US 4,535,937 AGranted

Graded actuation of hydraulically actuated pool cleaning heads

OwnerJoseph H. Fagan, Paul J. Pristoinventors

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Abstract

A hydraulically actuated device is employed as part of a pool cleaning system. An improved structure assembly of a hydraulically actuated core within a housing provides ease of manufacture and assembly. Graded control of the application of pressure and the flow of fluid through the system is provided so that the hydraulic device is actuated in a relatively gradual and graded manner to overcome the deleterious effects of abrupt actuation of such devices and the resultant water hammer, pressure surges which are generated in such abruptly operated systems. Improved jet orifices enclosed within the hydraulically actuated cylinder of the device provide for more efficient disturbance of sediments on the interior surfaces of the pool in the immediate vicinities of the hydraulically actuated devices. Graded control of fluid flow and the sequential actuating of selected hydraulically controlled devices is provided in a manner which ensures that a constant rate of fluid flow through the system is maintained at all times.

Claims16

Dependent claims

Hydraulically actuated core means captively ejectable from its housing upon application of hydraulic force comprising:

cylindrical housing means having first and second open ends, first diameter-reducing shoulder means adjacent said first open end, second diameter-reducing shoulder means at a selected position between said first and second open ends, diametrically opposed egress means interrupting said first diameter-reducing internal shoulder means;
annular weighting means insertable within said cylindrical housing means via said egress means and positionable thereafter within said housing means with its transverse axis orthogonal to the longitudinal axis of said housing means and reciprocal therein within limits defined by said first and said second diameter-reducing shoulder means;
cylindrical core means insertable within said first open end of said cylindrical housing means and reciprocal therein and having a top end and a bottom end said top end lying at a selected position with respect to said first open end of said housing means when said bottom end is in contact with said annular weighting means and said annular weighting means is in contact with said second diameter-reducing shoulder;
and
means for coupling said cylindrical core means to said annular weighting means after both have been positioned within said cylindrical housing.

2 more elements

Dependencies are inferred from the claim text.