MODULAR BENDABLE STRAW WITH SECURE CONNECTION
An extendible flexible drinking straw segment (10) fabricated so as to be collapsible after having been extended and capable of being bent into many different configurations. The drinking straw segment (10) has male and female tubular end sections (14) and (12) respectively, capable of being joined together in liquid-tight junction (20) or to other like drinking straw segments to form a longer structure. The segment (10) provides a flexible, accordion-like, tubular zone (18) intermediate the end sections (14) and (12). In a further embodiment the male end 34 would be externally threaded and the female end 32 would be internally threaded. Like drinking straw segments are connected using a threaded connection. In another embodiment, each straw section is made of a rigid plastic, e.g., a food grade high density plastic. In this embodiment, when the straw sections are connected together, the straw looks continuous. There is a series of ridges on a male end element which mate with a series of innermost portions of the female end section.
This application claims priority from International Application No. PCT/US2006/001359 filed on Jan. 17, 2006, U.S. Provisional Patent Application Ser. No. 61/072,298 filed Mar. 28, 2008, and U.S. Patent Application Ser. No. 12/218,635 filed Jul. 16, 2008, and which are incorporated by reference herein.
BACKGROUND OF THE INVENTION1. Field of the Invention
This invention relates to extendable, collapsible, flexible drinking straws. The invention is, however, more particularly directed to the further extensibility of flexible drinking straw structures as realized by connecting the end elements of successive flexible drinking straw segments. Various forms and configurations may be realized through the applications of the flexibilities and extensibilities of the drinking straw segments as provided by the invention.
2. Description of the Related Art
Much effort has been directed to the provision of intermediate flexible portions in otherwise rigid tubular drinking straws. These efforts have been pursued from the earliest paper-wound drinking straws through the modern thermal setting plastic or thermoplastic drinking straws and preferably food grade plastic. The early straight, rigid tubular drinking straws exhibited the unwanted difficulty of kinking when an attempt was made to bend one into a more convenient configuration and position for the benefit of a user. Much of the early innovative activity was, therefore, directed to the alleviation of this unwanted kinking and the provision of bendability of drinking straws.
The relevant prior art related to drinking straws includes U.S. Pat. No. 2,557,411, to A. G. Butsch for Child's Drinking Tube issued Jun. 19, 1951. In a specific embodiment, rigid portions of tubular material are formed into a desired configuration and a swivel joint provided so as to bring the mouthpiece into convenient access for a user. No flexible or extendable portions have been provided by the inventor.
A flexible portion in a drinking straw has been provided in the invention by H. L. Levi in Flexible Drinking Straw for which U.S. Pat. No. 3,025,004 was issued on Mar. 13, 1962. The drinking straw so provided is made up of three tubular segments, connected end to end. The drinking end is described as being of a smooth, relatively stiff tube which is then connected to the intermediate portion which is flexible, accordion-like and which in turn is connected to the segment that is dipped into the material to be drunk by the user.
U.S. Pat. No. 3,168,982 was issued Feb.9, 1965 to H. E. Davis for Drinking Straw and described a tubular straw made of a helically wound strip having reinforcing wrinkles that provide flexibility to the body of the straw without kinking
U.S. Pat. Nos. 2,094,268 and 2,550,797 were issued Sep. 28, 1937 and May 1, 1951 for Drinking Tube and Flexible Drinking Straw respectively to J. B. Friedman. The '268 patent describes a method and apparatus for fabricating a flexible section in a tubular drinking straw positioned so that the tube may be bent without substantially reducing the diameter of the straw.
The '797 patent describes a solution to a problem encountered when the drinking straws were attempted to be withdrawn from a package in which they were contained.
U.S. Pat. No. 3,346,187 was issued Oct. 10, 1967 to M. Mueller for Flexible Drinking Straws and describes a flexible tubular thermoplastic resinous drinking straw having sufficient resiliency to return substantially to its normal straight position after release of a bending force.
U.S. Pat. No. 3,409,224 was issued Nov. 5, 1968 to H. J. Harp, et al. for Flexible Drinking Tube. The Harp, et al. patent describes a method and apparatus for forming a flexible zone in tubes formed of thermoplastic material.
U.S. Pat. No. 3,438,578 was issued Apr. 15, 1969 to G. E. Peterson, et al. for Flexible Drinking Tube and describes a thermoplastic drinking tube including a flexible zone and a method for its manufacture.
These prior art innovations and their methods are commendable and show a creative spirit for their times. The quest to optimize ease of use for users of drinking straws including children, invalids and all others has been long and varied and many creative ideas have been contrived. The originators and their methods have contributed remarkably to the technology involved. These prior art innovations and systems, however, do not include those elements of the instant invention that provide a long felt but unmet need in the art. None of the prior art discovered has included highly longitudinally extensible drinking straw segments with the added capability of being serially connected end-to-end to form a much longer construction. None connect together reasonably securely, seal reasonably well against leakage, and look like a one-piece construction.
SUMMARY OF THE INVENTIONIn accordance with one embodiment of the invention, there is provided a modular, collapsible, flexible drinking straw segment which is capable of retaining its form whether collapsed or extended and when subjected to a tortuous shaping force. That is, when retracted or collapsed, the drinking straw segment may be stretched, the drinking straw segment may be collapsed. In either the stretched or collapsed state, the drinking straw segment will be responsive to bending forces and will retain a configuration caused thereby. The drinking straw segment so provided has the additional capability of being joined end-to-end, by a friction fit to other like segments so as to form a structure of any desired length.
In a further embodiment, the straws are joined together using a threaded connection with one end of each straw being internally threaded and one end being externally threaded for fitting inside the internally threaded end of another straw.
In yet another embodiment, straw sections are of a rigid plastic or at least rigid at a connection, are blow molded in identical or substantially identical pieces, each having a male and a female end. The female end is substantially the same as a body of the straw section, and the male end has a tubular portion with multiple longitudinally spaced ridges that engage portions of the female end of another straw section. The tubular portion is fully inserted into the female end, such that when the straw sections are connected in this way, the straw sections appear to be one continuous straw, and the ridges of the male end engage the insides of the female end to longitudinal secure the straw sections together and to seal them against leakage of liquid.
Referring to the drawing and to
In
Referring now to
In another embodiment, shown by
Preferably, especially in this embodiment, the straw is made out of plastic, such as thermo-set or thermo-resin plastic, so that threading can be readily molded. The plastic is preferably food grade plastic and preferably a high density plastic. Examples may include polypropylene or polystyrene.
In another embodiment as shown in
Each of the ridges 54a, 54b and 54c are preferably solid all the way around, and longitudinally spaced (in the axial or lengthwise direction of the male section, so as to correspond to the axial or longitudinal spacing of the innermost projections 56a, 56b and 56c. The tubular portion of the male end has an outer radius which is the same or substantially the same as the inner radius of the female end at the innermost projections 56a, 56b and 56c. The ridges have a slightly larger external radius than the inner radius of the female end at the innermost projections 56a, 56b and 56c, e.g., on the order of one, two or three mils different, but it could be larger, e.g., up to one, two or three hundredths or more, depending upon the plastic used for the straw sections, the dimensions of the straw sections, and other factors that would be evident to one of ordinary skill in the art. The mating of the ridges and the innermost projections should be sufficiently tight to seal the straw sections against leaking at this joint, and to enable the straw sections to stay together under bending stresses and normal usage to create shapes as in the other embodiments herein, such as the shape of
To keep the straw sections together even more securely, there may be a ridge or bump 54e located just before the tubular male end begins. This will further help the seal as well. In addition, the straw section 52 preferably terminates at an end 56e where the straw section extends radially outwardly just past first innermost projection 56a. Accordingly, this end 56e would abut the ridge 54e. The free end 54d of the male section may also have a ridge or flare slightly and be located at a distance from ridge 54c which is just less than the distance between ridges 54a and 54b or 54b and 54c, so that it abuts the innermost projection 56d of the female end to help act as a stopper, and to help seal the connection against leakage.
In another embodiment as shown in
The aspect of the embodiments of
In the embodiments above like reference numerals represent like elements.
The straw sections may have any reasonable length, thickness and radius, and there are many variations in the art. By way of example only, one set of suitable dimensions might be that the male end is about ½″ long or just over ½″, from the free end 54d to just at or just at the far end of ridge 54a (
While blow molding is preferred, extrusion molding and other types of molding may work as well.
Although the invention has been described using specific terms, devices, and/or methods, such description is for illustrative purposes of the preferred embodiment(s) only. Changes may be made to the preferred embodiment(s) by those of ordinary skill in the art without departing from the scope of the present invention, which is set forth in the following claims.
Claims
1. A flexible drinking straw segment comprising:
- a male end element;
- a flexible accordion-like main body joined to said male end element at one end thereof; and
- a female end element amenable to the insertion of said male end element so as to form a liquid-tight junction and joined to the other end of said flexible main body, wherein the straw is unitarily formed in one piece of plastic, and wherein the female end element is constructed the same as the flexible main body and having at least two innermost projections, and wherein the male end has a tubular shape with at least two radially outwardly extending ridges located at a distance apart equal to the distance apart of the two innermost projections and having an outer radius of at least one mil more than an inner radius of the two innermost projections, a distance along the tubular shape of the male end such that when the male end element is inserted into the female end element, the two innermost projections of the female end element are abutting the at least two radially outwardly extending ridges.
2. The flexible drinking straw segment of claim 1 wherein said male end element may be used as a mouthpiece.
3. The flexible drinking straw segment of claim 1 wherein said female end element may be used as a mouthpiece.
4. The flexible drinking straw segment of claim 1, wherein a free end of the female element has a radius less than a maximum radius of the main body of the straw segment.
5. A flexible drinking straw system, wherein there are a plurality of identical straw sections, each straw section comprising:
- a male end element;
- a flexible accordion-like main body joined to said male end element at one end thereof; and
- a female end element having the same accordion-like structure as the main body and amenable to the insertion of said male end element so as to form a liquid-tight junction and joined to the other end of said flexible main body, wherein the straw is unitarily formed in one piece of plastic, and wherein the female end element is constructed the same as the flexible main body and having at least two innermost projections, and wherein the male end has a tubular shape with at least two radially outwardly extending ridges located at a distance apart equal to the distance apart of the two innermost projections and having an outer radius of at least one mil more than an inner radius of the two innermost projections, a distance along the tubular shape of the male end such that when the male end element is inserted into the female end element, the two innermost projections of the female end element are abutting the at least two radially outwardly extending ridges, and wherein a free end of the female element has a radius less than a maximum radius of the main body of the straw segment.
6. The flexible drinking straw system of claim 5, wherein the male end element of a first straw section is disposed in the female end element of a second straw section, and wherein the outer portion of the main body of the first straw section and the outer portion of the female element of the second straw section mate such that the accordion-like structures of each look like one continuous straw.
7. The flexible drinking straw system of claim 5, wherein each of the male end elements have at least three ridges spaced apart the same distance as three innermost projections of the female end elements.
8. The flexible drinking straw system of claim 5, wherein each of the male end elements have at least three ridges, and at least two of the ridges are spaced apart the same distance as two innermost projections of the female end elements, and one of the ridges is spaced less than the distance of the two innermost projections of the female end elements.
9. The flexible drinking straw system of claim 5, wherein each of the male end elements have three ridges space apart the same distance as three innermost projections of the female end elements, such that the ridges abut the three innermost projections when the male end element is inserted into the female end element.
10. The flexible drinking straw system of claim 5, wherein there are at least four straw sections.
11. The flexible drinking straw system of claim 5, wherein there are at least four straw sections connected together.
12. The flexible drinking straw system of claim 7, wherein when the first and second straw sections are connected together only one male end element is visible.
13. The flexible drinking straw system of claim 5, wherein when the first and second straw sections are connected together only one male end element is visible.
14. The flexible drinking straw system of claim 7, wherein there are at least four straw sections.
15. The flexible drinking straw system of claim 6, wherein there are at least four straw sections connected together.
16. The flexible drinking straw system of claim 14, wherein when the first and second straw sections are connected together only one male end element is visible.
17. A flexible drinking straw structure comprising: at least one flexible drinking straw segment comprising; a male end element; a flexible zone joined to said male end element at one end thereof; and a female end element amenable to the insertion of said male end element so as to form a liquid-tight junction and joined to the other end of said flexible zone, wherein the male end element has external threads and the female end element has internal threads such that the male and female end elements may thread together.
18. The flexible drinking straw structure of claim 17 wherein said drinking straw segments are joined together in liquid-tight junction.
Type: Application
Filed: Nov 18, 2010
Publication Date: Mar 10, 2011
Inventor: Shailendria SHAKUR-JENKINS (Canyon Country, CA)
Application Number: 12/949,656
International Classification: A47G 21/18 (20060101);