The inventive drain cleaning device relates to devices used for cleaning bathroom drains by removing hair that is collected in the upper portion of the drain where stopper or strainer mechanisms and other obstructions occur or collected anywhere along the drain pipe down to the bottom elbow bends of sink drains where hair has collected (i.e., the drain trap).
Bathroom drains are clogged most often by hair that enters the drain and collects from the drain trap at the bottom up to the drain opening. Most frequently the hair combines with sticky products such as soap, shampoo and toothpaste and builds a “log-jam” of sorts where these drain obstructions catch the hair. and some settles in the drain trap. After sufficient amounts of hair have collected in the drain trap or around the upper opening, the water from the sink basin begins to drain noticeably more slowly, and eventually can completely block the water from draining. Drain chemicals, home remedies such as baking soda and vinegar and plungers are frequently used for these clogs, but often fail to dissolve or dislodge the hair clogging the drain. In extreme cases, the only remaining remedy is to disassemble the drain or use a device that can effectively reach, snag and extract the hair, e.g. a drain snake.
Therefore, there is a need for devices or methods for cleaning the bathroom drain to unblock the drain of accumulated hair. The most frequent method used is a liquid or gel-based chemical agent, which can contain corrosive chemicals that may damage the drain structure. The drain cleaning chemicals may also cause health problems to those who handle the liquids or gels incorrectly. Another problem with chemical agents is that a significant portion of the chemical agent may flow past the hair-clog (for example, in the vertical portion of a bathroom sink drain) such that the chemical cannot effectively submerge the hair in order to completely dissolve it.
This invention uses a hook material layer bonded to a multi-strand cable in a drain cleaner device, in which the hook elements are all oriented in a circumferential direction on the cleaner rod and the rod is rotated to collect and grab onto the hair. These prior art documents show various drain cleaning tools: U.S. Pat. No. 566,110 issued to Wrigley shows an early drain snake with a rotatable handle; U.S. Pat. No. 1,051,992 issued to Fisher et al. shows a coil with hooks at the distal end that resemble fishing hooks; U.S. Pat. No. 1,588,737 issued to Hurd shows a pipe cleaner having a multistrand cable with rounded loops at the distal end; US Patent Application Publication No. 2009/0293214 filed by Ackerman et al. shows a handheld drain clog remover having a plurality of outwardly projecting barbs along its length (the barbs are all oriented axially); US Patent Application Publication No. 2012/0204334 filed by Floto et al. shows a disposable toilet declogging stick having serrated edges along its length (the serrations are oriented axially); U.S. Pat. No. 5,769,960 issued to Nirmel shows a toilet cleaning device having barbs on the distal portion of the device, FIG. 2B; U.S. Pat. No. 6,827,794 issued to Sommerfeld, Sr.; and, U.S. Pat. No. 6,131,229 issued to Lincuna et al. shows a pipe cleaning device having hook elements at its tip.
Another similar drain cleaning device is U.S. Pat. No. 6,775,873 issued to Luoma shows a plastic disposable strip with barbs along its edges to grab hair from a clogged drain. The hooks are all oriented axially toward the handle (i.e., proximal end).
Also, U.S. Pat. No. 5,836,032 issued to Hondo shows a drain cleaning device having an elongated shaft with hook members at the distal tip area, FIGS. 3-5, including both ring like hook element arrangements and helical arrangements on the shaft. However, this document appears to emphasize that the generally inverted J-shaped hooks are all oriented axially towards the handle of the device (rather than circumferential as required herein) and no ‘orphan projections’ (such as used in the present inventive device) are shown or mentioned. Also, This document is silent regarding the use of hook fastener material. Furthermore, this device will need to be cleaned before reuse, rather than having a disposable rod section.
U.S. Pat. No. 6,161,371 issued to Glesser shows a rope covered with hook and loop material along its length, and is used to facilitate fastening to itself or to another similar type of rope. This device cannot be used to remove hair from a drain, since it lacks the necessary stiffness.
U.S. Pat. No. 2,717,437 issued to De Mestral shows an early manufacture of hook and loop fastener material. FIG. 1 shows the hook elements formed by using a heating element (5 in FIG. 1) to melt part of the loop elements, leaving the generally inverted J-shaped hooks and raised pile threads (10 in FIG. 1), that can also be referred to as ‘orphan projections’.
U.S. Pat. No. 5,231,738 issued to Higashinaka shows a combined hook/loop material having hooks and loops on same side of the sheet. FIG. 1(a) shows the hook elements all oriented in the same direction. FIG. 2(a) shows pairs of hook elements oriented in opposing directions. However, this document is silent regarding use in a drain cleaner device.
U.S. Pat. No. 4,123,894 issued to Hughes et al. shows a sealed wire rope having a surface covered with projecting fibers. The purpose here is to enhance the protection of the enclosed wire rope by sealing it and applying lubricant to the outer surface where its adherence is improved by the fibers.
An exemplary embodiment of the invention is a drain cleaning device used to remove clogging hair from a bathroom sink, shower or bathtub drain, in which a reusable handle section is detachably connected to a disposable rod section.
The rod section of the exemplary embodiment includes an extended rod with aircraft control cable as its core and a covering along its entire length made of hook material, in which the individual hooks are oriented in a circumferential fashion (rather than axially or randomly). Its tip is a flattened portion of hook material only, without an inner aircraft cable core, making the tip more flexible for negotiating pipe bends in drains.
Benefits of this exemplary embodiment are: a) removing clogging hair by inserting the rod section into a drain, without removing a drain strainer that may be present (and without disassembling the drain), and rotating the handle to allow the hook elements to grab clogging hair. The device can be pulled out of the drain and then the rod section holding the clogging hair can be discarded. This benefits the user by not having to clean the tool or having to contact the offending, unsanitary hair clog.
The diameter of the rod section of the device 20 is sufficiently narrow to be easily inserted through openings in a typical drain cover 50 all the way to the drain trap 90, often found in older residential bathrooms or modern drains having pop-up stoppers. After insertion of the rod section 20 into the drain, the handle section 14 is rotated, thus winding into and capturing the clogging hair. The particular construction of the hook surface of the rod section 24 and of the rod section tip 26, allows the hair to be collected and grabbed by the drain cleaner device. After grabbing the clogging hair, the device is removed from the drain and the entire rod section 20 can then be decoupled from the handle section 14. The rod section 20 with the collected hair 80 can be safely and environmentally discarded. A new rod section can then be coupled to the reusable handle section to remove hair from another clogged drain.
Details of an exemplary coupling arrangement are provided in U.S. Pat. No. 8,359,696 (Turner et al.). This exemplary coupling arrangement is shown in
The stranded wire rope core 48 is preferably a coated aircraft control cable, e.g., a cable designated as ‘7×7 aircraft cable’ which is specified in detail in military standard specification MIL-DTL-83420 Rev. M, with a maximum diameter of 3/32″ (2.38 mm), coated with vinyl or nylon. The specification describes the cable as being stainless steel. When combined with the hook material, the overall diameter of the rod portion is about ⅛″ (3.18 mm) to 3/16″ (4.76 mm), depending on the thickness of the hook material layer; the height of the hook elements from the hook sheet is excluded from these rod portion diameters as they are resilient and easily lay against the hook (substrate) layer when the rod portion is pushed through a narrow opening.
Regarding the plastic coating 46 on the aircraft control cable, this invention contemplates using a hot melt adhesive to bond the hook material substrate layer 110 firmly and permanently to the coated cable core (using heat and pressure). Therefore, the hot melt adhesive must be compatible with the plastic coating 46 on the cable. The bonded hook material and cable core must withstand the bending and friction that occurs when the rod portion 24 is passed through the drain strainer (or stopper) and is rotated. An example of a suitable type of hot melt adhesive is ethylene vinyl acetate. However, any suitable thermoplastic composition that ensures that the hook material is permanently bonded to the coated multiwire cable 48, e.g., by applying heat and pressure, can be used.
Alternatively, the underside of the hook substrate layer 110 can be provided with a suitable pre-applied adhesive that can bond the hook layer firmly to the cable 48.
The hook substrate layer 110 can be a woven layer of nylon or polyacetate fibers. The hook elements and orphan projection can be made of the same fibers as the woven substrate, but must have sufficient stiffness to be able to hold the collected hair during use of the device, without breaking off or detaching. Alternatively, the hook substrate layer can be a nonwoven or any other suitable textile or plastic layer on which the individual hook elements and orphan projections can be firmly attached.
The impregnating plastic agent and/or the coating on the cable can be PVC (polyvinylchloride or “vinyl”), silicone, polytacrylate, nylon (polyamide) or any other suitable plastic composition. However, any multistranded cable structure that provides the flexibility and other mechanical properties described herein, that can be used to collect hair from a drain, and is suitably impregnated and coated to permanently bond to the hook material substrate, is contemplated by the present invention.
The mechanical properties of the rod portion 24 are determined by the type of multistrand rope 72 and it has a limited range of flexibility, such as required by the specification for aircraft control cables. In the present invention, the minimum amount of flexibility necessary is determined by two factors: the angle at which the device is inserted into the drain and the bend radius of the drain pipe elbow 90. Also, the rod portion 24 must have sufficient flexibility to flex during rotation. The characteristics of multistrand core differ considerably from those of a single metal rod core, which is used in some commercially available drain cleaner devices. Most notably, single rod core drain cleaner devices can be bent into any configuration but do not revert back to their straightened configuration on their own.
The rod tip 26 has a greater flexibility than the rod portion (since it consists only of flattened hook material and does not contain the more stiff aircraft cable), allowing it to flex more for negotiating pipe joints and turns, thereby making greater contact with the internal drain surface during use, as the handle is rotated. The rod tip 26 is attached to the distal end of the rod portion 24 during manufacture, e.g., using an epoxy adhesive at the junction 22 between the rod tip 26 and the rod portion 24.
The hook elements 42 are shown to be in a substantially circumferential orientation in
In
The hair 82 held on the upper rod portion 24 is collected from the upper region of the drain, especially from the area of the drain strainer (50,
The invention also contemplates a method for making the rod section of the device. Since there can be some variation in the distance from the drain strainer to the drain elbow, this invention also contemplates providing rod sections with different lengths. Therefore, a consumer can purchase a rod section having the length appropriate for their particular sink and drain system. In the method of making the device, the hook elements in the resulting device are all oriented in a circumferential direction, corresponding directly with the inventive device.
In order to combine the hook material with the central multistrand cable, both are provided initially as indefinite length forms, i.e., from a cable reel and from a sheet roll. The width of the hook material corresponds to the circumference of the multistrand cable plus bonding agent (cable coating). Both indefinite length forms are combined with the thermoplastic coating/impregnant of the cable used to bond the hook material to the cable in apparatus that are considered to be well known to those skilled in this field of manufacture.
Also, although the hook arrangement shown in
The rod tip 26 is made from a short strip of the same hook material 110 used to make the elongated rod portion, having the same hook element arrangement as shown in any of
The second step is to bond the combined hook material and multi-strand narrow cable core, permanently attaching them together. Any suitable adhesive to bond the hook material strip seam may be used, that permanently bonds the hook material sheet to the cable core. Finally, the coupling and the tip are attached to the elongated rod portion to complete the rod section.
The coupling end of the rod section, and the handle section (including sleeve) can be made by plastic molding in a manner well known in the field of plastic manufacture. The rod section coupling end can have a hole drilled into it to force the rod portion into the coupling end to strengthen connection between these two parts. Also, the bonding agents used to attach the coupling end and the tip to the elongated rod may or may not be the same as the bonding agent used to bond the hook material strip to the cable core, and are considered to be well known in the field of consumer product manufacture.
The hook elements shown on the lower part of this photomicrograph are projecting 90° from the surface of the substrate. The hook elements on the upper part of this figure are angled relative to the substrate surface, due to use of the device. However, all of the hook elements are oriented with the J-shape directed circumferentially in accordance with the invention. Also, the hook elements in this figure are shown arranged in a banded pattern.
Number | Name | Date | Kind |
---|---|---|---|
566110 | Wrigley | Aug 1896 | A |
1051992 | Fisher et al. | Feb 1913 | A |
1588737 | Hurd | Jun 1926 | A |
2717437 | De Mestral | Sep 1955 | A |
4123894 | Hughes et al. | Nov 1978 | A |
5231738 | Higashinaka | Aug 1993 | A |
5769960 | Nirmel | Jun 1998 | A |
5836032 | Hondo | Nov 1998 | A |
6131229 | Lincuna et al. | Oct 2000 | A |
6161371 | Glesser | Dec 2000 | A |
6775873 | Luoma | Aug 2004 | B2 |
6827794 | Sommerfeld, Sr. | Dec 2004 | B2 |
8359696 | Turner et al. | Jan 2013 | B1 |
20060021123 | Turner | Feb 2006 | A1 |