REFERENCE TO PROVISIONAL APPLICATION This application is based on, claims priority to, and hereby refers to U.S. Provisional Patent Application Serial No. 61/188,414, filed August 8, 2008, having the same title as appears above, the entire contents of which are incorporated herein by this reference.

FIELD OF THE INVENTION

This invention relates to fluid treatment devices and more particularly, although not necessarily exclusively, to chlorinators for circulating water used in swimming pools, spas, hot tubs, or other water-containing vessels.

BACKGROUND OF THE INVENTION

U.S. Patent No. 6,680,026 to Denkewicz, et al., discloses water-purification equipment useful especially in connection with swimming pools, spas, and hot tubs, where water recirculates. The equipment may provide "plug-in" forms of fluid-flow diverters "designed to penetrate, or fill, openings intermediate remote ends of conduits." See Denkewitz, col. 2, 11. 3-4. As indicated in the Denkewicz patent:

Embodiments of the invention contemplate diverting flowing fluid to purification equipment formed about or otherwise connected to such diverters, permitting diverted water to be purified before rejoining the flow. The . . . circulating nature of the water permits more of its volume ultimately to be diverted into the equipment for purification. See kL, H- 13-15.

Positioned within the equipment of the Denkewicz patent is water purification media such as "mineral-based pellets or other objects of silver-, zinc-, or copper-containing material." However, other media alternatively may be used therein. According to the Denkewicz patent, "[c]hlorine or other chemicals which may be dissolved or contacted by the water being diverted are among suitable alternatives." See id., 11. 57-59. International (Patent) Publication No. WO 2006/110799 of Kennnedy, et al. [sic Kennedy, et al.] details additional equipment used to divert flowing fluid for purification. Diverted fluid may be treated by, for example, a salt water chlorinator (SWC) having an electrolytic cell. Treated water is then returned to the main flow stream via a series of fins, with the overall configuration of the equipment being designed to, among other things, cause the bulk of fluid experiencing pressure spikes to remain in the conduit. See, e^, Kennedy, p. 12, 11. 4-10. Accordingly, housings detailed in the Kennedy publication may be "fabricated from less pressure-resistant materials, and need not be engineered in the same way as other pressure vessels." See id., 11. 13-14. The contents of the Denkewicz patent and the Kennedy publication are hereby incorporated herein in their entireties by this reference.

SUMMARY OF THE INVENTION

The present invention provides additional equipment in the style of the diverters of the Denkewicz patent and the Kenney publication. Intended mainly for use as chlorinators, devices of the invention may divert water flowing in conduits into the devices for treatment and subsequent return to the flow stream. Separate, spaced inlet and return tubes may be utilized within the conduits. The return tube of the device additionally may be designed to create vortex action, using a pressure differential to evacuate treated water from the device back into the conduit.

Additional features of the invention may include a housing, upper and lower sections of a clamp, and a threaded locking collar. The sections preferably are snap-fit together about a conduit, with the locking collar thereafter engaging the lower section to enhance a fluid seal. By permitting the sections to connect via snap-fitting, the invention avoids any need to utilize secondary fasteners.

Another optional feature of the invention is inclusion of an adaptor sleeve. The sleeve especially is useful when the main conduit to which the device is to be connected is smaller than a nominal diameter. In these instances, the sleeve may be positioned between the upper and lower housing sections to reduce the spacing between the two. Finally, gas removal from the housing also may occur.

It thus is an optional, non-exclusive object of the present invention to provide innovative fluid treatment devices. It is, moreover, an optional, non-exclusive object of the present invention to provide "plug-in" types of equipment particular useful for treating circulating water.

It is a further optional, non-exclusive object of the present invention to provide fluid treatment devices in which a return tube creates vortex action to evacuate treated fluid from the devices and into conduits.

It is also optional, non-exclusive object of the present invention to provide fluid treatment devices in which conduit clamps do not require secondary fasteners.

It is another an optional, non-exclusive object of the present invention to provide fluid treatment devices in which a locking collar may be used to enhance the integrity of a fluid seal between the clamp and the conduit.

It is, furthermore, an optional, non-exclusive object of the present invention to provide fluid treatment devices in which an adaptor sleeve may facilitate accommodating smaller conduits when the devices are attached.

Other objects, features, and advantages of the present invention will be apparent to those skilled in the relevant fields with reference to the remaining text and the drawings of this application.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. IA- IB are elevational views of exemplary equipment of the present invention.

FIG. 2 is a cross-sectional view of the equipment of FIGS. 1A-1B.

FIG. 3 is an exploded view of portions of the equipment of FIGS. IA- IB shown in connection with a fluid conduit to which the equipment may attach.

FIG. 4 is another exploded view of portions of the equipment of FIGS. IA- IB shown in connection with the fluid conduit of FIG. 3.

FIG. 5 A is an isometric, bird's-eye view of an upper housing section of the equipment of FIGS. IA- IB.

FIG 5B is an isometric, worm's-eye view of an upper housing section of the equipment of FIGS. 1A-1B. DETAILED DESCRIPTION

Depicted in FIGS. 1A-2 is exemplary equipment 10 of the present invention. Equipment 10 preferably constitutes a fluid treatment device. Also illustrated in FIGS. 3-4 is conduit C to which equipment 10 may attach. Conduit C preferably conveys liquid from one location to another. Even more preferably, conduit C conveys water circulating to or from a swimming pool, spa, hot tub, or similar vessel.

Illustrated in FIGS. 1A-1B and various of FIGS. 3-5B are components of equipment 10 including housing 14, locking object in the exemplary form of collar 18, and clamp 22. Clamp 22 may comprise upper section 26 and lower section 30 and is designed to encircle, or otherwise surround, a portion of conduit C. Further, upper section 26 is configured to communicate with (i.e. plug-into) conduit C to permit fluid to flow thereto and therefrom. FIG. IB depicts inlet 34 through which fluid may flow from conduit C into housing 14 via upper section 26.

Additionally shown in FIGS. 3-4 is optional sleeve adaptor 38 as well as seal 42, o-ring 46, and outlet 50. Sleeve adaptor 38, if present, may be generally semi- cylindrically shaped and configured to nest in a similarly- shaped portion of lower section 30. Adaptor 38 is, in essence, a spacer, intended to fill any gap between conduit C and lower section 30 when the two are attached. Use of adaptor 38 renders equipment 10 more versatile, as it may accommodate conduit C of different diameters.

Seal 42 and o-ring 46 prevent, or at least reduce, fluid leakage between and from conduit C and equipment 10. Seal 42 preferably is an elongated object with concave lower surface 54 contacting outer surface 58 of conduit C. Seal 42 additionally may include two spaced openings 62 and 66, the former receiving inlet 34 and the latter receiving outlet 50. O-ring 46, by contrast, beneficially fits between locking collar 18 and upper section 26.

As depicted especially in FIG. 5B, spaced inlet 34 and outlet 50 preferably are generally tubular in shape and integral with upper section 26. They need not necessarily be so shaped or integrally formed with upper section 26, however. Instead, for example, inlet 34 and outlet 50 could engage or otherwise connect to corresponding portions of section 26. To employ equipment 10, conduit C must include an opening in its upper wall. Such opening may be drilled or created in any other appropriate way. Advantageously, conduit C will include two openings, with the openings spaced and sized similar to spacing and sizing of inlet 34 and outlet 50 as well as spacing and sizing of openings 62 and 66 of seal 42. Although not presently preferred, conduit C could, for example, include only one opening shaped and sized similar to seal 42.

Lower section 30 may then be placed underneath conduit C with its saddle portion 70 opposite the upper wall openings of conduit C. (As noted earlier, adaptor 38 optionally may be employed as a spacer between conduit C and lower section 30.) Seal 42, by contrast, may be positioned in contact with the upper wall of conduit C so that fluid may communicate between the conduit C and openings 62 and 66. Upper section 26 may be positioned atop seal 42 so that inlet 34 extends into conduit C through opening 62 and outlet 50 extends into conduit C through opening 66. Upper section 26 beneficially includes one or more tabs 74 designed to engage apertures 78 of lower section 30 so as to connect (e.g. snap-fit) upper section 26 to lower section 30 about conduit C. Doing so forms clamp 22 and helps compress seal 42 against conduit C.

As shown in FIG. 5A, upper section 26 may include channel 82 in which o- ring 46 may be placed. Thereafter, internally-threaded collar 18 may engage threads 86 of saddle portion 70 of lower section 30 so as to draw it toward upper section 26 as collar 18 rotates, further facilitating sealing of equipment 10 about conduit C. Collar 18 also connects housing 14 to upper section 26 as detailed in FIGS. 2 and 4. Persons skilled in the art will recognize that collar 18 may engage lower section 30 other than via threads, and that collar 18 need not necessarily be an object distinct from, for example, housing 14.

Upper section 26 further may include baffle 90 positioned between inlet 34 and outlet 50. Baffle 90 assists in preventing fluid entering housing 14 via inlet 34 from immediately exiting the housing 14 via outlet 50. Although baffle 90 need not necessarily be present as part of upper section 26, its presence currently is preferred.

Once connected about conduit C, equipment 10 may function to sanitize, purify, or otherwise treat fluid (such as water) travelling through the conduit C. In use, pressurized fluid flows though conduit C in the direction of arrows A. As it does so, the fluid encounters inlet 34, with the pressure driving some of the fluid into the inlet 34 (while the remaining fluid continues to travel within conduit C). As depicted especially in FIGS. IB, 2-3, and 5B, inlet 34 may include tapered end 92 whose trailing edge 93 extends farthest into conduit C. End 92 thus presents an open face to the flowing fluid, facilitating its entry into inlet 34. From inlet 34, fluid may then enter housing 14 in which treatment may occur.

Indeed, housing 14 may perform any desired type of fluid treatment. Preferably, however, housing 14 includes therein chlorinator 94, which more preferably is an SWC. Through operation of chlorinator 94, chlorine is added to water entering housing 14 via inlet 34 (i.e. hypochlorous acid is formed) before the water exits the housing 14 via outlet 50 to return to conduit C.

Illustrated in FIG. 2 using arrows B, D, and E is the major flow path of fluid within housing 14. As depicted, fluid flows initially upward, in the direction of arrows B (which is generally perpendicular to arrows A), through plates 98 of chlorinator 94. Under force of gravity, the fluid then travels generally in the direction of arrow D before flowing downward in the direction of arrows E. Note that some fluid flowing in the direction of arrows C is likely to travel again through plates 98, whereas other fluid is not. Regardless, however, all fluid flowing in the direction of arrows E may be received by outlet 50 for return to conduit C.

Produced additionally by salt-water chlorination is hydrogen (and other) gas, which beneficially may be introduced into the circulating water to avoid its undesired build-up within housing 14. Chlorinator 94 thus may include gas tube 102 extending from within housing 14 into outlet 50. Via tube 102 and outlet 50, gas such as hydrogen may be entrained with treated water exiting housing 14 and re-entering conduit C. Tube 102 additionally may function to bleed air from housing 14 and, if desired, may be conjoined with outlet 50 in a single part.

Similar to inlet 34, outlet 50 may include a tapered end 106 extending into conduit C. Unlike end 92 of inlet 34, however, end 106 opens opposite to the direction of fluid flow within the conduit C so as to present a closed face thereto. Stated differently, end 106 opens opposite the direction indicated by arrows A, with its leading edge 110 extending farthest into conduit C. This configuration of end 106 allows the flowing fluid to create a lower-pressure area within outlet 50, creating vortex action facilitating removal of treated water from housing 14. Selecting a lesser diameter for tube 102 than for outlet 50 enhances ability of the lower-pressure region to remove gas from housing 14 too.

The foregoing is provided for purposes of illustrating, explaining, and describing embodiments of the present invention. Modifications and adaptations to these embodiments will be apparent to those skilled in the art and may be made without departing from the scope or spirit of the invention.