U.S. patent application number 13/654339 was filed with the patent office on 2013-02-14 for integrated water filter and container.
This patent application is currently assigned to OZOLAB. The applicant listed for this patent is OZOLAB. Invention is credited to Serge Beaulieu, Yves Behar, Jordan Harris, Joshua Morenstein, Jennifer Olson, Roo Rogers.
Application Number | 20130037469 13/654339 |
Document ID | / |
Family ID | 44257719 |
Filed Date | 2013-02-14 |
United States Patent
Application |
20130037469 |
Kind Code |
A1 |
Harris; Jordan ; et
al. |
February 14, 2013 |
INTEGRATED WATER FILTER AND CONTAINER
Abstract
A portable vessel for fluids has an integrated filtration
system. A pressing assembly fitted to the vessel includes a
stopper, a rod having a top end and a filtration assembly. A vessel
top receives the pressing assembly such that the rod of the
pressing assembly is slidably attached to a bearing of the vessel
top. A gasket attached to the filtration element maintains a seal
between the inner surface of the vessel and an outer perimeter of
the filtration assembly and the orientation of the rod is
maintained by the gasket and the bearing. In use, pressure applied
to the pressing assembly drives the filtration assembly through the
vessel causing water to be filtered as it passes through the filter
element.
Inventors: |
Harris; Jordan; (Belvedere,
CA) ; Rogers; Roo; (New York, NY) ; Behar;
Yves; (San Francisco, CA) ; Morenstein; Joshua;
(San Francisco, CA) ; Beaulieu; Serge; (San
Francisco, CA) ; Olson; Jennifer; (Brooklyn,
NY) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
OZOLAB; |
New York |
NY |
US |
|
|
Assignee: |
OZOLAB
New York
NY
|
Family ID: |
44257719 |
Appl. No.: |
13/654339 |
Filed: |
October 17, 2012 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
12687050 |
Jan 13, 2010 |
8313644 |
|
|
13654339 |
|
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Current U.S.
Class: |
210/206 ;
210/244 |
Current CPC
Class: |
C02F 1/283 20130101;
C02F 2303/04 20130101; C02F 2307/02 20130101; C02F 1/002 20130101;
C02F 1/68 20130101; C02F 2201/004 20130101 |
Class at
Publication: |
210/206 ;
210/244 |
International
Class: |
B01D 35/30 20060101
B01D035/30; B01D 24/00 20060101 B01D024/00; C02F 1/00 20060101
C02F001/00 |
Claims
1. A container for storing drinking fluids, the container having an
integrated filtration system, wherein the container comprises: a
substantially cylindrical vessel that has an inner surface, an
outer surface and an opening; a pressing assembly that includes a
stopper, a filtration assembly, and a rod having a top end that is
attached to the stopper and a bottom end that is releasably
attached to the filtration assembly; and a vessel top configured to
receive the pressing assembly such that the rod of the pressing
assembly is slidably attached to a bearing of the vessel top,
wherein: the container is a pitcher; the filtration assembly
comprises a chamber that receives a filtration element and a gasket
that maintains a seal between the inner surface of the vessel and
an outer perimeter of the filtration assembly; the orientation of
the rod within the vessel is controlled by the gasket and by the
bearing; and a contaminant present in the water stored in the
vessel is reduced when the pressing assembly is forced through the
vessel.
2. The container of claim 1, wherein the vessel top has a first
opening that mates with the opening of the vessel and the vessel
top has a second opening that is narrower than the first opening,
and wherein the second opening receives the stopper when the
pressing assembly has traversed a predetermined length of the
vessel.
3. The container of claim 1, wherein the filtration element
comprises activated carbon.
4. The container of claim 1, wherein the filtration assembly
receives one or more pods that add a substance to water filtered by
the filtration element when the pressing assembly is forced through
the vessel.
5. The container of claim 4, wherein the one or more pods includes
a pod that adds a fruit essence to the water filtered by the
filtration element.
6. The container of claim 4, wherein the one or more pods includes
a pod that adds a nutrient to the water filtered by the filtration
element.
7. The container of claim 6, wherein the nutrient comprises a
mineral.
8. The container of claim 1, wherein water filtered by the
filtration element when the pressing assembly is forced through the
vessel meets NSF/ANSI Standard 42.
9. The container of claim 1, wherein water filtered by the
filtration element when the pressing assembly is forced through the
vessel meets NSF/ANSI Standard 53.
10. The container of claim 1, wherein the stopper includes a valve
operated by a ring, wherein the ring rotates about an axis of the
bottle between a first and second position, wherein the valve is
closed when the ring is in the first position and open when the
ring is in the second position and wherein the ring is used to
operate the pressing assembly when oriented in the first
position.
11. The container of claim 1, wherein the gasket comprises one or
more of a chevron packing seal and an O ring.
12. The container of claim 1, wherein the gasket comprises an
element having a plurality of fins.
13. The container of claim 12, wherein the gasket comprises one or
more of a U ring and a V ring.
14-15. (canceled)
16. The container of claim 12, wherein the gasket is selected to
withstand a hydrostatic force of at least 5 pounds per square
inch.
17. The container of claim 1, wherein the gasket is selected to
withstand a hydrostatic force of at least 25 pounds per square
inch.
18-20. (canceled)
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates generally to water filtrations
systems and more particularly to personal water filtration systems
integrated with a portable vessel.
[0003] 2. Description of Related Art
[0004] Bottled water is preferred by many consumers for reasons
that include convenience, prestige and perceived quality of bottled
water. In practice, there exist a number of health, sustainability
and environmental issues associated with single-use bottles. The
quality of bottled water can be affected by storage conditions. Up
to 33% of bottled water may be contaminated resulting from both
contamination of sources and bottling facilities as well as the use
of plastic bottles. For example, commonly used plastics can leach
hydrocarbon-based contaminants into water, particularly when the
plastic bottles are stored in direct sunlight or at elevated
temperatures. Furthermore, it is estimated that 87% of plastic
water bottles are dispatched to a land fill rather than a recycling
facility. Transportation costs and effects on the environment are
also increased because bottled water is often shipped from distant
locations, including Fiji and France. Consequently single-use
plastic bottles are associated with increased disposal and
recycling costs and sustainability issues.
[0005] Current alternatives to bottled water employ reusable
bottles, generally designed for sporting and/or camping purposes
and are not optimized for city life. Reusable bottles rely on home
or office filtration systems as a refilling source. Other available
water supplies vary in quality. For example, public water supplies
may have chlorine and other undesirable tastes, often from metallic
conduits. Water supplies may also be affected by the source,
including hard water obtained from an aquifer or river flowing
through limestone. Water sources purified by reverse osmosis
systems may be flat and unattractive to the taste of some
consumers. Water derived from wells or poorly maintained storage
tanks may also harbor contaminants.
[0006] Accordingly, there is a need for a consumer-oriented,
easy-to-use, portable filtration system that is both functional and
stylish.
BRIEF SUMMARY OF THE INVENTION
[0007] Aspects of the present invention address the various
problems with bottled water and reusable portable containers,
including those outlined above. Certain embodiments of the
invention provide a container for fluids that has an integrated
filtration system. The container typically has a substantially
cylindrical vessel with an inner surface, an outer surface and an
opening, usually at an upper end of the vessel. A pressing assembly
includes a stopper that is attached to, or is part of a pressing
assembly, which also includes a filtration assembly. The pressing
assembly further includes a rod having a top end that is attached
to the stopper and a bottom end that is releasably attached to the
filtration assembly. A vessel top is configured to receive the
pressing assembly such that the rod of the pressing assembly is
slidably attached to a bearing of the vessel top. A chamber of the
filtration assembly receives a filtration element and has a gasket
attached that maintains a seal between the inner surface of the
vessel and an outer perimeter of the filtration assembly. The
orientation of the rod is controlled by the gasket and by the
bearing. In use, pressure applied to the pressing assembly drives
the filtration assembly through the vessel, typically from top to
bottom, and cause unfiltered water to pass through the filter
element in order to remove dissolved chemicals, microbes and
particulate materials in the unfiltered water. Filtered water is
obtained in the upper portion of the vessel.
[0008] In some embodiments, the filtration element comprises
activated carbon. The filtration assembly may receive one or more
pods that add a substance to water filtered by the filtration
element when the pressing assembly is forced through the vessel.
The additive may be fruit essence and/or a nutrient to the water
filtered by the filtration element. The nutrient comprises a
mineral. Water filtered by the filtration element when the pressing
assembly is forced through the vessel meets NSF/ANSI Standard 42
and/or NSF/ANSI Standard 53.
[0009] In some embodiments, the stopper includes a valve operated
by a ring, whereby the ring rotates about an axis of the bottle
between a first and second position such that the valve is closed
when the ring is in the first position and open when the ring is in
the second position. The ring may also be used to operate the
pressing assembly when oriented in the first position.
[0010] In some embodiments, the gasket comprises an element having
a plurality of fins, such as a U-ring or a V-ring. The gasket may
also comprise a chevron packing seal and/or an O-ring. In some of
these embodiments, the gasket is selected to withstand a
hydrostatic force of at least 5 pounds per square inch. In some of
these embodiments, the gasket is selected to withstand a
hydrostatic force of at least 25 pounds per square inch or greater.
It will be appreciated that some gaskets could be used that
withstand lesser hydrostatic pressures. The container may be a
bottle or a pitcher or be provided in some other suitable form.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] FIG. 1 shows two examples of vessels according to certain
aspects of the invention.
[0012] FIG. 2 depicts one example of a bottle in assembled and
partially disassembled forms.
[0013] FIG. 3 provides cross-sectional views of an example of a
vessel constructed according to certain aspects of the
invention.
[0014] FIG. 4 shows an example of a simplified filtration
assembly.
[0015] FIG. 5A is a cross-sectional view of a bottle constructed
according to certain aspects of the invention.
[0016] FIG. 5B is an exploded view of a filtration element used in
certain embodiments of the invention.
[0017] FIG. 6 illustrates an example of the structure of filter
components that can be stacked within a filter element of the
present invention.
[0018] FIG. 7 depicts certain operational aspects of a bottle
constructed according to certain aspects of the present
invention.
[0019] FIG. 8 shows an embodiment of the invention that includes a
drinking straw.
[0020] FIGS. 9A and 9B depict mechanisms for managing a drinking
straw according to certain aspects of the invention.
[0021] FIGS. 10A and 10B shows a pitcher in one embodiment of the
invention.
[0022] FIG. 11 illustrates a procedure for filtering water using a
vessel according to certain aspects of the invention.
DETAILED DESCRIPTION OF THE INVENTION
[0023] Embodiments of the present invention will now be described
in detail with reference to the drawings, which are provided as
illustrative examples so as to enable those skilled in the art to
practice the invention. Notably, the figures and examples below are
not meant to limit the scope of the present invention to a single
embodiment, but other embodiments are possible by way of
interchange of some or all of the described or illustrated
elements. Wherever convenient, the same reference numbers will be
used throughout the drawings to refer to same or like parts. Where
certain elements of these embodiments can be partially or fully
implemented using known components, only those portions of such
known components that are necessary for an understanding of the
present invention will be described, and detailed descriptions of
other portions of such known components will be omitted so as not
to obscure the invention. In the present specification, an
embodiment showing a singular component should not be considered
limiting; rather, the invention is intended to encompass other
embodiments including a plurality of the same component, and
vice-versa, unless explicitly stated otherwise herein. Moreover,
applicants do not intend for any term in the specification or
claims to be ascribed an uncommon or special meaning unless
explicitly set forth as such. Further, the present invention
encompasses present and future known equivalents to the components
referred to herein by way of illustration.
[0024] Certain embodiments of the invention provide a standalone,
manually-operated filtering system that can be used to purify
water. In particular, the filtration system provides a method for
passing drinking water through one or more filter elements that can
remove contaminants that may include particulates, microbes and
chemicals, whether dissolved or in suspension. The filtration
system may additionally receive an element that infuses the water
with flavoring, nutrients and other such additives. The degree of
filtering can be selected by choosing from a range of filters. For
example, filtration to NSF-42 and NSF-53 levels can be attained by
selection of filters and seals. NSF International is a
not-for-profit, non-governmental organization and is the world
leader in standards development, product certification, education,
and risk-management for public health and safety. NSF is accredited
by the American National Standards Institute ("ANSI") to develop
American national standards for drinking water treatment units has
developed key standards for evaluation and certification of
drinking water treatment units.
[0025] NSF/ANSI Standard 42 applies to drinking water treatment
units address aesthetic effects, covering point-of-use (POU) and
point-of-entry (POE) systems designed to reduce specific aesthetic
or non-health-related contaminants (chlorine, taste and odor, and
particulates) that may be present in public or private drinking
water. NSF/ANSI standard 53 applies to drinking water treatment
units and addresses health effects covering point-of-use (POU) and
point-of-entry (POE) systems designed to reduce specific
health-related contaminants, such as Cryptosporidium, Giardia,
lead, volatile organic chemicals (VOCs) and methyl tertiary-butyl
ether (MTBE) that may be present in public or private drinking
water. Examples of filter elements will be discussed below, but
many embodiments employ at least one filter element that uses
activated carbon to remove chemicals from water.
[0026] Certain embodiments of the invention comprise a container
that has an integral filtration system. The container may take any
shape or form appropriate for an intended use. FIG. 1 shows two
examples of forms according to certain aspects of the invention. A
bottle 10 can be shaped and sized based on a targeted application.
For example, a bottle may have an outer diameter 14 of a lower
cylindrical portion that is selected to fit a cup holder of an
automobile or other vehicle. In another example, bottle 10 may have
a substantially cylindrical body 16 sized to fit in a bottle holder
of a bicycle, sling, belt and/or backpack, etc. Bottle 10 is shown
to have an opening 12 to facilitate pouring or to allow a user to
drink directly the contents of bottle 10. A pitcher, carafe or
other vessel 11 may be shaped and sized to provide a desired
quantity of water in a container that can be provided in a kitchen
or dining room setting and can be easily carried to other locations
in a residence, restaurant, hotel, sporting facility, and so on.
Pitcher 11 is depicted as having a generally transparent body 17, a
handle 170 and lid 13, with a filter element a9 that rests at the
bottom of the container 11.
[0027] Turning to FIG. 2, an example of a bottle 20 is shown in
assembled form 20 and partially disassembled form. In this example,
bottle 20 can be formed with a metallic vessel body 22, top (or
neck) 24 and stopper assembly 26. Any suitable metal and/or metal
alloy may be used including, for example, steel (particularly,
stainless steel), aluminum, copper, gold, silver, etc. Other
materials can be used including, for example, glass,
Polyoxymethylene ("POM"), HDPE, ABS, PET, PS, PP and copolyster.
Materials can be used in combination, including for example, a
combination of steel with POM reinforcement. In another example, a
vessel body 22 constructed from glass can be combined with
stainless steel top 24. Multiple layers may be formed using metals,
alloys, platings, anodizations, coatings and so on. In one example,
a copper element may have a nickel plated exterior and an interior
surface coated with an impervious, inert plastic material. In
another example, ceramics may be employed to obtain thermal
insulation and finished surfaces may comprise metal layers,
sintered layers and/or glazed surfaces. It will also be appreciated
that thermal insulation may be obtained buy separating two or more
layers separated by an insulator, including an insulating layer of
air.
[0028] Certain general aspects of the filtration system can be
observed in the partially disassembled depiction of bottle 20. A
pressing assembly 260, 262 is fixed to stopper assembly 26 and
slidably attached to neck 24 of bottle 20 such that, when neck 24
is secured to body 22 (see (bottle 20), a tray, container or other
filtration element (hereinafter, referred to interchangeably as
"filter") 262 can be raised or lowered within body 22 by
respectively pulling stopper assembly 26 away from neck 24 or by
pushing stopper assembly 26 towards neck 24. The movement of
stopper assembly 26 may be facilitated using pull-ring 28. Filter
262 is attached to stopper assembly 26 by a stem or rod 260 that
typically has a length that allows the filter 262 to travel the
full length of body 22. Filter 262 may be provided with a contoured
form that snugly fits the interior bottom of body 22, thereby
providing an effective lock against lateral motion of the filter
262 when the bottle is in use. As will be discussed later, neck 24
typically includes a gasket and/or bearing that maintains a tight
fit with the stem 260. Stopper assembly 26 can typically be locked
to prevent unintended withdrawal of the stem 260 (and consequent
ascension of filter 262) when in use.
[0029] FIG. 3 depicts, in cross-section, another example of a
bottle 30 provided according to certain aspects of the invention.
In FIG. 3, bottle 30 is shown with stopper assembly 35 in its
normal, rest position, where it is releasably attached to neck
assembly 37 and defines the height (300) of bottle 30 when closed.
FIG. 3 also shows bottle 30 with stopper assembly 35' extended
upwards away from neck assembly 37 to a maximum height 302 from the
bottom of the body 31. Contents are typically liquid and are
maintained in an inner space 32. The maximum volume of contents
that can be held by inner space 32 is reduced in this embodiment by
the volume of filtration element 34, which is configured to
traverse the axial length of bottle 30.
[0030] In the example of FIG. 3, assembly of bottle 30 is
facilitated by one or more screw threads used to fasten body 31 and
neck 37 together. Stopper assembly 35, including stem 33 and filter
34 are secured by a gasket and/or bearing 375. Filter 34 prevents
stem 33 from being withdrawn completely through neck assembly 37.
Stem 33 may be fastened to stopper assembly by any suitable means,
including by screw fastening (as shown at 36), by welding, glue,
bonding and/or by separate mechanical fastener. It is contemplated
that, in at least some embodiments, the stem may be fabricated as
an integral part of the stopper assembly--or some portion
thereof--by molding, extrusion, machining or any other available
means. Likewise, filtration element 34 may be similarly attached to
the lower end of stem 33. However it will be noted here, and
described in more detail below, that the connection of filtration
element 34 to stem 33 typically requires an impermeable bond that
resists fluid under significant pressure.
[0031] FIG. 4 shows a simplified filtration assembly according to
certain aspects of the invention. As depicted, the filtration
assembly comprises basket 40 and cover 42 elements that create an
enclosure when fastened to stem 41. The enclosure receives filter
elements 44 and 46 and, optionally, treatment elements (not shown).
Sealing elements 48 provide an internal seal within the enclosure
created by basket 40 and cover 42. It will be appreciated that the
basket is typically constructed to closely fit within the body of
bottle 49 in order to facilitate creation of a seal that directs
fluid through filter elements 44 and 46.
[0032] FIGS. 5A and 5B provide views of vessels a filter assembly
59 according to certain aspects of the invention. FIG. 5A shows a
bottle that comprises a main vessel 57, a vessel top 51, a lid or
stopper 50, a plunger rod or stem 52 and a filter assembly that,
when assembled forms a cage having a cage top 53, a cage bottom 56,
a gasket element 54 and a filter pod or insert 55. Gasket element
has a plurality of fins 540 around its circumference that creates a
seal when assembled cage 59 is inserted into vessel 57. Main vessel
57 and vessel top 51 are typically provided with threads that
enable vessel top 51 and main vessel 57 to be fastened
together.
[0033] FIG. 5B shows assembled filter assembly 59 and provides
additional detail of filter assembly 59 components. Filter assembly
59 comprises a top element 53 and a bottom element 56 that create
an enclosure, basket or cage that holds one or more filter elements
55 (also referred to as filter pods 55). The filter element 59 is
typically constructed to tightly fit within the main vessel 57. A
seal may be obtained using separate gasket element 54 (e.g., as
depicted in FIG. 5A) and/or may be obtained and/or augmented using
gaskets provided as part of top element 53 and/or bottom element
56. Gasket element 54 is used to create a seal between filter
assembly 59 and the inside surface 572 of bottle 57 (see FIG. 5A).
In one example, bottom element 56 can be fabricated with a
circumferential groove or notch to receive an annular sealant as an
alternative to, or in addition to, separate gasket element 54.
[0034] The seal between filter assembly 59 and the inside surface
572 of bottle 57 prevents leakage of unfiltered water into the
filtered (upper) portion of water stored within main vessel 57.
Effectiveness of the seal can be maximized by fabrication of the
filter assembly 59 to tight manufacturing tolerances. Any remaining
gaps are sealed by one or more of the described gasket elements 54.
The seal must typically withstand pressures of between 5 and 25
pounds per square inch. Consequently, many embodiments are
constructed to minimize the area covered by a seal, thereby
reducing stresses on the gasket materials. The level of hydrostatic
pressure within the main vessel 57 during filtration is determined
by the structure and quantity of filtration elements, as well as
the dimensions of the vessel 57 and filtration assembly 59.
[0035] Gasket element 54 may include a groove or slot to receive an
annular seal that can be one or more of an O ring, a U seal, a V
seal, a washer, a cup seal and a chevron packing seal. This list is
not intended to be exhaustive and the type of seal used may be
based on a number of factors including availability, performance
under pressure, friction, material strength and inertness of
components. Seals are often constructed from rubber, silicone
rubber, PTFE, fabric reinforced nitrile, polyethylene and other
polymers. However, it is contemplated that seals may be constructed
from other materials as dictated by requirements of the
application.
[0036] Filter element 55 may be provided as a solid, hard or soft
container into which a filtering material is packed. As depicted in
FIG. 5B, filter element 55 comprises an annular component that
tightly fits within the enclosure formed by top element 53 and
bottom element 56. In one example, the filter element comprises
packed activated carbon capable of removing impurities and
dissolved chemicals from water passing through filter element 55.
The depicted "hockey puck" filter element 55 may be encased or
surrounded by a material that provides additional filtering of
particulate matter and prevents the escape of carbon dust into the
filtered water. A cover of polypropylene, cellulose, natural fiber,
treated paper or other suitable material can be used as necessary
or desired and the cover may be conforming (e.g. a coating) or have
a loose "tea-bag" like form.
[0037] The fit of the filter element 55 within the filter assembly
59 may be improved by providing additional seals between filter
element 55 and bottom element 56, top element 53 and/or gasket
element 54. It will be appreciated that the gasket 54 and other
seals, where used, are provided to force fluid flowing from beneath
the bottom element 56 to beyond the top element 53 through the
filter element 55 without leakage. Typically, the fluid flows under
a hydrostatic pressure ranging between 5 psi and 10 psi, but it is
contemplated that pressures up to 25 psi may be handled by the
filtration system.
[0038] Fit of components, structure of seals and gasket element
construction typically takes into consideration the pressure
expected from use of the device. For example, an NSF-53 rated
filter element may comprise multiple tightly packed filter elements
55 that provided substantial resistance to water flow.
Consequently, elevated pressures may be expected as the filter
assembly 59 is lowered into the bottle. In high pressure
situations, various design alternatives are available. For example,
a tighter fit between bottom element 56 and the inner surface of
bottle 30 and/or between top element 53 and the inner surface can
limit the surface area of gasket and seals exposed to the elevated
pressure. In another example, seals and gaskets may have multiple
fins (e.g. a U seal or V seal) that improve the reliability of the
sealing mechanism by preventing leakage from bottom to top elements
56 and 53 respectively.
[0039] As depicted, elements 53, 54 and 56 of the filter assembly
59 each comprise a generally planar surface that includes a number
of radially oriented perforations, such as the depicted radially
disposed slots 530, that conduct fluid through the filter assembly
59. Some embodiments use other configurations of perforations
including differently oriented slots, holes or some combination of
both slots and holes. Some embodiments provide a composite surface
that can include a wire gauze and/or a permeable material.
Different elements of the filter assembly 59 can use combinations
of surface materials, different surface structures and/or different
channels, holes and/or slots to conduct fluid through the assembly
59.
[0040] FIG. 6 illustrates filter components 550 (see also, FIG. 5B)
that can be stacked within a filter element such as element 55.
Components 60, 62, 64 and 66 can be stacked one upon the other
within the filter element 55. Each of these components 60, 62, 64
and 66 may be oversized in order to ensure a reliable seal with the
walls of filter element 56. As shown in the cross-sectional view of
component 60, the component 60 comprises a filter material 600
packed within a permeable container that is characterized by ribs
602 and 604 that are typically impermeable and provided edge seals
for the component 60. While filter element can be filled entirely
with a solid or packed filter material, the arrangement depicted in
FIG. 6 offers an ability to perform multi-stage filtering. For
example, a first filter component 60, relative to fluid flow 68,
may block passage of particulate matter, second component 62 may
have a pore size calculated to block microbes, third component 64
may remove chemicals using, for example, activated carbon and a
fourth element 66 may infuse flavor into the fluid.
[0041] While the filter element 55 and filter components 60, 62, 64
and 66 are depicted as annular in shape, that many embodiments
secure the filter element 55 to stem 52 at a top element 51 and,
filter components 60, 62, 64 and 66 and/or filter element 55 can be
cylindrical. It will be appreciated that certain advantages accrue
from using non-annular filter components 60, 62, 64 and 66
including a reduction in hydrostatic pressure required to support
fluid flow 68, improved throughput and less complex sealing
mechanisms.
[0042] FIG. 7 depicts a bottle 70 that comprises a multi-function
ring 76 that serves to draw a filter element 72 along the axis of
the bottle 70 and may additionally be used to lock a stopper
assembly 74 and/or operate a valve 78 that permits a user to drink
the contents of the bottle 70. FIG. 7 depicts the example of a
valve 78 and ring 76 in closed 700, open 702 and open/locked 704
positions. In closed configuration 700, ring 76A may be in located
in a generally vertical plane to allow the ring 76A to be used for
pulling/pushing the stopper mechanism 74 along the axis of bottle
70 or for carrying the bottle 70 on a hook, string, etc. Note that,
in closed configuration 700, the stopper mechanism may be locked
by, for example rotating the ring 76 through a predetermined angle
as shown at 76A. To open the valve 78B, the ring 76B may be rotated
as shown at 75. Further rotation 77 of the ring to position 76C may
lock the valve 78C in an open position.
[0043] It will be appreciated that variations on the theme of FIG.
7 may be used as desired. For example, FIG. 8 shows an embodiment
in which the ring-locked position 76C of FIG. 7 exposes a drinking
straw 82 coupled to ring 80. FIGS. 9A and 9B show alternate
mechanisms by which a straw 80 may be presented. In FIG. 9A, straw
end 94 is rotated from rest position (when ring 90 is in a vertical
position) to position 95 when ring is rotated to locked position
91. Raised straw end 95 is coupled to an internal straw 92 inside
the bottle. In FIG. 9B, straw end 96 is rotated from rest position
(when ring 90 is in a vertical position) to position 97 when ring
is rotated to locked position 91. When straw end 96 is in rest
position, attached internal straw 92 is pinched shut.
[0044] FIGS. 10A and 10B shows the pitcher 11 of FIG. 1, separated
into major functional components. In FIG. 10A, pitcher 11 comprises
a vessel 17 into which a plunger assembly may be inserted. The
principles of operation are similar to those described above in
relation to bottle containers. The pitcher 11 can purify water
through manual operation. An integrated handle 170 facilitates easy
pouring and storage within a refrigerator, for example. The pitcher
11 comprises a vessel that can be made from glass, and a manually
fed press plunger assembly 15. The press plunger 15 is supported
along the circumference of filter assembly 19 and along the moving
shaft 150 of the plunger, typically by the lid component 13. Water
is filtered when the plunger 15 is manually pressed down into the
vessel and the filter assembly 19 passes the water through the
filter. Filter assembly 19 comprises at least an upper element 190,
a lower element 192 and one or more filter pods (not shown). By
supporting the plunger in two locations, a gasket along the
circumference of the filter assembly 19 is able to maintain a
constant seal against the wall of the vessel 17 resulting in an
extremely pure level of filtration.
[0045] In FIG. 10B, filter element 19 is shown in assembled form.
The filter element 19 depicted has a plurality of fins 194 provided
as a gasket element or attached to the outer circumference of upper
element 190 and/or lower element 192.
[0046] Certain embodiments of the invention comprise methods for
operating the above-described personal filtration systems that
allow users to filter water without the need for a powered pump.
FIG. 11 shows a procedure for filtering water using a bottle,
although the general principles of operation apply equally to other
embodiments, such as pitchers and carafes. Referring to the example
of FIG. 11, in a system comprising stainless steel vessel 110,
vessel top 112 and a manually fed press plunger 114 having a shaft
116 and a filter assembly 118. As described above, the press
plunger 114 is supported at two locations, namely along the
circumference of a filter assembly 118 and along the moving shaft
of the plunger 116, typically located at the mouth of the bottle.
By supporting the plunger in two locations, the gasket along the
circumference of the filter assembly is able to maintain a constant
and consistent seal against the wall of the vessel. At step 1, the
plunger 114 is raised from the vessel 110 and vessel top 112. At
step 2 the vessel top 112 and complete plunger is removed from the
vessel. Optionally, or as necessary, the filter materials within
filter element 118 is replaced or replenished. At step 2, water can
be added to the vessel 110. The vessel top 112 and press plunger
114 are reattached to the vessel 110. Then at step 3, a force
applied to the press plunger 114 causes the filter element 118 to
be driven through the water to the bottom of the vessel 110. The
water assign through the filter toward the top of the vessel 110 is
filtered by filter pods in filter assembly 118. When the plunger
114 is returned to its lowest (rest) level, the water in the vessel
is available for consumption. The result is an extremely pure level
of filtration.
[0047] As noted above, filtration assembly 118 may form a cage that
holds one or more optional pods that contain material to be added
or infused to the purified water--i.e. after filtration. These
optional pods can add minerals and flavors to the water according
to the taste of the consumer. For example, a pod may contain one or
more of minerals and fruit essence. The bottle is filled with
potable water and the filter apparatus is inserted into the top of
the bottle where a gasket around the top of the cage forms a seal
against the interior of the bottle. The filter cage is then pushed
to the bottom of the bottle and water is forced through the filter
pods and the filtered water remains stored in the bottle until use.
The seal around the periphery of the cage against the interior of
the bottle is maintained to prevent water from bypassing the
filter. Although a bottle and cage are described as comprising
stainless steel, other materials may be used in the
construction.
[0048] In certain embodiments, filter pods are constructed of
activated charcoal encased in particulate-filtering paper.
Vitamins, minerals, flavors and other additives are typically
provided in water soluble form that provide a desired dosage per
bottle of filtered water. For example, the dosage may be calculated
to meet or exceed recommended daily intakes of nutrients.
Additional Descriptions of Certain Aspects of the Invention
[0049] The foregoing descriptions of the invention are intended to
be illustrative and not limiting. For example, those skilled in the
art will appreciate that the invention can be practiced with
various combinations of the functionalities and capabilities
described above, and can include fewer or additional components
than described above. Certain additional aspects and features of
the invention are further set forth below, and can be obtained
using the functionalities and components described in more detail
above, as will be appreciated by those skilled in the art after
being taught by the present disclosure.
[0050] Certain embodiments of the invention provide a container for
storing, filtering and drinking fluids. In some of these
embodiments, the container has an integrated filtration system.
Some of these embodiments comprise a substantially cylindrical
vessel that has an inner surface, an outer surface and an opening.
Some of these embodiments comprise a pressing assembly. In some of
these embodiments, the pressing assembly includes a stopper. In
some of these embodiments, the pressing assembly includes a
filtration assembly. In some of these embodiments, the pressing
assembly includes a rod having a top end that is attached to the
stopper and a bottom end that is releasably attached to the
filtration assembly. Some of these embodiments comprise a vessel
top configured to receive the pressing assembly. In some of these
embodiments, the rod of the pressing assembly is slidably attached
to a bearing of the vessel top. In some of these embodiments, the
filtration assembly comprises a chamber that receives a filtration
element and a gasket that maintains a seal between the inner
surface of the vessel and an outer perimeter of the filtration
assembly. In some of these embodiments, the orientation of the rod
is controlled by gasket and by the bearing. In some of these
embodiments, a chemical dissolved in the water stored in the vessel
is removed when the pressing assembly is forced through the vessel.
In some of these embodiments, the vessel top has a first opening
that mates with the opening of the vessel and a second opening that
is narrower than the first opening. In some of these embodiments,
the second opening receives the stopper when the pressing assembly
has traversed a length of the vessel.
[0051] Certain embodiments of the invention provide a container for
fluids. In some of these embodiments, the container has an
integrated filtration system. Some of these embodiments comprise a
substantially cylindrical vessel that has an inner surface, an
outer surface and an opening. Some of these embodiments comprise a
pressing assembly. In some of these embodiments, the pressing
assembly includes a stopper. In some of these embodiments, the
pressing assembly includes a filtration assembly. In some of these
embodiments, the pressing assembly includes a rod having a top end
that is attached to the stopper and a bottom end that is releasably
attached to the filtration assembly. Some of these embodiments
comprise a vessel top configured to receive the pressing assembly
such that the rod of the pressing assembly is slidably attached to
a bearing of the vessel top. In some of these embodiments, the
filtration assembly comprises a chamber that receives a filtration
element and a gasket that maintains a seal between the inner
surface of the vessel and an outer perimeter of the filtration
assembly. In some of these embodiments, the orientation of the rod
is controlled by the gasket and by the bearing. In some of these
embodiments, a chemical dissolved in the water stored in the vessel
is removed when the pressing assembly is forced through the
vessel.
[0052] In some of these embodiments, the vessel top has a first
opening that mates with the opening of the vessel and a second
opening that is narrower than the first opening, and wherein the
second opening receives the stopper when the pressing assembly has
traversed a predetermined length of the vessel. In some of these
embodiments, the filtration element comprises activated carbon. In
some of these embodiments, the filtration assembly receives one or
more pods that add a substance to water filtered by the filtration
element when the pressing assembly is forced through the vessel. In
some of these embodiments, the one or more pods include a pod that
adds a fruit essence to the water filtered by the filtration
element. In some of these embodiments, the one or more pods include
a pod that adds a nutrient to the water filtered by the filtration
element. In some of these embodiments, the nutrient comprises a
mineral.
[0053] In some of these embodiments, water filtered by the
filtration element when the pressing assembly is forced through the
vessel meets NSF/ANSI Standard 42. In some of these embodiments,
water filtered by the filtration element when the pressing assembly
is forced through the vessel meets NSF/ANSI Standard 53. In some of
these embodiments, the stopper includes a valve operated by a ring.
In some of these embodiments, the ring rotates about an axis of the
bottle between a first and second position. In some of these
embodiments, the valve is closed when the ring is in the first
position and open when the ring is in the second position. In some
of these embodiments, the ring is used to operate the pressing
assembly when oriented in the first position. In some of these
embodiments, the gasket comprises an element having a plurality of
fins. In some of these embodiments, the gasket comprises one or
more of a U ring and a V ring. In some of these embodiments, the
gasket comprises one or more of a chevron packing seal and an O
ring. In some of these embodiments, the container is a pitcher. In
some of these embodiments, the container is a bottle.
[0054] In some of these embodiments, the gasket is selected to
withstand a hydrostatic force of at least 1 pound per square inch.
In some of these embodiments, the gasket is selected to withstand a
hydrostatic force of at least 2 pounds per square inch. In some of
these embodiments, the gasket is selected to withstand a
hydrostatic force of at least 3 pounds per square inch. In some of
these embodiments, the gasket is selected to withstand a
hydrostatic force of at least 4 pounds per square inch. In some of
these embodiments, the gasket is selected to withstand a
hydrostatic force of at least 5 pounds per square inch. In some of
these embodiments, the gasket is selected to withstand a
hydrostatic force of at least 25 pounds per square inch.
[0055] Certain embodiments of the invention provide methods for
filtering water in a portable container such as those containers
described above. In some of these embodiments, the container has a
substantially cylindrical vessel. In some of these embodiments, the
container has a pressing assembly that includes a stopper connected
to a filter by a rod. Some of these embodiments comprise providing
a filter element within the filter for purifying water to at least
NSF/ANSI Standard 42. Some of these embodiments comprise providing
a body of water to be filtered within the vessel. Some of these
embodiments comprise inserting the filter element into a top
opening of the vessel. Some of these embodiments comprise pressing
the filter toward the bottom of the vessel using at least one of
the stopper and a portion of the rod to apply pressure to the
pressing assembly. In some of these embodiments, the pressing
causes the unfiltered water to pass through the filter, thereby
obtaining filtered water. In some of these embodiments, the
filtered water collects in an upper portion of the vessel. In some
of these embodiments, providing an opening through the stopper for
consumption of the filtered water. In some of these embodiments, a
gasket element attached to the filter prevents bypass of the filter
by unfiltered water.
[0056] In some of these embodiments, the filter element purifies
water to at least NSF/ANSI Standard 53. Some of these embodiments
comprise providing one or more pods within the filter. In some of
these embodiments, each of the one or more pods includes an
additive. In some of these embodiments, the additive comprises a
nutrient. In some of these embodiments, the additive comprises a
mineral. In some of these embodiments, the additive comprises a
flavor. In some of these embodiments, the step of pressing causes
the additive to be infused into the filtered water.
[0057] Although the present invention has been described with
reference to specific exemplary embodiments, it will be evident to
one of ordinary skill in the art that various modifications and
changes may be made to these embodiments without departing from the
broader spirit and scope of the invention. Accordingly, the
specification and drawings are to be regarded in an illustrative
rather than a restrictive sense.
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