# Patent

## Title
Expandable garden hose

## Abstract

A flexible garden hose having an inner tube member made from elastic material and an outer tube member made from a non-elastic material. The inner tube member is secured to the outer tube member only at an inlet coupler and an outlet coupler. The inlet coupler is constructed to secure to a water supply provided from a conventional household water spigot. The outlet coupler is coupled to a flow restrictor allowing the inner tube member to equalize in pressure with pressurized water received from the water supply. Pressurized water expands the elongated inner tube member longitudinally along a length of the inner tube member and laterally across a width of the inner tube member thereby substantially increasing the length of the hose to an expanded condition wherein the hose contracts to a substantially decreased length when there is a decrease in pressurized water.

## Background
RELATED APPLICATION
In accordance with 37 C.F.R. 1.76, a claim of priority is included in an Application Data Sheet filed concurrently herewith. Accordingly, under 35 U.S.C. §119(e), 120, 121, and/or 365(c) the present invention claims priority, as a continuation-in-part of, U.S. patent application Ser. No. 13/654,832 “Expandable Hose Assembly Coupling Member”, filed Oct. 18, 2012 which is a continuation-in-part of U.S. patent application Ser. No. 13/488,515, entitled “Expandable Hose Assembly”, filed Jun. 5, 2012 and issued Oct. 23, 2012 as U.S. Pat. No. 8,291,942, which is a continuation-in-part of U.S. patent application Ser. No. 13/289,447 entitled “Expandable and Contractible Hose” filed Nov. 4, 2011 and issued Oct. 23, 2012 as U.S. Pat. No. 8,291,941. The contents of which the above referenced applications are incorporated herein by reference.


FIELD OF THE INVENTION
The present invention relates to the field of water hoses and in particular to a garden hose that expands when pressurized water is introduced and modulated by a flow restrictor positioned at the outlet of the garden hose.
BACKGROUND OF THE INVENTION
Conventional garden hoses are typically constructed from rubber or other resilient flexible material such as synthetic rubber, thermo plastic rubber or the like photochemical derivatives. A notable problem encountered with conventional garden hoses relates to the storage of the hose when not in use. Garden hoses can be stored on a hose reel, placed within a storage container, or simply left on the ground. While storage devices are practical in certain situations, in many instances the consumer cannot use or has no desire to employ a storage container. For example, a consumer may live in an apartment or small condo and would like to have the benefit of a garden hose for plant watering, car washing, or the like but does not have room for a garden hose storage device. The hose might be left in the trunk of a vehicle or coiled up in the corner of a patio with an effort to consume as little space as possible. Another example would be the owner of a boat, RV or plane who may wish to leave the hose with the vehicle. Such places are impractical for hose storage containers.
There are many situations where it is beneficial to store a garden hose in as little a space as possible. If the consumer does not have a device for storing the garden hose then they must try to organize the hose on the ground in a way as to not entangle the hose within itself. If improperly organized, the garden hose will tend to kink when uncoiled. This problem is typically encountered by the average homeowner who uses the garden hose infrequently wherein improper storage of a hose can result in the development of kinks. Garden hoses can be made with thick sidewalls to prevent kinking but result in heavy and cumbersome water hoses. Fiber reinforcements can also be used, such as woven tapes or knitting followed by the addition of an outer coating, all of which add to the weight of a garden hose and do not have a shortened length for storage. For this reason, it is of great benefit to have a garden hose that is light in weight, contractible in length, and kink resistant.
Retractable garden hoses are known to use steel wires formed in a coiled shape with a vinyl tube, the steel wires wind through the vinyl tube so that it will normally be in a coiled or rolled configuration when not in use. When pressurized water is introduced into the garden hose, the hose is unwound. When the pressurized water is removed, the water hose is recoiled to a rolled position. Examples of such hoses include U.S. Pat. No. 2,814,529; U.S. Pat. No. 3,035,779 and U.S. Pat. No. 3,966,121.
U.S. Pat. No. 6,523,539 discloses a self elongating oxygen hose for stowable aviation crew oxygen mask. The supplemental gas assembly such as used for aircraft crews is provided which includes a mask adapted to fit over at least the nose and mouth of a wearer, together with a flexible, self-elongating hose assembly and a stowage box for receiving the mask and hose assembly.
The transition zone between a garden hose and pressurized source of water, or the garden hose and delivery point, is accomplished by a coupling. Conventional couplings provide a fluid connection between a spigot and a garden hose. However the prior art fails to disclose a coupling capable of attaching to a flexible garden hose having an expandable inner tube member made of a flexible fluid carrying material and an outer sleeve made of a fixed length fabric material. For instance, U.S. Pat. No. 4,895,185 discloses a flexible hose reinforced by armature layers made of flexible cables disposed helically and is attached at least at one end by compression of said layers against rigid pieces, characterized by the supporting elements and gripping elements, which are coaxial, having non-adhesive conical compression surfaces which diverge toward the end and by at least one wedge provided with slits being driven between reinforcing layers to ensure compression. The tubular sleeve is attached to a rigid assembly wherein ends of the layered pairs are engaged in the conical annular space between the coaxial supporting element and gripping elements.
U.S. Pat. No. 5,816,622 discloses a garden hose having a protective shell section and a flexible strain relief section releasably attached to the shell section. The hose is sealably attached to a stem portion of a coupling by a brass ferrule, the manner by which the hose is attached to the stem portion is stated as being well known in the art. After the end of the hose having the ferrule slipped over the stem portion so that the end of the hose abuts the receive portion, a device is inserted into the stem portion for expanding it thereby sandwiching the hose between the stem portion and the ferrule for locking the hose to the coupling.
U.S. Pat. No. 5,894,866 discloses a garden hose assembly having a deformable section that allows a portion of the hose to be coiled around a support for holding the end of the hose in a desired position. Connectors have coupling sterns which are inserted within a base tube and such coupling stems are then radially expanded into ferrules or corrugations.
U.S. Pat. No. 6,209,800 discloses a flexible tube formed so that adjacent coils are formed while in a contracted position, the tube is extendible by straightening of the coils. A fitting is formed from an elongate, substantially cylindrical externally barbed portion and a disk shaped head. A bore extends through the fitting which is smaller than the inner diameter of the tubing. The fitting portion is inserted into an end of the tube and held therein by an interference fit with barbs inhibiting removal axially of the tube.
U.S. Pat. No. 6,568,610 discloses a flexible water spray wand for connection to a standard garden hose, having a housing connectable at a lower end to the garden hose and at an upper end to a flexible tube assembly connected at an opposite end to a spray nozzle. The flexible tube has an outlet fitting which comprises an externally barbed portion and an externally threaded portion with an annular shoulder therebetween. The barbed portion fits snugly within outlet end portion of the hose with annular shoulder which abuts an outlet end portion of the ribbed tube, which can be affixed by silver soldering or adhesives.
U.S. Pat. No. 6,948,527 and U.S. Pat. No. 7,549,448 disclose a linearly self-actuated hose for use in transporting fluids. A hose has a biasing spring that extends along the full length, and can comprise single or multiple springs and/or multiple diameter spring coils. The spring is covered with hose cover material on the outside and hose cover material on the inside to form a sealed hose and are bowed inward or outward radially between the individual spring coils depending on the intended use of hose. On the end of the hose is mounted a nozzle end which can be designed with standard garden hose threads. The nozzle end comprises an inner crimp ring, and outer crimp ring which also provides threads, and a water restriction ring. The hose can be trapped between crimp rings to provide a compression fit. Crimp rings are also crimped onto each other so that they form a right unit that will not fall apart during use.
U.S. Pat. No. 6,955,189 discloses a garden hose assembly that includes an elongated and flexible tubular member that includes an open first end, an open second end and a peripheral wall extending between the first and second open ends. A cross-section taken traversely to a longitudinal axis of the tubular member has a generally oblong shape when the tubular member is filled with a fluid and a substantially flattened shape when the tubular member is not filled with a fluid. Male and female couplers are defined as conventional garden hose couplers.
Therefore, what is needed in the art is a flexible garden hose that can be coupled to a conventional household water spigot and will extend in length when pressurized water is introduced into the hose, the pressurized water being regulated at an outlet of the hose.
SUMMARY OF THE INVENTION
Disclosed is a flexible garden hose that attaches to a conventional household water spigot and will expand upon the presence of pressurized water introduced into the hose, the expansion made possible by control of the pressurized water through use of a restrictor juxtapositioned to an outlet of the hose. The garden hose can expand longitudinally by use of an elastic water proof inner tube member positioned within a soft fabric outer tube member. The coupling members are constructed from plastic using a crimp ring that allows assembly and servicing without the use of tools.
Accordingly, it is an objective of the present invention to provide a garden hose that automatically expands longitudinally and automatically expands laterally upon the application of water pressure as controlled by a flow restrictor positioned along an outlet of the hose.
It is a further objective of the present invention to provide a garden hose that automatically contracts upon release of water pressure from within the hose.
It is yet another objective of the present invention to provide a garden hose that is relatively light compared to a conventional non-expanding/non-contracting hose of a similar length.
It is a still further objective of the present invention to provide a garden hose that will not kink or become entangled upon itself when in use.
It is still a further objective of the present invention to provide a coupling that can be made of plastic to provide for a lightweight, non-corroding coupling that allows a consumer to repair the hose without tools.
Other objectives and advantages of this invention will become apparent from the following description taken in conjunction with any accompanying drawings wherein are set forth, by way of illustration and example, certain embodiments of this invention. Any drawings contained herein constitute a part of this specification and include exemplary embodiments of the present invention and illustrate various objects and features thereof.



BRIEF DESCRIPTION OF THE FIGURES
FIG. 1 is a plane view of a coiled flexible garden hose of the instant invention;
FIG. 2 is a longitudinal side view of the present invention in a contracted position;
FIG. 3 is an end view of the outlet coupling;
FIG. 4 is a longitudinal view of the present invention in an expanded position;
FIG. 5 is an end view of the inlet coupling;
FIG. 6 is a cross sectional view, perspective view of a section of the garden hose of the present invention taken along line 6-6 in FIG. 4;
FIG. 7 is a cross sectional view, perspective view of a section of the garden hose of the present invention taken along line 7-7 in FIG. 2;
FIG. 8 is a pictorial view of the garden hose with a flow restrictor in a contracted state concealing indicia placed on the outer sidewall;
FIG. 9 is a pictorial view of the garden hose in an expanded state with a flow restrictor and spray nozzle further illustrating viewable indicia on the outer wall;
FIG. 10 is an exploded view of the male outlet coupling;
FIG. 11 is an exploded view of the female inlet coupling; and
FIG. 12 is a cross section view of the inner and outer hose attached to a coupling.



DETAILED DESCRIPTION OF THE INVENTION
While the present invention is susceptible of embodiment in various forms, there is shown in the drawings and will hereinafter be described a presently preferred, albeit not limiting, embodiment with the understanding that the present disclosure is to be considered an exemplification of the present invention and is not intended to limit the invention to the specific embodiments illustrated.
Referring in general to the Figures, set forth is an expandable garden hose of the present invention. The garden hose is self-expanding upon the introduction of pressurized water within the hose, and self-contracting upon release of water from within the hose. The garden hose 10 is composed of two separate and distinct tubes, an inner tube member 14 formed from a material that is elastic and can expand 2 to 6 times its relaxed or unexpanded length, and outer tube member 12 formed from a non-elastic, relatively soft and bendable fabric tubular webbing material. In the preferred embodiment the inner tube member 14 is a natural latex rubber although other materials which have elastic properties similar to rubber can be used. The elastic inner tube member 14 expands radially outwardly or laterally, with respect to its length. The radial expansion of the inner tube member 14 is constrained by the maximum diameter of the non-elastic outer tube member 12. The preferred materials used to form the non-elastic outer tube member 12 are braided or woven nylon, polyester, or polypropylene. The requirements of the outer tube member 12 material are that it be soft, bendable, non-elastic, and should be strong enough to withstand internal pressures to accommodate the highest water pressures typically found in a pump or municipal water supply with a safety factor of about 2.5. For example, while conventional pressure supplies are in the range of 30-60 psi, it is possible for a pump system to provide up to 100 psi. For this reason it is recommend that the inner and outer tube combination be capable of handling pressures up to 250 pounds per square inch, (psi).
The garden hose 10 employs a female inlet coupler 18 at a first end for connecting to a conventional household water spigot and a male outlet coupler 16 at a second end for connecting to a flow restrictor and/or a spray nozzle. The coupler members are constructed from plastic and are designed to be assembled without tools.
The inlet coupler 18 includes a female threaded portion 28 rotatably attached to a first threaded annular collar 71. The female threaded portion 28 is constructed to receive the male threads of a conventional water spigot 23, faucet or the like valve typically found on the exterior of a residence. Most water faucets on residences employ a standard size male coupler or fitting. A gasket, not shown, can further provide a seal between the female threaded portion 28 and the water connection. The annular coupler includes an inlet tubular extension section 36 extending therefrom having an end 73 insertable into a first open end of the inner tube member 14. A flow thru aperture 38 within the inlet coupler 18 allows water to flow through the coupler. The end 73 has an angular face that allows for ease of inserting into the first open end of the inner tube member 14 and may include a barb 75 that provides frictional engagement to the interior wall of the inner tube member 14. In addition to the barb 75, the use of annular ribs 77 enhance the engagement between the first end of the inner tube member 14 and the inlet tubular extension section 36. Upon placement of the first open end of the inner tube member 14 onto the inlet tubular extension section 36, a first ferrule 79 having an inner wall 81 adapted for placement over a portion the first open end of the inner tube member 14 that is positioned over inlet tubular extension section, preferably over the annular ribs 77. In the preferred embodiment the ferrule is a collet having a cylindrical inner surface and a conical outer surface. An outer wall 83 of the first ferrule 79 is sized for placement with a first open end of the outer tube member 12. In a preferred embodiment the first ferrule 79 include kerf cuts 85 that allow for ease of compression of the first ferrule 79 onto the inner tube member 14 when collar member 87, having an inner surface 89 constructed and arranged to thread onto the annular collar 71, crimps the first open end of the outer tube member 12 between the first ferrule 79 and the collar member 87. Further, the collar member 87 engages the first ferrule 79 providing a frictional engagement to seal the first open end of the inner tube member 14 to the inlet tubular extension section 36 allowing the garden hose assembly to be pressurized with water without leakage. The female inlet coupler 18 employs conventional threads commonly employed for the water hose fitting. The inlet coupler 18 may include a hex shaped wall 19 to allow for ease of holding the inlet coupler 18 while the inner tube member 14 is being installed on the inner tubular extension section 36, as well as the tightening of the first collar member 87 so as to prevent marring of the coupler member during installation or removal. The use of a box shaped, triangular shaped or the like shaped wall to provide a gripping surface is contemplated by this disclosure.
The male outlet coupler 16 is formed from a threaded coupling section 20, an annular coupler 24 having a gripping portion 22, and an outlet tubular extension section 32 extending therefrom. A flow thru aperture 31 is centrally disposed along a longitudinal axis of the male outlet coupler 16. The end 37 of the outlet tubular extension section 32 is insertable into a first open end of the inner tube member 14 for securement thereto. In a preferred embodiment, the end 37 includes a barb 39 having an angular face that allows for ease of inserting into the second open end of the inner tube member 14 yet provides frictional engagement to the interior wall of the inner tube member 14. In addition to the barb 39, the use of annular ribs 41 enhance the engagement between the inner tube member 14 and the tubular extension section 32 providing a watertight seal. Upon placement of the second open end of the inner tube member 14 onto the tubular extension section 32, a second ferrule 43 having an inner wall 45 adapted for placement over the second open end of the inner tube member 14 that is positioned over the ribs 41. In the preferred embodiment the ferrule is a collet having a cylindrical inner surface and a conical outer surface with one or more kerf cuts along its length when squeezed. An outer wall 47 of the second ferrule 43 is sized for placement within the second open end of the outer tube member 12 thereon. In a preferred embodiment the second ferrule 43 include cuts 49 that allow compression of the ferrule 43 onto the inner tube member 14 by use of a collar member 51 having an inner surface 53 constructed and arranged to thread onto the annular coupler 24 thereby crimping the outer tube member 12 member between the ferrule 43 and the collar member 51. Further, the collar member 51 engages the ferrule 43 sealing the inner tube member 14 to the outlet tubular extension section 32 allowing the hose assembly to be pressurized with water up to 250 psi. The gripping portion 22 and the collar member 51 can include an outer surface texture to allow ease of assembly upon threading of the collar member 51 to the annular coupler 24. The threaded coupler section 20 employs conventional threads commonly employed for a water hose typically used around the home and garden. The flow thru aperture 31 allows for uninterrupted water passage and the outlet threaded coupler section 20 is available for attachment to a flow restrictor that is capable of preventing the flow of water such as on/off valve 21 and/or a conventional spray nozzle 25. The male outlet coupler 16 may include a hex shaped wall 17 to allow for ease of holding the male outlet coupler 16 while the inner tube member 14 is being installed on the outlet tubular extension section 32, as well as the tightening of the second collar member 51 so as to prevent marring of the outlet coupler during installation or removal. The use of a box shaped, triangular shaped or the like shaped wall to provide a gripping surface is contemplated by this disclosure.
During assembly, the non-elastic outer tube member 12 is attached and connected to the inner tube member 14 only at the first end and second end by the male outlet coupler 16 and the female inlet coupler 18. The outer tube member 12 is otherwise unattached, unconnected, unbonded, and unsecured to the elastic inner tube member 14 along the entire length of the inner tube member 14 between the first end and the second end and thus the outer tube member 12 is able to move freely with respect to the inner tube member 14 along the entire length of the inner tube member 14 when the garden hose expands or contracts.
The garden hose 10 of the present invention is illustrated in its contracted condition in FIGS. 1, 2, 7 and 8. In this condition, the inner tube member 14, which is elastic, is in a relaxed contracted condition wherein there are no forces being applied to the inner tube member 14 to expand or stretch it. The amount of water that may reside in the tube in its contracted condition is much less than while in its expanded condition. Also it should be noted that the outer tube member 12 is not in a bonded contact with the inner tube member 14 when the garden hose is in this contracted condition, there will be a space 15 between the inner tube member 14 and the outer tube member 12 (FIG. 7). As illustrated in FIG. 7, the thickness of the wall of the inner tube member 14, in the contracted position, is relatively large compared to the thickness of the inner tube member 14, in the expanded position, FIG. 6. The expansion of the elastic inner tube member 14 laterally, is the result of an increase in the water pressure within the inner tube member 14. This increase in water pressure also results in the expansion of the length of the elastic inner tube member 14. The expansion of the inner tube member 14, both laterally and longitudinally, results in a decrease in the wall thickness of the inner tube member 14, an increase in the diameter of the inner tube member 14 thus increasing the volume of water that can flow through the inner tube member 14. This decrease in wall thickness is illustrated in FIG. 6, wherein the inside diameter of the inner tube member 14 has been expanded and extended because of an increase of the water pressure and volume within the inner tube member 14.
In the expanded or extended condition, illustrated in FIGS. 4, 6 and 9, the inner tube member 14 is expanded or stretched. In this expanded condition the non-elastic outer tube member 12 constrains the lateral expansion of inner tube member 14. The outer tube member 12 is also taut, smooth, and relatively flat along its length in this extended condition. Since the outer tube member 12 will not expand laterally or longitudinally, the actual length and width of the outer tube member 12 determines the maximum length and maximum width of the garden hose 10 in its expanded condition. Thus the diameter and length of the outer tube member 12 determines the diameter and length of the water hose of the present invention upon the application of water pressure to the interior of the elastic inner tube member 14. This diameter and length of the non-elastic outer tube member 12 is the final diameter and the final length of the garden hose 10 when it is in its expanded condition and in use to transport or deliver water.
In a preferred embodiment of the present invention the garden hose 10 can automatically expand from 2 to 6 times its contracted length upon the introduction of pressurized water into the tube, the pressure would need to be at least 20 psi. For example, in one embodiment a ten foot hose in a contracted condition would automatically expand to 20 feet when pressurize water is supplied to the interior of the inner tube member 14 of the garden hose. In another embodiment, a ten foot hose in a contracted condition would automatically expand to 60 feet when pressurize water is supplied to the interior of the inner tube member 14 of the garden hose.
The water pressure within the garden hose is accomplished by introducing water under pressure into the inlet of the garden hose and restricting the flow of the water out of the outlet of the garden hose by use of a flow restrictor. The flow restrictor may be on/off valve 21 or a spray nozzle 25 capable of turning the water on and off. For example, the female inlet coupler 18 of the present invention 10 is secured to a water spigot 23 such as that found on the exterior wall of a home. The flow restrictor 21 is then secured to the outlet coupler 16 of the hose and placed in an off position so that water cannot pass. When the spigot 23 is opened the pressurized water enters the garden hose 10 and prevented from exiting the flow restrictor while in the off position, wherein the hose is expanded to its predefined length as limited by the outer tube member 12. For instance, a relatively normal pressure for municipal water is about 60 psi wherein the water within the hose is equalized to the same pressure. The flow restrictor 21 is preferable attached to a spray nozzle 25 or is part of the spray nozzle. The spray nozzle 25 can be a conventional water spray nozzle which varies the rate and spray pattern of water exiting from the nozzle but is capable of shutting off the exit of pressurized water. Many spray nozzles are L-shaped so as to be able to be comfortably gripped and used by an individual and have a pivoting on-off handle which operates an internal flow restrictor valve. A spray nozzle provides various amounts of restriction of water at the end of the garden hose depending on how large the opening in the nozzle is. The smaller the opening in the nozzle, the more the nozzle restricts the release of water at the end of the garden hose, and the higher the pressure and water volume inside the garden hose. The larger the opening in the nozzle, the less the nozzle restricts the release of water at the end of the garden hose, and the lower the pressure and water volume inside the garden hose. If the flow of water at the other end of the present invention was turned off and totally restricted, the psi inside the inner tube member would be the same as the pressure coming from the house, 60 psi. At this pressure, the inner tube member 14 and the outer tube member 12 in the present invention would expand to its maximum length. As the water at the end of the garden hose is released, the pressure becomes reduced inside the garden hose and the garden hose begins to contract. However, the present invention will remain fully expanded even when the pressure at the opposite end is reduced below the typical pressure of 60 psi coming from a house. In one example, the water pressure coming from the house was 60 psi and the water pressure exiting the nozzle at the other end of the water hose was 35 psi. This 35 psi of pressure inside the elastic inner tube member 14 was enough pressure to cause the inner tube member 14 to expand laterally and longitudinally until its lateral and longitudinal expansion became constrained by the non-elastic outer tube member 12 and expanded to the maximum length and width of the non-elastic outer tube member 12. In a preferred embodiment, the garden hose 10 expands from ten feet in length in its contracted condition to fifty feet in length in its expanded condition. Alternatively an on/off flow restrictor 21 can be used in combination with a spray nozzle 25 allowing the consumer a device to immediately turn off water to the spray nozzle.
FIG. 12 illustrates how the coupler is secured to the hose wherein the inner tube member is placed over end 73 having an angular face that allows for ease of inserting into the inner tube member 14 yet provides frictional engagement to the interior wall of the inner tube member 14. Barb 75 enhances the engagement between the inner tube member 14 and the tubular extension section 36 providing a watertight seal. Upon placement of the end of the inner tube member 14 onto the inlet tubular extension section 36, a first ferrule 79 is positioned over inner tube member 14. Outer tube member 12 is placed over the outer surface of the first ferrule 79. Collar member 87 is constructed and arranged to thread onto an annular collar thereby sandwiching the outer tube member 12 between the first ferrule 79 and the collar member 87. Further, the collar member 87 engages the first ferrule 79 providing a frictional engagement to prevent the inner tube member 14 from separating from the inlet tubular extension section 36 allowing the garden hose assembly to be pressurized with water without leakage.
A feature of the present invention is the savings in weight of the garden hose. The garden hose 10 in its contracted condition is relatively light an upon expansion the weight of hose does not increase, only the weight of the water within the hose changes the dynamics. Also, because the garden hose does not contain any metal components such as springs, wire mesh or other metal parts along the entire length of the garden hose between the male connector and the female connector a ten foot contracted garden hose may weigh less than 2 pounds and in the expanded condition, (not counting the weight of the water inside the expanded garden hose) the fifty foot garden hose would also only weigh less than 2 pounds. In contrast however, a conventional rubber 1⁄2 inch ID 50 foot garden hose could weigh up to 12 pounds. This savings in weight enables the garden hose of the present invention to be easily carried, easily dragged, easily handled and easily used by anyone who uses the garden hose but especially by individuals who do not posses exceptional strength or do not want to drag, carry or lug around heavy, bulky, conventional rubber hoses.
Another feature of the present invention is that the outer tube member 12 is reduced or decreased in length when there is no pressure within inner tube member 14. With no pressure or volume in the elastic inner tube member 14 the inner tube member automatically contracts. The condition of the outer tube member 12 when the inner tube member 14 is in the contracted condition is illustrated in FIGS. 1, 2, and 8. Because the outer tube member 12 is unsecured to the inner tube member 14 along the entire length of the hose between the first end and the second end, the soft fabric material of the outer tube member 12 can move freely with respect to the inner tube member 14. The fact that the outer tube member 12 can move freely with respect to the inner tube member 14 along the entire length of the garden hose enables the outer tube member 12 to become folded, compressed and tightly gathered around the outside of the circumference of the inner tube member 14 along its length in the contracted condition when there is not water pressure within the inner tube member 14. This folded, compressed and tightly gathered condition of the outer tube member 12 prevents the garden hose 10 from kinking and also helps prevent it from becoming entangled upon itself. Thus, an empty garden hose 10 in the contracted condition is easily stored without worry of the garden hose kinking or becoming entangled, as most conventional garden hoses do. This tendency of the garden hose 10 to not become kinked or entangled enables a user to store the garden hose 10 in a very small space with no worry of having to untangle or unkink the garden hose when it is removed from storage and used. A user of the present invention can take garden hose 10 from a stored condition, secure a nozzle or other water restrictor on one end of the garden hose, secure the garden hose 10 to a water faucet and turn on the water without the fear of the garden hose becoming entangled or kinked or without the need to untangle or unkink the garden hose.
After they are used conventional garden water hoses are normally carried or dragged back to their place of storage and are stored on a reel or coiled up upon themselves and laid on a flat surface. This requires time to carry and drag the garden hose and to properly store the garden hose and also requires an expense to purchase the garden hose reel. The garden hose 10 of the present invention automatically and quickly contracts to its original place of storage and can then be easily folded up, rolled up, or coiled up and stored in any container, even very small containers, or on any surface, thus saving time and expense for the owner of the garden hose.
During the assembly of the garden hose in the preferred embodiment a ten foot elastic inner tube member 14 in its relaxed or contracted condition is inserted into the hollow interior of a 50 foot non-elastic outer tube member 12. The ten foot inner tube member 14 and the 50 foot outer tube member 12 all attached and secured together on a coupler at the first end. The ten foot inner tube member 14 is then stretched or expanded through the hollow interior of the outer tube member 12 until the elastic inner tube member 14 is expanded 2-6 times its relaxed or contracted length, at this point in the assembly process the expanded elastic inner tube member 14 and the non-elastic outer tube member 12 are both clamped down and the inner tube member 14 and the outer tube member 12 are both 50 feet long. The inner tube member 14, and the outer tube member 12 and the expansion restrictor sleeve 26 are then attached and secured together to the coupler at the second end while the garden hose is still in the expanded condition. As previously stated, the elastic inner tube member 14 and the non-elastic outer tube member 12 are only attached and secured together at the first end and the second end. The inner tube member 14 and the outer tube member 12 are unsecured along the entire length of the garden hose between the first end and the second end. This allows the non-elastic outer tube member 12 to move freely with respect to the inner tube member 14 along the entire length of the garden hose between the first end and the second end.
When the clamp is removed at the second end from the expanded 50 foot elastic inner tube member 14 and the 50 foot non-elastic outer tube member 12, the expanded elastic inner tube member 14 automatically contracts within itself back to its original relaxed length of ten feet. The length of the 50 foot non-elastic outer tube member 12 is also reduced to only ten feet in the contracted condition because when the stretched and extended elastic inner tube member 14 begins to contract from its expanded length, the unattached, unbonded, unconnected and unsecured soft fabric non-elastic outer tube member 12 catches on the rubbery elastic inner tube member 14 material causing the outer tube member 12 to automatically become folded, compressed and tightly gathered around the outside circumference of the entire length of the contracted inner tube member 14. Thus, because the 50 foot non-elastic outer tube has many folds that are compressed and tightly gathered around the 10 foot contracted and relaxed inner tube member 14, the folded, compressed and tightly gathered 50 foot outer tube member 12 measures the same 10 foot length as the 10 foot contracted inner tube member 14. As illustrated in FIG. 1, the outer tube member 12 is irregularly wrangled or cinched or shined in its contracted state.
When pressurized water is introduced into the elastic inner tube member 14 in the contracted and relaxed condition, the elastic inner tube member 14 begins to expand laterally and longitudinally and the outer tube member 12 begins to unfold and uncompress around the circumference of the elastic inner tube member 14. Consequently, when the inner tube member 14 expands to its maximum length of for example 50 feet, the outer tube member 12 unfolds, and uncompresses along the entire length of the inner tube member 14 until it reaches the same 50 foot length as the inner tube member 14 in the expanded condition. Also, because the inner tube member 14 expands both longitudinally and laterally and its expansion is constrained by the non-elastic outer tube member 12, the inner tube member 14 fills all of the available space inside the non-elastic outer tube member 12 and thus the surface of the unfolded, uncompressed outer tube member 12 becomes smooth in the expanded condition as depicted in FIGS. 4, 6 and 9.
The garden hose in FIG. 9 is in its expanded condition after water under pressure has been introduced into the garden hose and the pressure and volume of the water has increased inside the inner tube member 14. The expanded length of the garden hose 10 used in this example is now 50 feet, 600 inches, or 15.24 meters. The volume of water within the garden hose 10 is 0.943 gallons, 120 ounces, 3.569 liters, or 3180.64 cubic centimeters. The outer circumference of the garden hose 10 is 2.12 inches or 5.39 centimeters. The diameter of the outer tube member 12 is 0.68 inches or 1.73 centimeters. The diameter of the inner tube member 14 is 0.64 inches or 1.63 centimeters. The thickness of the wall of the inner tube member 14 is 0.031 inches or 0.079 centimeters. The thickness of the outer tube member 12 is 0.031 inches or 0.079 centimeters. The thickness of the outer tube member 12 remains the same in both the expanded and contracted conditions. The material from which the inner tube member 14 is formed can be any color. The garden hose in FIG. 8 is in its contracted condition and its dimensions are as follows. The length of the garden hose is 10 feet, 3.33 yards, or 3.05 meters. The volume of water within the water hose 10 is 0.025 gallons, 3.2 ounces, 0.094 liters, or 94.635 cubic centimeters. The outer circumference of the garden hose 10 is 2 inches or 5.08 centimeters. The diameter of the outer tube member 12 is 0.4 inches or 1.02 centimeters. The inside diameter (ID) of the inner tube member 14 is 0.25 inches or 0.635 centimeters. The outside diameter (OD) of the inner tube member 14 is 0.375. The thickness of the wall of the inner tube member 14 is 0.125 inches or 0.317 centimeters. The thickness of the outer tube member 12 is 0.031 inches or 0.079 centimeters.
The outer tube member 12 is relatively smooth in the expanded condition, as seen in FIGS. 4, 6 and 9. This smooth surface enables the garden hose 10 to be used and manipulated with relative ease. In addition, the expanded elastic inner tube member 14 and the smooth surface of the outer tube member 12 prevent the garden hose from kinking. Also the smooth surface enables indicia to be placed on the outer surface. Indicia placed on the outer tube member 12 can be concealed while the tube is in a contracted state, and become readable upon expansion. An example of this indicia is illustrated in FIGS. 8 and 9, wherein the words “XHoseTM” is placed on the outer tube member 12, when the garden hose is in a contracted state such as FIG. 8 the indicia 13 cannot be read. When the garden hose is in an expanded state such as FIG. 9 the indicia 13 can be easily read. All types of indicia can be placed on the exterior of the outer tube member 12, such as letters, numbers, patterns, designs, and/or pictures. Any type of indicia that can be affixed to the outer tube member 12 can be used. The indicia can be any color also including black or white. The material from which the outer tube member 12 is formed can also be any color.
The preferred embodiment of the present invention utilizes water to fill and expand the garden hose 10. Because the inner tube member 14 is elastic it can expand if the water within the tube freezes. For example, if a garden hose of the present invention were left outside in the winter, the water contained therein would freeze causing an expansion. A conventional garden hose would split due to the internal expansion, the flexible garden hose of the present invention would expand because the inner tube member is elastic without damage.
The present invention provides a unique method of transporting water comprising: inserting an expandable elastic based hollow inner tube member 14 having a first end and a second end into a soft non elastic bendable elongated outer tube member 12 having a first end and a second end, securing a rotatable female inlet coupler 18 to said first end of said inner and said outer tube members and a male outlet coupler 20 to said second end of said inner and said outer tube members, said inner and said outer tube members being secured to each other only at said first and said second ends and unsecured to each other between said first and said second ends forming a hose assembly; attaching a water flow restrictor (21 or 25) to said male outlet coupler; connecting said female inlet coupler to a conventional water spigot 23 and introducing pressurized water into said hollow inner tube through said female inlet coupler causing an increase in water pressure between said female inlet coupler and said male outlet coupler of said hose using said water flow restrictor to regulate water pressure wherein said inner tube member automatically expands longitudinally along a length of said inner tube member and laterally across a width of said inner tube member thereby substantially increasing a length and width of said hose assembly to an extended condition and automatically contracting said hose assembly to a substantially decreased or relaxed length by removing pressurized water from between said female inlet coupler and said male outlet coupler.
All patents and publications mentioned in this specification are indicative of the levels of those skilled in the art to which the invention pertains. All patents and publications are herein incorporated by reference to the same extent as if each individual publication was specifically and individually indicated to be incorporated by reference.
It is to be understood that while a certain form of the invention is illustrated, it is not to be limited to the specific form or arrangement herein described and shown. It will be apparent to those skilled in the art that various changes may be made without departing from the scope of the invention and the invention is not to be considered limited to what is shown and described in the specification and any drawings/figures included herein.
One skilled in the art will readily appreciate that the present invention is well adapted to carry out the objectives and obtain the ends and advantages mentioned, as well as those inherent therein. The embodiments, methods, procedures and techniques described herein are presently representative of the preferred embodiments, are intended to be exemplary and are not intended as limitations on the scope. Changes therein and other uses will occur to those skilled in the art which are encompassed within the spirit of the invention and are defined by the scope of the appended claims. Although the invention has been described in connection with specific preferred embodiments, it should be understood that the invention as claimed should not be unduly limited to such specific embodiments. Indeed, various modifications of the described modes for carrying out the invention which are obvious to those skilled in the art are intended to be within the scope of the following claims.

## Claims

1. A garden hose comprising:
a flexible elongated outer tube member constructed from a soft non-elastic based material having a first end and a second end, an interior of said outer tube member being substantially hollow;
a flexible elongated inner tube member constructed from an elastic based material having a first end and a second end, an interior of said inner tube member being substantially hollow;
an inlet coupler secured to said first end of said inner and said outer tube members, said inlet coupler defined by a female threaded coupling section rotatably attached to a first threaded annular'collar having an inlet flow thru aperture with an inlet tubular extension section extending therefrom and insertable into a first open end of said inner tube member, said inlet coupler having a first ferrule member having an inner wall adapted for placement over said first open end of said inner tube member, said first ferrule member insertable into a first open end of said outer tube member, and a first collar member having a threaded inner surface for releasable securement to said first threaded annular collar sealing said first open end of said inner tube member and securing said outer tube member to said inlet tubular extension section allowing water to flow through said inlet coupler into said inner tube member;
an outlet coupler secured to said second end of said inner and said outer tube members, said outlet coupler having an outlet flow thru aperture with an outlet tubular extension section extending therefrom and insertable into a second open end of said inner tube member, said outlet tubular extension section formed integral to a second threaded annular collar and a male threaded coupling section, a second ferrule member having an inner wall adapted for placement over said second open end of said inner tube member, said second ferrule member insertable into a second open end of said outer tube member, and a second collar member having a threaded inner surface for releasable securement to said second threaded annular collar sealing said second open end of said inner tube member and securing said outer tube member to said outlet tubular extension section allowing water to exit said inner tube member and flow through said outlet coupler;
a water flow restrictor coupled to said male outlet coupling section for restricting the flow of water passing through said inner tube member;
whereby said water flow restrictor creates an increase in water pressure between said inlet coupler and said outlet coupler upon the introduction of pressurized water through said inlet coupler to expand said inner tube member longitudinally along a length of said inner tube member and laterally across a width of said inner tube member thereby substantially increasing a length of said inner tube member to an expanded condition within said outer tube member, wherein said elastic based material of said inner tube contracts to a substantially decreased or relaxed length when there is a decrease in water pressure between said inlet coupler and said outlet coupler causing said outer tube member to be gathered into a contracted state.

2. The garden hose of claim 1 wherein said outer tube member is made from a material selected from the group consisting of nylon, polyester, or polypropylene.

3. The garden hose of claim 1 wherein said inner tube member is made from an elastic material with an elongation ratio which can expand up to six times its contracted or unexpanded length.

4. The garden hose of claim 1 wherein said inner tube member and said outer tube member are made from materials which will not kink or become entangled upon itself when said inner and said outer tube members are in their expanded condition.

5. The garden hose of claim 1 wherein said water flow restrictor is an on/off valve.

6. The garden hose of claim 1 wherein said water flow restrictor is a spray nozzle capable of restricting the flow of water.

7. The garden hose according to claim 1 wherein said inlet coupling section is a conventional female garden hose thread connector available for coupling to a household spigot having pressurized water.

8. The garden hose according to claim 1 wherein said outlet coupling section is a conventional male threaded garden hose connector available for attachment to a conventional spray nozzle.

9. The garden hose according to claim 1 wherein each said ferrule is further defined as a collet having a cylindrical inner surface and a conical outer surface with at least one cut along a length allowing said collet to operate as a compression member.

10. The garden hose of claim 1 including indicia on said outer tube member, wherein said indicia is recognizable when said hose is in an extended condition and said indicia is not recognizable when said hose is in a retracted condition.

11. A method of transporting water comprising:
providing a garden hose formed from inserting an expandable elastic based hollow inner tube member having a first end and a second end into a soft non elastic bendable elongated outer tube member having a first end and a second end,
securing a rotatable inlet coupler to said first end of said inner and said outer tube members, said inlet coupler defined by a female threaded coupling section rotatably attached to a first threaded annular collar having a inlet tubular extension section extending therefrom and insertable into said first end of said inner tube member, said inlet coupler having a first ferrule member having an inner wall adapted for placement over said first end of said inner tube member, said first ferrule member insertable into said first open end of said outer tube member, and a first collar member having a threaded inner surface for releasable securement to said first threaded annular collar sealing said first open end of said inner tube member and securing said outer tube member to said inlet tubular extension section allowing water to flow through said inlet coupler and into said first said inner tube member;
securing an outlet coupler to said second end of said inner and said outer tube members, said outlet coupler having an outlet flow thru aperture with an outlet tubular extension section extending therefrom and insertable into said second open end of said inner tube member, said outlet tubular extension section formed integral to a second threaded annular collar and a male threaded coupling section, a second ferrule member having an inner wall adapted for placement over said second end of said inner tube member, said second ferrule member insertable into a second end of said outer tube member, and a second collar member having a threaded inner surface for releasable securement to said second threaded annular collar sealing said second end of said inner tube member and securing said outer tube member to said outlet tubular extension section allowing water to exit said inner tube member and flow through said outlet coupler, said inner tube member and said outer tube member being secured to each other only at said first and said second ends and unsecured to each other between said first and said second ends forming a hose assembly;
attaching a water flow restrictor to said outlet coupler of said garden hose;
connecting said female inlet coupler to a conventional water spigot and introducing pressurized water into said hollow inner tube through said female inlet coupler,
closing said flow restrictor causing an increase in water pressure between said female inlet coupler and said male outlet coupler wherein said inner tube member automatically expands longitudinally along a length of said inner tube member and laterally across a width of said inner tube member thereby substantially increasing a length of said outer tube member to an extended condition;
opening said flow restrictor allowing water to flow through said garden hose for transporting;
and automatically contracting the inner and outer tube members to a substantially decreased or relaxed length by removing pressurized water from between said inlet coupler and said outlet coupler.

12. The method of transporting water according to claim 11 wherein said inner tube member is elongated at least two times its contracted or unexpanded length.

13. The method of transporting water according to claim 11 wherein said inner tube member is elongated less than six times its contracted or unexpanded length.

14. The method of transporting water according to claim 11 wherein said outer tube member constrains the lateral or radial expansion and the longitudinal expansion of said inner tube member upon an increase of said water pressure between said first coupler and said second coupler within said hose.

15. The garden hose of claim 1 wherein said inlet flow thru aperture is partially hex shaped for receipt of a similar shaped tool for use in assembly of the first collar member.

16. The garden hose of claim 1 wherein said outlet flow thru aperture is partially hex shaped for receipt of a similar shaped tool ease of assembly of the second collar member.