Extendible and retractable spa jet

Lang, Harold;

An extendible and retractable spa jet in the retracted position resides in the side wall of a hydrotherapy tub or shower stall and is connected to, and operated by, the existing pressurized water and/or air supply. In the retracted position it serves as a conventional fixed jet. When desired, it may be pulled outwardly from the side wall of the hydrotherapy tub or shower stall and used as a hand-held massage device to achieve concentrated, intensified massaging action at localized areas of the body not possible with fixed spa jets and shower heads.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a top plan view of an extendible and retractable spa jet in accordance with the present invention.

FIG. 2 is a side elevation in cross section of the extendible and retractable spa jet taken along line 2--2 of FIG. 1.

FIG. 3 is a cross section view of the extendible and retractable spa jet taken along line 3--3 of FIG. 1.

FIG. 4 is a side elevation in cross section of the extendible and retractable spa jet taken along line 4--4 of FIG. 1 showing the retractable spring mechanism.

FIG. 5 is a cross section through the center portion of the reel of the extendible and retractable spa jet taken along line 5--5 of FIG. 2 showing the hose connection.

FIG. 6 is a side elevation of the reel of the extendible

and retractable spa jet taken along line 6--6 of FIG. 1 showing the ratchet and pawl latch mechanism.

FIG. 7 is a side elevation showing an extendible and retractable spa jet installed in the wall of a shower or tub and having a shower head type of nozzle.

FIG. 8 is a side elevation showing an extendible and retractable spa jet installed on a shower arm and having a shower head type of nozzle.

DESCRIPTION OF THE PREFERRED EMBODIMENT

The present extendible and retractable spa jet is installed in hydrotherapy tubs of conventional construction with a side wall and a bottom wall and has a plurality of openings in the side wall to receive conventional fluid jet nozzles which communicate with one or more fluid distribution conduits. The hydrotherapy tub includes a water circulation system conventional in the art. The typical hydrotherapy tub or spa water circulation system includes a return line from a drain or outlet of the tub enclosure which leads to a pump. The pump discharge is connected to the water distribution conduit which is in open communication with each of the plurality of conventional jet nozzles. In most conventional spa or tub water circulation systems, air is introduced into the pressure water line prior to the discharge of the water as a jet into the spa. In some systems, air is inducted into the nozzle by the Venturi principle and in other systems, air may be supplied with a blower.

It should be understood that the spa or tub may utilize one or more extendible and retractable jets, as described hereinafter, in combination with conventional fixed jets or may utilize all extendible and retractable jets.

Referring to the drawings by numerals of reference, there is shown in FIGS. 1, 2 and 3, a preferred extendible and retractable spa jet 10 attached to the side wall 11 of a spa or tub such as described above. The extendible and retractable spa jet 10 comprises a hollow, generally cylindrical or disc-like housing 12 having a curved circumferential outer wall 13 and laterally opposed side walls 14A and 14B. A generally cylindrical portion 15 extends outwardly a short distance from the periphery of the housing 12 and defines a cylindrical cavity 16 which extends inwardly from one end and terminates in a back wall 17. An aperture 18 extends through the back wall 17.

As best seen in FIG. 3, for assembly and maintenance, at least one of the side walls 14B may be removably connected to the circumferential wall 13 by screws 19 or other conventional fastening means with a suitable water seal 20 therebetween. Thus, the housing 12 is a water-tight chamber. One of the side walls 14A has an outwardly extending central boss 21 which has a bore 22 therethrough and is provided with internal threads 23 for connecting the housing to the existing water supply and serving as the water inlet.

Similarly, the other side wall 14B has an outwardly extending central boss 24 which has a bore 25 therethrough and is provided with internal threads 26. The boss 24 serves as a air inlet and may be optionally connected to a source of pressurized air, or may be left open for drawing air in from atmosphere, or may simply be plugged or capped, if the jet system does not use air.

The inner surfaces of the side walls 14A and 14B are provided with laterally opposed raised bosses 27 and 28 which extend inwardly in axial alignment. The extended ends of the raised bosses 27 and 28 are configured to receive the hub portion of a reel. As shown in FIG. 3, the raised boss 27 is provided with conical recess, and the raised boss 28 is provided with a conical exterior. A rotary fluid seal 29 is installed in the recess of boss 27 and a rotary fluid seal 30 is installed on the exterior of boss 28.

A spool-like reel 31 is rotatably mounted in the housing 12 between the side walls 14A and 14B. The reel 31 has a central hub portion having a cylindrical wall 32 defining a central chamber 33 in the reel. A pair of parallel radial flanges 34 and 35 are spaced laterally to opposite sides of the reel chamber 33. The outer surfaces of the flanges 34 and 35 are provided with laterally opposed bosses 36 and 37 which extend outwardly in axial alignment. The extended ends of the raised bosses 36 and 37 are rotatably engaged on the raised bosses 27 and 28 of the housing side walls 14A and 14B. As shown in FIG. 3, the raised boss 37 is provided with a conical recess, and the raised boss 38 is provided with a conical exterior. The seals 29 and 30 form a rotary fluid sealing relation with the bosses 36 and 37 of the reel.

A bore 38 extends through the raised boss 36 in axial alignment with the bore 22 allowing water to enter the central chamber 33 of the reel 31. As shown in FIGS. 2 and 5, the side wall 32 of the chamber 33 has a cut-out portion or aperture 39. A generally L-shaped tubular conduit 40 has one end connected to the reel flange 35 and its other end extending into the aperture 39 to form an isolated air passageway through the chamber 33.

A length of flexible hose 41 is secured at one end to the side wall 32 of the reel chamber 33 and covers the aperture 39. The inward end of the hose 41 is sealed closed. As shown in FIGS. 3 and 5, the preferred hose 41 has a generally flat rectangular cross section, and is divided into three separate tubular compartments, similar to a lawn "soaker" hose. The center compartment may carry air, and the two outer compartments carry water. As seen in FIG. 5, the outer compartments of the hose 41 are slotted 42 and the hose is sealed all around the aperture 39, such that water will enter the water compartments of the hose 41 from the chamber 33 via the slots 42. The center compartment of the hose 41 is connected to the extended end of the tubular conduit 40 and sealed around the connection such that air may enter the center compartment of the hose from the air inlet 24.

It should be understood, that the air passageway is an option, and that a hose having only a single compartment may be used to carry water, or that a hose having three compartments each carrying water may be used.

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The hose is wound on itself in convolutions around the chamber wall 32 within the flanges 34 and 35. The outer end of the flexible hose 41 is slidably received through the aperture 18 in the back wall 17 of the cavity 16 of the cylindrical portion 15. The housing 12 is normally installed below the normal water level in a tub or spa, and a seal around the hose aperture 18 is not required. In other words, since the housing is water-tight, water may be allowed to into the housing from the spa or tub.

The reel 31 is disposed relative to the cylindrical portion 15 of the housing such that the outer end (or top convolution) of the flexible hose 41 will spool off the reel 31 and pass through the aperture 18 in a generally axially aligned relation to prevent binding.

As seen in FIG. 4, a coiled spring 43 has one end fixed to the raised boss 37 on the outer side of the radial flange 35 and is loosely wound therearound and the other end o the spring 43 is fixed to the housing side wall 14B. The preferred spring 43 is formed of water resistant material, since the interior of the housing 12 will be substantially filled with water. The spring 43 is wound such that the hose 41 is spring biased in a normally retracted wound position, and when pulled outward will spool off the reel 31 as the reel rotates.

A nozzle 44 is secured to the free end of the hose 41. The nozzle 44 preferably has a flat radial shoulder 45 at its connection with the hose 41 and an exterior configured to be easily gripped by the hand of the user. A bore (not shown) extends through the nozzle 44 in communication with the hose interior compartments. The nozzle 44 is of conventional construction and may be configured internally to expel the water and/or air passing therethrough forcefully in a jet stream of water or a mixture of water and air. The flat shoulder 45 of the nozzle 44, in the retracted position, will engage the back wall 17 to maintain the nozzle within the cavity of the cylindrical portion 15.

A seen in FIGS. 3 and 6, a centrifugal latch mechanism 46 is installed on the reel flange 34 to maintain the nozzle 44 in a selective outwardly extended position. It should be understood that various conventional latching mechanisms may be adapted to control the extended position of the nozzle, and the following description is but one example of a simple ratchet latch mechanism.

The inwardly facing boss 27 on the side wall 14A is provided with a series of radially extending raised protrusions or teeth 47 and serves as a stationary ratchet ring which encircles the water inlet hole 22. The toothed surfaces 47 have flat surfaces 48 on their clockwise side as seen in FIG. 6. A pawl member 49 is pivotally pinned on the outer surface of the reel flange 34 to rotate with the reel 31 as the hose 41 is spooled on and off. The free end of the pawl 49 is shaped to ride on the raised protrusions or teeth 47 of the ratchet ring boss 27 when the reel 31 rotates in one direction (spooling off), and to engage the flat surfaces 48 of the teeth when the reel rotates in the opposite direction (retracting).

When the nozzle 44 is pulled slowly outward from the housing 12, the hose 41 will spool off the reel 31 and gravity drops the free end 49A of the pawl 49 out of engagement with the ratchet ring boss 27 and the free end of the pawl will ride over the teeth 47. When tension on the hose 41 is released, the spring 43 causes the reel 31 to rotate in the opposite direction (retract), and the free end 49A of the pawl 49 will engage the flat surfaces 48 of the teeth 47 to prevent further rotation. When the nozzle 44 is pulled out and quickly released, the free end 49A of the pawl 49 will pivot radially outward and disengage from the ratchet ring teeth 47 due to centrifugal force, thus allowing the hose and nozzle to be fully retracted to its stored position.

Referring again to FIGS. and 2, a trim ring 50 is provided for securing the housing 12 onto the side wall 11 of the tub or spa. The trim ring 50 is a hollow cylindrical member having external threads 51 and a radially extending flange 52 and may or may not have seal element therebetween. The housing 12 is placed on the exterior of the tub enclosure side wall 11 in axial alignment with the existing jet nozzle openings 11A. If nozzle openings do not exist in the side wall 11, then they may be formed therein by conventional methods. The trim ring 50 is threadedly engaged with internal threads 53 on the interior of the housing cylindrical cavity 16 and tightened to engage the trim ring 50 with the interior surface of the tub side wall 11. The water supply inlet 21 is then connected to the existing water discharge conduit of the existing water circulation system.

If air bubbles are desired to create more turbulence, the air inlet boss 24 may be left open to draw air in from atmosphere, or may be connected an existing air source if one exists in the system. If air bubbles are not desired, the air inlet 24 may be plugged or capped.

It should be understood that the air inlet feature is an option, and the present retractable spa jet may be manufactured constructed without the air inlet and passageways, etc., and that a hose having only one compartment may be used to carry water, or that a hose having three compartments each carrying water may be used.

The spa jet 10 may also be used in installations where the housing 12 is not disposed beneath the normal water level, such as on a wall, or in a wall wherein it would not be desirable to allow water to enter the chamber 33. In these types of installations, the air inlet 24 and tubular conduit 40 may be connected to the water supply and water would flow from the source through the inlet 24 and tubular conduit 40 to provide an isolated water flow path through the chamber 33.

As seen in FIG. 7, the housing 12 of the spa jet 10 may be installed in the wall 11B of a shower or tub and have a pulsating or standard shower head type of nozzle 54 installed in place of the spa jet type nozzle 44. In this application, the inlet 24 would be connected to the existing shower outlet fitting of the faucet by a length of conduit whereby the proper mixture of hot and cold water could be selected.

The housing 12 of the spa jet 10 may also be mounted by conventional mounting means to the exterior of the wall of a shower or tub and have a pulsating or standard shower head type of nozzle installed in place of the spa jet type nozzle. In this application, the inlet 24 would be connected to the shower arm pipe by a length of conduit.

As seen in FIG. 8, an adapter conduit 55 may be provided which has one end connected to the inlet 24 on the housing 12 and its other end adapted to be connected to the outer end of the existing shower arm pipe 56.

While this invention has been described fully and completely with special emphasis upon a preferred embodiment, it should be understood that within the scope of the appended claims the invention may be practiced otherwise than as specifically described herein.