Back to results
US 5,327,590 AGranted
Automatic swimming pool cover with a dual hydraulic drive system
OwnerHarry J. Lastinventor
Life of this patent
Estimating the term…
Abstract
A hydraulic drive system is described for automatic swimming pool cover systems in which a hydraulic drive provides torque for both resisting cover drum rotation during cover extension across the pool and rotating the cover drum for cover retraction, while a separate second hydraulic drive provides torque for both rotating the cable reels for cover extension and resisting cable reel rotation during cover retraction.
Claims15
A hydraulic drive system for extending and retracting swimming pool covers comprising, in combination,
- a first reversible hydraulic motor having a drive mechanically coupled for rotating at least one cable reel around which a pair of cables, each coupled to a front side edge of a pool cover, wind and unwind,
- a second reversible hydraulic motor having a drive mechanically coupled for rotating a cover drum around which the pool cover winds and unwinds,
- a hydraulic liquid,
- a means for pressurizing and circulating the hydraulic liquid through hydraulically coupled elements of the drive system, and
- means hydraulically coupling the respective motors and the means for pressurizing and circulating the hydraulic liquid for:
- (i) providing a driving torque, via the first motor, for rotating the cable reel to wind the cables around the reel while simultaneously providing a resistive torque, via the second motor, for resisting unwinding rotation of the cover drum as the cover unwinds and is drawn across covering the pool;
- and
- (ii) providing a driving torque, via the second motor for rotating the cover drum to wind the cover around the cover drum, while simultaneously providing a resistive torque, via the first motor, for resisting unwinding rotation of the cable reels to tension the cables and cover as the cover retracts uncovering the pool.
5 more elements
Dependencies are inferred from the claim text.