Clutch assembly for chain-driven cart

A centrifugal, shaft-driven clutch apparatus comprising:

• a) an engine shaft for providing rotary power, the shaft having a free end portion, an open ended shaft bore that communicates with the free end portion, and a longitudinally extending key slot;
• b) a centrifugal clutch assembly that includes a clutch bushing member having a bushing member bore for affixing the bushing member to the shaft;
• c) the bushing member having an outer surface;
• d) the clutch assembly including a clutch housing member with an internal clutch housing bore, and the clutch housing member rotatably mounts upon the clutch bushing member at the clutch housing internal bore;
• e) the housing having an external surface with a sprocket thereon for driving a chain that is connected to the sprocket;
• f) a first port that extends radially through the engine shaft between the shaft bore and the bushing member bore for transmitting lubricant from the shaft bore to the clutch bushing member and wherein the first port extends through the shaft bore and to the key slot;
• g) a second port that extends through the bushing member from the bushing member bore to the bushing member outer surface for permitting lubricant to flow from the first port through the key slot to the second port;
• h) channel means, forming a communication between the first and second ports, for transmitting lubricant between the first and second ports;
• and
• i) a fitting that has an inlet for receiving lubricant, the fitting have a channel for transmitting lubricant to the shaft bore.