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A cleaning head for installation in the bottom surface of a swimming pool includes a rotary pop-up jet producing element having a hollow cylindrical lower section open at its bottom and an enlarged cylindrical hollow upper section closed at its top. An outlet opening is disposed in a vertical cylind

A cleaning head for installation in the bottom surface of a swimming pool includes a rotary pop-up jet producing element having a hollow cylindrical lower section open at its bottom and an enlarged cylindrical hollow upper section closed at its top. An outlet opening is disposed in a vertical cylindrical wall of the upper section. A camming pin extending from the vertical cylindrical wall of the lower section engages opposed, staggered upper and lower saw-tooth-like camming surfaces disposed along an inner cylindrical wall of a stationary section of the cleaning head. The stationary section of the cleaning head sealably engages with a housing installed in the bottom surface of the swimming pool and is sealably coupled to an intermittent high pressure water supply. As the water pressure is intermittently pressurized, the pop-up jet producing element pops up and down, the camming pin engages upper and lower edges of the saw-tooth-like camming elements, causing the rotary pop-up element to rotate intermittently each time the water pressure is turned on and off. Each time the water pressure is turned on, a jet of water is ejected from the outlet opening, which is exposed above the edge of the housing as the pop-up jet producing element pops up. Each time the water pressure is turned off, the jet producing element is retracted into the housing so that the top of the upper section is flush with the bottom of the pool.

대표청구항 ▼

A cleaning head for installation in a receptacle disposed in an under-liquid surface of a liquid container such as a swimming pool, the receptacle receiving liquid, the pressure of which is intermittently or periodically cycled between a relatively low pressure and a relatively high pressure, said c

A cleaning head for installation in a receptacle disposed in an under-liquid surface of a liquid container such as a swimming pool, the receptacle receiving liquid, the pressure of which is intermittently or periodically cycled between a relatively low pressure and a relatively high pressure, said cleaning head comprising in combination: (a) stationary means open at upper and lower ends thereof for removable connection in substantially sealed relation to said receptacle; (b) pop-up jet producing means, having an outlet opening, rotatably, indexably disposed in said stationary means, for moving outwardly from the under-liquid surface in response to said relatively high pressure to expose said outlet opening and produce a concentrated, high velocity liquid jet along said under-liquid surface from said outlet opening; (c) retracting means connected to both said stationary means and said pop-up jet producing means for retracting said pop-up jet producing means when said liquid pressure is cycled from said relatively high pressure to said relatively low pressure, said pop-up jet producing means rotating to following fixed positions in response to said cycling, thereby producing a plurality of successive, concentrated, high velocity liquid jets to clean a circular pattern around said cleaning head, said retracting means including a coil spring for urging said pop-up jet producing means towards its retracted position, said retracting means also including low-friction spring engaging means engaging opposed ends of said coil spring for transmitting opposed forces from said coil spring to said stationary means and said pop-up jet producing means and also effecting sufficiently low-friction rotational engagement between said pop-up jet producing means and said stationary means by said coil spring to avoid substantial winding of said coil spring as said pop-up jet producing means rotates; and (d) first cramming means attached to said stationary means and second camming means attached to said pop-up jet producing means, said first and second camming means engaging each other to cause rotation of said pop-up jet producing means relative to said stationary means each time said pop-up jet producing means moves outwardly from the under-liquid surface in response to said relatively high pressure and/or is retracted by said retracting means.