Abstract:
An automated sprayer for spraying walls of a shower or bathing enclosure with a liquid cleanser. A spray head rotates on an essentially vertical axis. Its outlet nozzle pivots on an essentially horizontal axis (but not otherwise) to adjust the vertical angle of the spray, thereby rendering the device adjustable for different size enclosures, and for treating problem stains.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
   Not applicable. 
   STATEMENT OF FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
   Not applicable. 
   BACKGROUND OF THE INVENTION 
   This invention relates to sprayers that are designed to automatically clean shower/bathing enclosures (especially those in residential buildings). More particularly, it relates to rotating sprayers having a nozzle which permits the verticality of the spray direction to be adjusted to account for different size enclosures and hard to clean localized stains. 
   The walls/doors of shower enclosures can become mildewed, coated with soap build up, hard water and/or mineral deposits, or become otherwise soiled, during typical use. Removing these deposits and stains has in the past required one to scrub the walls and doors by hand, particularly if significant amounts of time have passed between cleanings. 
   To assist in this task, cleaning chemicals have been sprayed, squirted, or otherwise applied on the surfaces to be cleaned. The walls are then scrubbed with a cloth, brush, or scrubbing pad, and then rinsed with water. 
   More recently some of these cleaners have been designed so that the amount of scrubbing can be reduced or even eliminated without compromising cleaning, particularly where the cleaners are sprayed on a daily basis. See generally, WO 96/22346 and WO 98/02511. These cleaners are designed so as not to themselves leave spots or other visible stains, even if not rinsed off for hours or days after application. 
   “No scrub” cleaners are preferably applied after the shower has been used. This is accomplished by a consumer keeping a pump spray bottle of the cleanser in or near the shower enclosure, remembering to do the spraying (which may be problematic if the consumer has just woken up), and being willing (or able) to spend the time necessary to spray the enclosure. 
   An alternative no scrub approach is to provide an automated sprayer device for a shower. For example, U.S. patent application publication 2004/0050959 discloses an automated cleansing sprayer that uses an internal pump to spray cleaning fluid from a reservoir out from a rotating nozzle against enclosure walls. One presses an activation button, leaves the shower, and lets the device run through a spraying cycle. There is no need for scrubbing the enclosure walls, or rinsing off the cleaning liquid. 
   However, not all enclosures are of the same size. For example, some shower enclosures are essentially square in top view and relatively small. Some bathing enclosures are elongated rectangular in top view and much larger. A rotating nozzle configured to clean a small shower may not direct cleaning liquid to all of the desired portions of a larger bathing enclosure. 
   To address that concern, one might use multiple nozzle holes to spread the spray more widely, or configure the device at a compromise setting half-way between optimized settings for the largest and smallest expected enclosures. However, either such approach might require extra cleaning liquid to achieve the desired cleaning. 
   Further, where such devices are first installed after an enclosure has already become heavily stained in a localized manner, there is a desire to use extra cleaner on the most stained area. However, such devices are designed to spray in a more uniform manner as a general rule. This may lead a consumer to use extra cycles of the device to achieve cleaning, and/or a consumer becoming dissatisfied with the cleaning performance. 
   In unrelated work U.S. Pat. Nos. 5,992,404, 5,536,200 and 5,248,094 showed various structures for pointing nozzles. However, these systems were not easily adaptable to the present environment. For example, the use of a universal nozzle joint in the context of the present device would be unsuitable as rotational forces would be likely to drive the nozzle out of the selected position. 
   Hence, a need still exists for improved automated shower cleaners, particularly with respect to capability of adjusting for different size enclosures and providing for localized stain treatment capability. 
   SUMMARY OF THE INVENTION 
   In one aspect the invention provides an automated sprayer for spraying an enclosure with a liquid cleanser. There is a spray head having an outlet through which cleanser can be expelled during operation of the sprayer (if the sprayer is linked to a supply of such liquid cleanser). There is also a nozzle positioned on the outlet, and a motor for rotating the spray head (preferably around an essentially vertical axis). 
   The vertical position of the nozzle is capable of being manually adjusted to adjust where the liquid cleanser is directed by the sprayer. For example, the nozzle may be capable of being manually pivoted relative to the spray head to adjust an angle at which the liquid cleanser is directed during operation of the sprayer (when the sprayer is linked to a supply of such liquid cleanser). The nozzle connection is sufficiently stable so that mere rotation of the spray head won&#39;t dislodge the angle. 
   In some preferred forms the outlet is linked to a first tube, and the nozzle is in the form of a second tube linked to the first tube along an essentially horizontal pivot axis. Most preferably the nozzle is not capable of being universally pivoted relative to the first tube, or capable of being pivoted in a direction of rotation of the spray head. 
   The nozzle can be manually pivoted relative to the spray head to adjust the angle at which the liquid cleanser is directed during operation by up to at least 90 degrees, preferably by up to at least 120 degrees, even more preferably by up to at least 160 degrees, most preferably by about 180 degrees. 
   In an alternative form the nozzle has a nipple attached directly to the outlet. Here the pivoting of the nipple is enabled within the spray head, preferably by a joint upstream of the outlet. 
   Alternatively, the nozzle&#39;s vertical position could be manually adjusted by other means. For example, the entire turret could be linked by a ratchet or other connection permitting it to be pushed towards or away from the main sprayer body, while still permitting it to rotate. 
   Note that by “manual” we are preferring something that can be achieved without the use of tools to make the adjustment, but are not excluding the possibility of an adjustment system that can use a screw driver or other manual tool to facilitate the adjustment. 
   For small enclosures the nozzle won&#39;t usually be positioned/pointed as much upward as for larger ones (absent a localized stain to be cleaned). In this regard, for larger enclosures one typically wants a more vertical spray direction so as to be able to provide adequate spray at even the upper parts of the farthest away walls. A consumer that wants to install such a device in their enclosure would assess generally its dimensions, take into account the location of the best mounting position (e.g. the shower outlet pipe), and then angle the nozzle to optimize spraying (likely taking into account package recommendations). 
   If a consumer instead wants to begin use of the sprayer on an enclosure already heavily stained at localized positions, and wants to direct extra cleaning effort at those positions, the initial directional and vertical position setting can take that into account. Then, when that stain is adequately addressed, the setting can be optimized for a more uniform treatment optimized for that enclosure. 
   These adjustability advantages can be achieved at low additional cost. Further, this type of adjustment mechanism can even be retrofit on certain existing devices of this type. 
   These and other advantages of the invention will be apparent from the detailed description which follows and the drawings. It should be appreciated that what follows is merely a description of preferred embodiments. That description is not meant as a limitation of the full scope of the claims. Rather, the claims should be looked to in order to judge the full scope of the invention. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a perspective view of a preferred embodiment of an automated sprayer of the present invention; 
       FIG. 2  is an enlarged perspective view of the lower portion of the sprayer focusing on a manually-adjustable nozzle; 
       FIG. 3  is another perspective view of the manually-adjustable nozzle, with altered orientation; 
       FIG. 4  is a partial, largely schematic, side view of that sprayer; 
       FIG. 5  is a cross-sectional view taken along line  5 - 5  of  FIG. 2 ; and 
       FIG. 6  is a perspective view of an alternate embodiment. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   The sprayer  10  includes a bottle  12  containing a supply of cleaning liquid, a housing  14  with an adjustable hanger  26 , and a rotatable spray head  32  having a manually-adjustable nozzle  20 . Alternatively, a fixed wire hanger may be used for mounting purposes. 
   Apart from the portion shown in  FIG. 3  the device is essentially based on devices of the type depicted in U.S. patent application publication 2004/0050959, which is incorporated by reference as if fully set forth herein. These devices are provided with an internal replaceable battery that provides power to a motor. The motor drives both a pump and a rotating drive for the spray head. 
   The pump delivers cleaning liquid from the bottle  12  to the spray head  32 . The sprayer  10  is typically suspended from a shower pipe or the like. Thus, it does not require room electrical power, or a connection to the room water supply. 
   Once activated by pressing button  35 , an internal computer controller delays a spraying cycle for a short period, allowing the consumer to exit the shower. The spray cycle then begins and ends automatically (e.g. one minute of rotational spraying). The cycle is preferably initiated immediately after a consumer finishes a shower and is about to leave the shower. Hence, there is no rinsing in a typical application, at least not until the next time the shower is normally used. 
   As shown in  FIG. 5  an outlet  202  is provided on the rotatable spray head  32 . Upstream of outlet  202  may be positioned a fluidic pulsing device with a housing  208 , an inlet  210  and a feed tube  216  leading from a pump (not shown). 
   The outlet  202  is connected to a first tube  203  which then connects to nozzle  20 . Nozzle  20  comprises a turret  22  having side arms  40  holding an axle  41  that pins a second tube/nipple  23 . The axle  41  may be short projections from each side of tube  23  that snap into accommodating recesses on the arms  40 . Alternatively, it may be a through axle that passes through the arms and the tube  23 . 
   In any event, the idea is to allow the second tube  23  to pivot relative to the first tube  203  between the arms  40 . This can be achieved without losing fluid communication because the inner termini of the tubes  23 / 203  can both lead into an enlarged pocket defined between arms  40 , with the termini spaced enough from each other to allow the pivoting. 
   The arms  40  can frictionally engage the second tube  23  to permit the desired angle adjustment, but still resist unintended adjustment due to gravity or rotational forces. If desired, ratchet structures can be provided between the internal surfaces of the arms  40  and corresponding projections can be provided on second tube  23  to interact with those ratchet structures, to further insure desired angular settings. 
   The sprayer  10  may be hung so that its outlet  202  extends downwardly at approximately a 30 degree angle. As seen in  FIG. 4 , the second tube/nipple  23  is adjustable along about a 180 degree range extending there from. This permits a spray that can arc across to a far away wall, as well as permit the wall from which the shower head is mounted to be adequately cleaned if it has a localized stain. 
   Most preferably, the arms  40  provide a vertical slot that inhibits undesired angling of the nozzle  23  in the direction that the spray head rotates. The arms thus resist rotational forces. 
   In an alternate embodiment, as seen in  FIG. 7 , similar parts are designated with similar numbers, albeit with a designation A as well. For this embodiment, the main difference is that angular adjustment occurs at a joint mostly within spray head  32 A, such as by a joint upstream of outlet  202 . 
   In a further embodiment, rather than making the adjustment by a pivoting, one could have the turret  22  mounted so that it is vertically adjustable as a whole within the supporting structure  202  and suitable to be fixed at specified vertical positions. That would achieve some manual adjustment, albeit derived from verticality alone, rather than angular direction. 
   In yet another embodiment, both the pivotal adjustment and the vertical adjustment of the prior paragraph could be incorporated. This could provide greater flexibility. For example, in a small enclosure with a lower stain one might want to direct the nozzle down without raising the turret. In a large enclosure with a lower stain one might want to direct the nozzle down while also raising the turret. 
   Preferred embodiments of the invention have been described above. However, modifications and variations to the preferred embodiments will be apparent to those skilled in the art from this disclosure, which will be within the spirit and scope of the invention. 
   Therefore, the invention should not be limited to just the described embodiments. To ascertain the full scope of the invention, reference should be made to the following claims. 
   INDUSTRIAL APPLICABILITY 
   The invention provides a sprayer for automatically spraying the walls of shower enclosures or the like, where the sprayer can be optimized for use with different size enclosures.