| 摘要 |
A ball transfer device is disclosed herein. An embodiment of the ball transfer device includes a chamber, a first ball, and a second ball. A first opening and a second opening extend into the chamber. A cavity extends from the chamber and has a cavity opening connected to the second opening. The first ball is movable within the chamber between a first position and a second position, wherein a portion of the first ball is movable into the first opening when the first ball is in the first position, and wherein the first ball is located between the first opening and the second opening. The second ball is located in the cavity, wherein the second ball is movable within the cavity between a first position and a second position, wherein a portion of the second ball is movable into the chamber when the second ball is in the first position, and wherein the first ball is located between the cavity and the cavity opening. The second ball is contactable with the first ball when the second ball is in the first position.
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