coupled together for relative rotation and limited relative displacement along the axis of relative rotation thereof. The input section includes structure for applying rotational torque thereto and the output section includes structure for applying rotary torque to a rotary driven member. Spring structure is connected between the sections yieldingly biasing the latter toward one set of limit positions of displacement along said axis and one of the units includes a spiral ramp concentric with the axis of relative rotation and the other of the sections includes a follower engaged with the ramp. The spiral ramp terminates at one end thereof in a circumferential race concentric with the axis of relative rotation of the sections and in which the follower is guidingly receivable for continuous movement therethrough after movement along the ramp from the end thereof remote from the race into the latter.