Method for operating a pop-up cleaning nozzle for a pool or spa
View Patent ↗A recessed incrementally rotating nozzle assembly is located in a wall or bottom surface of a swimming pool in fluid communication through a conduit with a source of water under pressure from a valve, which valve periodically releases water into the conduit. Each time water flows, a nozzle housing is raised to eject a stream of water. As the nozzle housing rises, it is incrementally rotated by a pin engaging a saw tooth member of a cam ring. Upon cessation of flow, the nozzle housing is retracted and during retraction the nozzle housing is further incrementally rotated by the pin engaging another saw tooth member of the cam ring. After a predetermined degree of angular rotation, a cam reverser slidably reorients protrusions guiding the pin into and out of the saw tooth members to cause the pin to be guided by the opposite side of the saw tooth members and thereby cause reversal of the direction of rotation of the nozzle housing. After the predetermined degree of rotation in the reverse direction has occurred, the direction of rotation is again reversed by the cam reverser. The angle through which rotation occurs is readily adjusted by substituting an appropriately configured pattern cam. The fan of water streams ejected may be readily reoriented to correspond with an area of interest by unlocking the position of a cam ring, angularly reorienting the cam ring and locking it in its new position.
1. A method of cleaning a swimming pool, the method comprising:
providing a cam operated swimming pool cleaning head and nozzle assembly comprising at least a first and a second saw tooth member within the assembly, each saw tooth member comprising a first side and an opposite side;
vertically translating the nozzle upward and simultaneously incrementally rotating the nozzle clockwise to an extended position in response to application of water pressure within the nozzle, the nozzle being guided in its incremental rotation by the first side of the first saw tooth member;
ejecting a stream of water through an outlet of the nozzle and directing the stream to a surface of the swimming pool when the nozzle is in the extended position;
vertically translating the nozzle downward and simultaneously incrementally rotating the nozzle clockwise from the extended position to a retracted position in response to cessation of the water pressure within the nozzle, the nozzle being guided in its incremental rotation by the first side of the second saw tooth member;
incrementally rotating the nozzle in steps through a predetermined number of degrees each time the nozzle is vertically translated until a predetermined degree of angular rotation is reached;
repositioning a cam reverser operatively associated with the nozzle when the nozzle is vertically translating;
vertically translating the nozzle downward from the extended position to the retracted position and simultaneously incrementally rotating the nozzle counter-clockwise after the cam reverser is repositioned and in response to cessation of the water pressure within the nozzle, the nozzle being guided in its incremental rotation by the opposite side of the second saw tooth member; and
vertically translating the nozzle upward to the extended position and simultaneously incrementally rotating the nozzle counter-clockwise in response to application of water pressure within the nozzle, the nozzle being guided in its incremental rotation by the opposite side of the first saw tooth member.