ARTICULATING CLOSURE FOR FLEXIBLE CONTAINERS
This application describes articulating closures for flexible containers, such as fluid bladders, that have an open end between two flexible walls. Disclosed closures can comprise articulating opposing arms that lock together in a flattened configuration to seal an end opening of a flexible container. The disclosed closures can include four or more rigid arms that are linked together at their ends via pivoting joints to form an articulable loop so that the closure can collapse to a flattened or closed configuration to seal a container and can open to a polygonal configuration. In the closed configuration, the closures can be locked to keep the opening sealed until a user intentionally unlocks the closure.
This application claims the benefit of U.S. Provisional Patent Application No. 62/154,956, filed Apr. 30, 2015, and U.S. Provisional Patent Application No. 62/115,570, filed Feb. 12, 2015. Both provisional applications are incorporated by reference herein in their entirety.
FIELDThis application relates to the field of closures for flexible containers, such as for personal hydrations systems.
BACKGROUNDSufficient hydration is important for replacing bodily fluids during extended periods of aerobic activity, such as cycling. Currently, several methods are known for getting fluids to a person engaged in aerobic activity and in need of fluid replenishment. In an attempt to overcome the deficiencies of water bottles, personal hydration systems have been developed that include a reservoir for holding fluid, a flexible drink tube for conveying the fluid from the reservoir to the person engaged in aerobic activity, and a mouth-operated valve attached to the end of the tube. Reservoirs for hydration systems are generally made from sheets of flexible materials that have been sealed at their edges to provide a watertight container. Soft-side reservoirs or bladders are relatively inexpensive, can be comfortably worn within in a back pack or waist pack, and withstand impact well.
Hydration system bladders typically include a closeable fill port and a drain port that connects to the drink tube. Configurations for the hydration bladder fill ports include screw cap ports welded to one side of the bladder or into the bladder seam. Another approach is to fill through an open seam at the top of the bladder and employ a zipper type or roll-top closure that seals in the fluid.
The various types of fill ports are designed meet certain needs of bladder-based hydration systems. Screw top ports offer secure, robust closing method that is familiar to users. Welding ports to the bladder material is a low-cost manufacturing method that integrates into the processes employed in forming and sealing the bladder edges. Roll and zip top closures offer a wide opening for filling and adding ice to the bladder and facilitate cleaning and drying.
Despite the capabilities of current bladder fill port designs, there remain problems associated with their use. For example, screw-ports welded to the bladder's side can be oversized to offer easier filling, but their side-facing orientation can make them difficult to fill under a faucet. Side-mounted ports can require that the bladder be removed from its hydration pack for filling. Cleaning and drying bladders made with side-mounted fill ports can be troublesome due to the size of the port opening and the tendency of the bladder sides to collapse together. Seam-welded ports can be placed at the top of the bladder, but can be more difficult to weld reliably and can become bulky when made with oversized openings. Roll and zip top closures may not seal as reliably as screw-top closures and may require extra effort to keep them opened during filling.
SUMMARYThis application describes exemplary embodiments of articulating closures for flexible containers, such as fluid bladders, that have an open end for filling, cleaning, etc. Such flexible containers often include at least one additional outlet for dispensing fluid from the container. For example, an exemplary flexible container comprises a fluid bladder having an open upper end, which is sealable by any of the disclosed articulating closures, and a lower fluid exit port that is coupled to a drink tube or the like.
The disclosed closures can comprise articulating opposing arms that lock together in a flattened configuration to seal an end opening of a fluid bladder or other flexible container. The disclosed closures can include four or more substantially rigid arms that are linked together at their ends via pivoting joints to form an articulable loop. The articulating closure formed by the pivotably linked arms can collapse to a flattened or closed configuration to seal a container and can open to an opened polygonal configuration for filling or cleaning of the flexible container. In embodiments with four arms, the four arms can form a “4-bar” mechanism comprising four substantially rigid arms that can freely articulate at all four corners/joints to move between a flattened, closed configuration where the arms are all parallel, and various open configurations.
In some embodiments, the arms can all be about the same length (e.g., forming a rhombus when opened), while other embodiments include arms of different lengths (e.g., forming a kite shape or a non-equilateral parallelogram when opened). For example, a four-arm closure can include two short arms and two long arms, four equal length arms, or four arms all having different lengths. Preferably, the arms can include two groups of arms, with each group have about the same total length, so that each group can form one side of the closure in the closed, flattened configuration. Each group of arms can have a different number of arms, such a two arms per group, three arms per group, or uneven numbers of arms in each group.
The disclosed closures can have arms that extend in three-dimensions such that the several arms are not all co-planar, while in other embodiments the arms are all substantially coplanar and they open and close within a common plane. The several pivot joints can have pivot axes that are all substantially parallel, or one or more of the pivot axes may not be parallel with the others. In any of the disclosed embodiments, the pivot joints between the arms can comprise any type of hinge mechanism, such as pinned joints, ball-and-socket joints, living hinges, flexible material regions, and/or other pivotable mechanisms.
In an open configuration, the arms can form a polygonal configuration forming a central opening. In some embodiments, the closure is removable from a flexible container when opened, while in other embodiments, the closure remains attached to at least a portion of the perimeter of the opening of the flexible container. In the latter embodiments, the closure can be used as a handle or support mechanism to hold and manipulate the container when it is open, such as during filling or cleaning operations, or to suspend or restrain the container.
The disclosed closures can seal closed an opening of a flexible container when the closure is in its closed position. In the closed positions, the disclosed closures can be locked or biased or otherwise held in the closed position and resist inadvertent opening of the closure from the closed position, which could undesirably allow the contents of the container to escape. Different embodiments can accomplish the goal of keeping the closure held in the closed position in different ways. For example, various embodiments can include one or more of the following locking/biasing mechanisms: spring clips with catches, clasps that rotate back to front to capture arms, sliders, zippers, a sliding clasp that then rotates, a clasp that rotates in the longitudinal plane, draw clamps, cam knobs, screw knobs, ratchet or catch-on hinges, snaps, friction fits, interference fits, etc. The locking/biasing feature that maintains the closure in the closed position can include features that are integrated into the rigid arms, separate components that are fixed to the arms, separate components that are mounted on the arms and articulate relative to the arms, and/or separate components that are attachable to the arms to secure them closed and can be removed entirely from the arms when not in use.
While disclosed closures provide a pinching force to close an opening of a container, additional sealing structures can be provided at the sealed location to ensure a leak proof seal. In some embodiments, the container itself can include a sealing structure, such as a tongue and groove interface on opposite sides of the opening. In some embodiments, the closure can include a sealing structure that presses on the outer sides of the flexible container opening to seal the openings. In some embodiments, additional sealing components, such as sealing plates, can be positioned between the inner surfaces of the closure and the outer surfaces of the container opening. Such sealing components can be attached to the container opening or to the closure in various embodiments. A tongue and groove sealing mechanism is just one example, and other exemplary sealing mechanisms include O-rings or other flexible elastomeric gasket-type structures, zippers or zip-lock type sealing mechanisms, structures that kink or fold the walls of the container around the opening, etc. Regardless of the type of sealing mechanism employed, the locking or biasing mechanisms of the closure can apply a pinching/compressive force that works with the sealing mechanisms to seal the opening of the container. However, in some embodiments, the locking mechanism can function independently of the sealing mechanism.
Disclosed closures can provide any one or more of the following exemplary advantages: low profile dimensions, low material volume, low weight, low cost to manufacture, opens wide for filling and cleaning the flexible container, moves between open and closed positions without disconnecting the arms at their pivot joints, open positions have a polygonal shape for maximized opening cross-sectional area, and closures can be used as a handle or holding mechanism.
The foregoing and other objects, features, and advantages of the disclosed technology will become more apparent from the following detailed description, which proceeds with reference to the accompanying figures.
To lock the closure 10 is the closed position, the slider 16 is slid over the joints 24, which blocks the arms from separating and/or applies a compressive force on the arms. One or more of the arms can have a horizontal groove or ridge 32 (see
When the closure 10 is opened and the rigid arms 20 form a quadrilateral shape, the plates 40 can bow and curve away from the inner surfaces of the arms 20 at the ends of the plates beyond the coupling features 42, allowing the plates and the bladder opening to generally form a pointed oval or almond shape.
For purposes of this description, certain aspects, advantages, and novel features of the embodiments of the invention are described herein. The disclosed methods, apparatuses, and systems should not be construed as limiting in any way. Instead, the present disclosure is directed toward all novel and nonobvious features and aspects of the various disclosed embodiments, alone and in various combinations and sub-combinations with one another. The methods, apparatuses, and systems are not limited to any specific aspect or feature or combination thereof, nor do the disclosed embodiments require that any one or more specific advantages be present or problems be solved.
Any of the features or characteristics described herein in relation to any one or more of the described embodiments can also be used with or included in any of the other described embodiments where possible, even if such features or technologies are not specifically mentioned in direct connection to a specific embodiment.
Features, integers, characteristics, materials, or other descriptors provided in conjunction with a particular aspect, embodiment or example of the invention are to be understood to be applicable to any other aspect, embodiment or example described herein unless incompatible therewith. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive. The invention is not restricted to the details of any foregoing embodiments. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.
Although the operations of some of the disclosed methods are described in a particular, sequential order for convenient presentation, it should be understood that this manner of description encompasses rearrangement, unless a particular ordering is required by specific language. For example, operations described sequentially may in some cases be rearranged or performed concurrently. Moreover, for the sake of simplicity, the attached figures may not show the various ways in which the disclosed methods can be used in conjunction with other methods.
As used herein, the terms “a”, “an”, and “at least one” encompass one or more of the specified element. That is, if two of a particular element are present, one of these elements is also present and thus “an” element is present. The terms “a plurality of” and “plural” mean two or more of the specified element. As used herein, the term “and/or” used between the last two of a list of elements means any one or more of the listed elements. For example, the phrase “A, B, and/or C” means “A”, “B,”, “C”, “A and B”, “A and C”, “B and C”, or “A, B, and C.” As used herein, the term “coupled” generally means physically coupled or linked and does not exclude the presence of intermediate elements between the coupled items absent specific contrary language.
In view of the many possible embodiments to which the principles disclosed herein may be applied, it should be recognized that the illustrated embodiments are only preferred examples and should not be taken as limiting the scope of the disclosure. Rather, the scope of the disclosure is at least as broad as the following claims. I therefore claim all that comes within the scope of these claims.
Claims
1. A closure for sealing an opening formed between two opposing walls of a flexible container, the closure comprising:
- at least four arms pivotably coupled together end-to-end and forming an articulable loop, each arm being pivotably coupled to two adjacent arms via pivot joints at each end of the arm, wherein the at least four arms include a first group of arms that forms a first side of the articulable loop and a second group of arms that forms a second side of the articulable loop, wherein the articulable loop is articulable to an open configuration wherein the first group of arms is spaced apart from the second group of arms, and wherein the articulable loop is articulable to a closed configuration wherein the first group of arms is positioned along side the second group of arms; and
- a fastener adapted to secure the articulable loop in the closed configuration and apply a compressive force between the first and second groups of arms;
- wherein the articulable loop is adapted to articulate from the open configuration to the closed configuration while positioned around an opening formed between two opposing walls of a flexible container, such that in the closed configuration the opening between the two opposing walls is sealed closed by compression between the first group of arms and the second group of arms, the compression being applied to the first and second groups of arms by the fastener.
2. The closure of claim 1, wherein all of the arms are substantially the same length.
3. The closure of claim 1, wherein some of the arms have a substantially different length that others of the arms.
4. The closure of claim 1, wherein the articulable loop forms a polygonal shape in the open configuration.
5. The closure of claim 1, wherein the first group of arms has a first total length and the second group of arms has a second total length, and the first and second total lengths are substantially equal.
6. The closure of claim 1, wherein the pivot joints between the rigid arms define respective pivot axes, and the pivot axes are all parallel with one another.
7. The closure of claim 1, wherein in the closed configuration, a compression region between the first and second groups of arms is linear.
8. The closure of claim 1, wherein in the closed configuration, a compression region between the first and second groups of arms in non-linear.
9. The closure of claim 1, further comprising a first sealing liner coupled to the first group of arms and a second sealing liner coupled to the second group of arms.
10. The closure of claim 1, wherein the fastener is detachable from and attachable to the articulable loop in the closed configuration.
11. The closure of claim 1, wherein the fastener is fixed to at least one of the arms and securable to at least one other of the arms in the closed configuration.
12. The closure of claim 1, wherein the fastener is artiuculably coupled to one of the arms.
13. The closure of claim 1, further comprising a second fastener adapted to secure the articulable loop in the closed configuration and apply a compressive force between the first and second groups of arms, wherein the two fasteners are securable to two spaced apart portions of the articulating loop.
14. The closure of claim 1, wherein when the articulable loop is in the open configuration, the articulable loop is positionable around an opening formed between two opposing walls of a flexible container with the first group of arms positioned adjacent to one of the two opposing walls and the second group of arms positioned adjacent to the other of the two opposing walls.
15. The closure of claim 1, further comprising a handle portion extending outwardly from the articulating loop.
16. An assembly comprising:
- a flexible container comprising a first sheet fixed to a second sheet around a portion of the container's outer perimeter and forming an opening between the first and second sheets at a section of container's outer perimeter where the first and second sheets are not fixed together; and
- an articulating closure adapted to selectively close and open the opening of the flexible container;
- wherein the closure comprises: at least four rigid arms pivotably coupled together end-to-end and forming an articulable loop, each arm being pivotably coupled to two adjacent arms via pivot joints at each end of the arm, wherein the at least four rigid arms include a first group of arms that forms a first side of the articulable loop and a second group of arms that forms a second side of the articulable loop, wherein the articulable loop is articulable to an open configuration wherein the first group of arms is spaced apart from the second group of arms, and wherein the articulable loop is articulable to a closed configuration wherein the first group of arms is positioned alongside the second group of arms; and a fastener adapted to secure the articulable loop in the closed configuration and apply a compressive force between the first and second groups of arms;
- wherein the articulable loop is adapted to articulate from the open configuration to the closed configuration while positioned around the opening of the flexible container, such that in the closed configuration the opening is sealed closed by compression between the first group of arms and the second group of arms, the compression being applied to the first and second groups of arms by the fastener.
17. The assembly of claim 16, wherein the closure further comprises a first sealing liner coupled to the first group of arms and a second sealing liner coupled to the second group of arms, the first and second liners being positioned between the first and second groups of arms when the closure is in the closed position to help seal the opening.
18. The assembly of claim 16, wherein the flexible container further comprises a first sealing liner coupled to the first sheet and a second sealing liner coupled to the second sheet, the first and second liners being positioned between the first and second groups of arms when the closure is in the closed position to help seal the opening.
19. The assembly of claim 16, wherein when the articulable loop is in the closed configuration and when the articulable loop is in the open configuration, the first group of arms remains positioned alongside the first sheet and the second group of arms remains positioned alongside the second sheet.
20. The assembly of claim 16, wherein the flexible container comprises a hole passing through the first and second sheets, the hole being surrounded by an annular seam where the first and second sheets are sealed together, the hole and the annular seam being positioned within the outer perimeter of the flexible container; and wherein the fastener extends through the hole to secure the first group of arms to the second group of arms.
Type: Application
Filed: Feb 5, 2016
Publication Date: Aug 18, 2016
Inventor: Matt Hoskins (Bend, OR)
Application Number: 15/016,968