The present invention relates to pole caddies, namely devices for holding items within a domestic shower enclosure having one or more shelves supported off a vertical pole.
A wide variety of shower caddies are known. There are two essential types of shower caddies: hanging caddies and pole caddies. The present application is concerned with the latter. A typical pole caddy comprises one or more shelves which are cantilevered from a single vertical pole which typically is positioned in the corner of a bathtub enclosure. Often, the pole is spring loaded and compressed between the ceiling and a lower surface such as the tub rim. Examples of some pole caddies can be seen in U.S. Patents as follows: Lindo No. D635,807; Hofman et al. No Des. 417,991; Yang et al. 8,763,821; and Yang et al. D569,148.
Shelves of pole caddies most often have a nominally pie shape or triangle shape, with sides running parallel to the walls of a right angle corner. Typically, shelves are cantilevered from a slidable collar which is screwed locked or otherwise fastened to the pole at a chosen elevation.
The typical wire basket type construction of shower caddies makes them difficult to clean, for example, to remove soap and scum. When a shelf can be removed from the pole that makes cleaning easier. A shelf that is permanently attached to a collar can only be removed by taking down the pole and sliding the collar off the end of the pole, which is inconvenient.
There is a need for a better way of holding a collar in place and enabling convenient change in elevation from time to time. Use of a screw or other fastener to hold a collar in place may necessitate the use of a tool (which can be misplaced). And a screw may mar the pole surface, disrupting surface finish and inducing corrosion or causing unsightly appearance when a collar elevation is changed. Alternatively, having a pole with plurality of vertical holes or depressions which receive a fastener can increase cost and make maintaining cleanliness harder.
An object of the invention is to provide a pole caddy which has shelves that have improved ease of adjustability. A further object is that such a pole caddy has shelves that can be readily removed for cleaning. A still further object is that the pole caddy be economic to manufacture and ship.
An object of the invention is to provide a pole caddy which has shelves that have improved ease of adjustability. A further object is that such a pole caddy has shelves that can be readily removed for cleaning. A still further object is that the pole caddy be economic to manufacture and ship.
In accord with the invention, an embodiment of pole caddy comprises a vertical pole, at least one collar, and at least one shelf removably or permanently attached to the collar. The pole slidably fits within a central hole of the collar and the shelf cantilevers from the collar. Preferably, the shelf is made of welded wire and has tangs that set within holes in the top of the collar body; such attachment permits the shelf to pivot about the collar a in cantilever fashion small amount. A brace helps support the weight of the shelf and any objects carried by the shelf by releasably pressing against a tab which extends downwardly from the body of the collar. The tab has a contact portion, for example an elastomer pad, which is pressed against the pole by the brace due to the weight of the shelf and any load on the shelf, creating frictional force which holds the collar and thus the shelf at a desired elevation. Preferably, the tab has a step on its exterior surface to engage the brace. When a user lifts the shelf manually upward relative to the collar, the frictional force of the tab is relieved and the elevation of the clamp can be adjusted. Typically, there are several such collars and shelves on a single pole.
When the shelf is made of metal wire, the shelf preferably comprises one or more rails which define the periphery of the shelf, which when looked down on has a “pie shape”—characterized by two diverging straight sides and an arcuate outermost rim, suitable for the pole being positioned in a corner. In an embodiment, there is at least a first rail and the brace comprises spaced apart drop-down portions of the first rail and a rest-connector running between the drop-down portions. In a variation, there is a second rail at an elevation higher than the first rail, and the tangs are terminal portions of the ends of the first rail that are nearest the pole.
Preferably, the contact portion of the first tab extends circumferentially from ⅛ to ¼ of the way around the exterior of the pole. Optionally, a collar comprises a second tab that extends upwardly, to add lengthwise stability to the collar. There typically are several like collars and shelves on a pole.
The invention provides a pole caddy which is economical you make and has shelves that are easy to adjust and easy to remove and clean.
The present invention has relation to commonly owned U.S. Pat. No. 9,357,860 of Jeffery Klowan, the disclosure of which is hereby incorporated by reference. In this description a pole caddy, also called a pole caddy assembly, comprises the combination of pole, collar, and shelf. The present invention is described in terms of a preferred pole caddy having shelves made of welded and plated steel wire, alternatively another metal. A collar of the present invention is preferably made of injection molded plastic, more preferably ABS thermoplastic. Alternatively, plastic, metal, and ceramic materials may be used.
For simplicity of illustration, only one exemplary shelf is shown in the Figures other than
Pole caddy 40 of
As seen in
Shelf 142 has a construction much like that of shelf 42. The shelf has two diverging sides that run out nominally radially from the pole. Upper rail 148 defines the outer bound of the essential shelf which has the shape of a “piece of pie” when looking down. Shelf 142 comprises U shape ribs 156, the lengths of which run outwardly from the collar location. As best seen in
With reference particularly to
Near the collar and pole, rail 122 transitions to spaced part drop-down portions 155, which run vertically down to horizontal rest 151. The combination of drop-down portions 155 and the connecting rest 151 comprise brace 157 which contacts a lower portion of the collar. In the generality of the invention, braces for shelves which are made of wire may be constructed differently. In combination with the tangs 154, brace 157 provides support to hold the shelf in its horizontal cantilever orientation. And as discussed below the force of the brace against the collar has utility in keeping the collar at a desired elevation.
With reference particularly to
With reference particularly to
When a shelf is positioned at a desired elevation, the tab is releasably pressed against the pole, to hold the collar and shelf at a desired elevation, as follows. With reference to
With reference to
The force represented by vector S is resisted by the collar top surface support of the rails 148 proximate the tang-ends and by the support of brace 157 on step 136 of tab 126. The collar resists the shear force S due to its friction engagement with the pole, which is produced as a result bending force M2 being applied to the tab of the collar.
Through rest-connector 151 (i.e., brace 157) force M2 applies load in a nominally horizontal direction to the tab 126. The force thus increases frictional engagement of the contact portion 132 and the surface of the pole. Routine engineering may be used in dimensioning a pole caddy assembly as just described; and when that is done the result is that there will be frictional engagement of the collar with the pole due to the weight of an empty shelf, sufficient to hold the collar vertically in position, resisting vertical downward force S on the collar. The more weight of items a user places on the shelf, the more the frictional force between the tab of the collar and the pole is increased, to resist the tendency of the collar to move downward. The smaller the distance between the location where the brace applies force and the attachment of the shelf to the upper end of the collar, the greater will be the force M2 for any given weight or load of a shelf.
From the foregoing, it will be understood that it is desirable that there will be a substantial force (M2) applied to the lower tab by weight of the shelf and any objects carried by it. When a shelf is constructed of about 0.2 inch diameter steel wire with engagement of tangs 154, as previously described, the nature and flexibility of the tangs and contiguous rail portions allows a wire shelf to pivot at least a small amount downwardly and upwardly relative to (the top of) the collar body to enable force M2 to be applied to the tab, as described above. Should a shelf be constructed differently in accord with the invention, the designer will ensure that the attachment of the cantilevered shelf to the collar in proximity to the top of the collar allows the shelf to pivot down (and then up, to release the tab-force) at least a small amount. Thus a brace can apply force to the tab, varying according to the load which is carried by the shelf, compared to having an upper end attachment that is so stiff and inflexible as to not allow the brace to apply load. While the term “pivot” is used herein with respect to the shelf's slight cantilever movement, within that term is comprehended bending, as can be the case where there are tang connections. When there is no load on the shelf, the design is of such a nature that the weight of the shelf applies force to the tab sufficient to keep the unloaded shelf at a fixed elevation. Optionally a preload may be built into the attachment and or tab. Reasonable experiment will enable carrying out the invention.
Should a user of a pole assembly desire to change the elevation of a shelf by moving the collar up or down, the user may apply upward or lifting force to the shelf, to reduce the force S, which thereby also lessens the force M2 applied by the brace. Thus, the frictional engagement of the contact portion 132 with the pole surface will be reduced, preferably to near zero. While doing that, the user grasps the collar, with the convenient option of grasping the flats 134, and slides the collar up or down.
A typical pole will have an about 0.9 inch diameter; the rails (and thus the tangs) of an exemplary steel shelf will have a diameter of about 0.2 inch and the holes in the collar may be about 0.21 inch diameter and spaced apart about 1.9 inch. An exemplary collar made of ABS thermoplastic to fit an about 0.9 inch diameter pole may have an overall width of about 2.3 inch and an overall height of about 2.5 inch; and, a body thickness of about 1 inch. An exemplary contact portion/pad may run around ⅛ to ¼ of the circumference of the pole.
In the invention, shelves may have other configurations than that of exemplary shelf 142 and different attachment means may be used, some of which were mentioned at the beginning of this description.
It is within contemplation that the present invention may be employed with collars that are permanently attached to the shelf, notwithstanding the disadvantage mentioned in the Background. For example, the shelf might be attached to the collar by being welded or adhesive bonded to the collar; or a collar might be molded as an integral part of a shelf.
As described, the contact portion of a lower tab preferably comprises a pad. Such pad is fabricated as a separate element so it can be made of a material different from that of the body of the collar. Within the generality of the invention the contact portion may be integral with the material of the tab and the body, yet may have different structural behavior. For example, the material of the collar might have sufficient malleability and surface property to provide the desired frictional engagement property with the pole surface for the tab. And such material may have embedded in it plastic or metal reinforcing members at the body portion of the collar, to provide the requisite structural properties for that element.
In the generality of the invention, pole cross sections other than round may be used. For example, an oblong or square cross section may be used. And collars having different external configurations than exemplified here may be used. For example, the collar may be rectanguloid.
A pole caddy of the present invention may be shipped in knock down condition, as a kit which is packaged in a carton, for example. The pole may comprise several telescoping segments that may be put together by a user. Several individual collars will be included in the kit, unmounted. Several shelves will be provided, each for attachment to a collar after the user has assembled the pole and put the collars on the pole.
The invention, with explicit and implicit variations and advantages, has been described and illustrated with respect to several embodiments. Those embodiments should be considered illustrative and not restrictive. Any use of words such as “preferred” and variations suggest a feature or combination which is desirable but which is not necessarily mandatory. Thus embodiments lacking any such preferred feature or combination may be within the scope of the claims which follow. Persons skilled in the art may make various changes in form and detail of the invention embodiments which are described, without departing from the spirit and scope of the claimed invention.
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