| 摘要 |
A manually powered swimming pool cover drive for extending and retracting swimming pool covers is described which includes a pair of overrunning, one-way clutch devices journaled around a drive shaft coupled for rotating a swimming pool cover drum for retracting a swimming pool cover and a pair of one-way clutch devices journaled around a drive shaft coupled for rotating a cable reel for extending a swimming pool cover. The respective pairs of overrunning, one-way clutch devices are reciprocated back and forth respectively, manually with long lever handles for rotating the respective drive shafts.
|
