| 摘要 |
A portable, motorized chain driver for lifting and lowering loads by attaching the chain driver to a manual chain hoist for driving the chain. The chain driver comprises a chain and rotor housing attached to a compact electrical or gas driver unit with an angled head, a gear reduction and a handle with direction and speed controls. The chain and rotor housing comprises two halves which include integral chain guides, a central rotor and clutch area and a drive source mount. The chain driver is particularly useful for driving manual chain driven hoists and garage doors.
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