Four-wheel-drive automatic swimming pool cleaner

Details Four-wheel-drive automatic swimming pool cleaner Four-wheel-drive automatic swimming pool cleaner

2005-02-15

2005-02-15

Warden, Sr., Robert J. (Department: 1744)

Brushing, scrubbing, and general cleaning

Submerged cleaners with ambient flow guides

Reexamination Certificate

active

06854148

ABSTRACT:
A four-wheel pool cleaner (20) motivated by water flow to move along a pool surface, and having: a body (24); the four wheels rotatably mounted thereon and including two sets of two wheels (22) each, one wheel of each set on each side; a drive mechanism (36) in position to be moved by water flow and having a rotatable drive member (76); a drive train extending to the first wheel set (22a, b) and to the second wheel set (22c, d), to drive all four wheels. Preferred embodiments include: wheel-to-wheel drive links (88) along the side; a turbine (36) as drive mechanism; a pair of spaced wheelgears (32, 34), preferably integrally formed with the wheel, facilitating drive linkages and steering; a pair of end-to-end drive shafts (80, 82) joined by a coupler (84c), one shaft end (80a) being a ball joint allowing fore-and-aft movement of a drive-shaft distal end; a spring (102) and cam (100) for alternately moving that distal end between a driving position engaging one of the spaced wheelgears (32), and a steering position engaging the other of the spaced wheelgears (34); wheel treads (108) with radial fingers (110), some (110a-c) of longer length; and a segmented articulated skirt (56) to help enclose a plenum beneath the pool cleaner.

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patent: 0 323 883 (1989-01-01), None
patent: 0 565 226 (1993-02-01), None
patent: WO 0192664 (2001-12-01), None

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