Patent ID: 8950386
Filing Date: 2015-02-10
Classification: F41B

Abstract:
1. A ball feeding arrangement comprising: a rotor element for pushing a ball; a transmission element connected to said rotor element; and a drive element for driving a rotational movement of said rotor element via said transmission element, said drive element configured to be driven by a drive motor, wherein one of said drive element and said transmission element has at least one protrusion, and the other of said drive element and said transmission element has an oscillating guiding surface adapted to guide the at least one protrusion during relative rotation between said drive element and said transmission element, wherein said at least one protrusion is yieldingly biased against said guiding surface, wherein the biasing force, a shape of said guiding surface and a shape of said at least one protrusion are adapted to enable transfer of a rotational force of a given magnitude from said drive element to said transmission element such that a relative rotation between said drive element and said transmission element occurs when said rotor element is subject to a rotational resistance greater than said given magnitude, wherein the biasing force, a shape of said guiding surface and a shape of said at least one protrusion are further adapted such that, occasionally during relative rotation between said drive element and said transmission element, a pressure is generated between said at least one protrusion and said guiding surface that urges said transmission element to rotate in a rotational direction opposite a rotational direction of the drive element.