U.S. patent application number 11/716327 was filed with the patent office on 2008-09-11 for fluid pack.
Invention is credited to Theodore P. Lillie.
Application Number | 20080217367 11/716327 |
Document ID | / |
Family ID | 39740626 |
Filed Date | 2008-09-11 |
United States Patent
Application |
20080217367 |
Kind Code |
A1 |
Lillie; Theodore P. |
September 11, 2008 |
Fluid pack
Abstract
A backpack is configured to be secured to a backside of a
wearer. An elongated fluid reservoir is disposed a generally
horizontal orientation in or on the backpack. The elongated fluid
reservoir has a horizontal-to-vertical elongation ratio of at least
about 2:1 and is positioned adjacent a hip region of a wearer. A
hip belt is configured to at least partially secure the backpack to
a wearer and is further configured to compress the generally
horizontally oriented elongated fluid reservoir against hips of a
wearer. A fluid delivery tube is operatively connected with the
elongated fluid reservoir to enable a wearer to selectively draw
fluid from the elongated fluid reservoir.
Inventors: |
Lillie; Theodore P.;
(Woodacre, CA) |
Correspondence
Address: |
Robert M. Sieg, Esq.;Fay, Sharpe, Fagan, Minnich & McKee, LLP
Seventh Floor, 1100 Superior Avenue
Cleveland
OH
44114-2579
US
|
Family ID: |
39740626 |
Appl. No.: |
11/716327 |
Filed: |
March 9, 2007 |
Current U.S.
Class: |
224/148.2 |
Current CPC
Class: |
A45F 3/047 20130101;
A45F 3/16 20130101; A45F 3/10 20130101 |
Class at
Publication: |
224/148.2 |
International
Class: |
A45F 3/10 20060101
A45F003/10 |
Claims
1. An apparatus comprising: a backpack configured to be secured to
a wearer, the backpack including a hip region that overlaps a hip
region of the wearer when the backpack is secured to the wearer; an
elongated fluid reservoir disposed in or on a hip region of the
backpack, the elongated fluid reservoir having a direction of
elongation oriented generally transverse to a spinal column of the
wearer when the backpack is secured to the wearer; and a hip belt
configured to secure the hip region of the backpack to a wearer and
to compress the elongated fluid reservoir against hips of a
wearer.
2. The apparatus as set forth in claim 1, wherein the elongated
fluid reservoir is shaped to overlap kidney regions of a wearer
whereby the elongated fluid reservoir provides protection for
kidney regions.
3. The apparatus as set forth in claim 1, wherein the elongated
fluid reservoir is shaped to overlap a liver region of a
wearer.
4. The apparatus as set forth in claim 1, wherein the backpack
comprises: shoulder straps configured to secure an upper portion of
the backpack to a wearer.
5. The apparatus as set forth in claim 1, wherein the backpack
comprises: a fanny pack including the hip region elongated
transverse to the vertical direction, the fanny pack not including
shoulder straps.
6. The apparatus as set forth in claim 1, further comprising: a
fluid delivery tube extending from the elongated fluid reservoir
and terminating in a bite valve.
7. The apparatus as set forth in claim 6, further comprising: a
retractable reel disposed in or on the backpack to bias the fluid
delivery tube toward retraction into the backpack.
8. The apparatus as set forth in claim 1, wherein the backpack
comprises: one or more storage compartments not configured to store
the elongated fluid reservoir.
9. The apparatus as set forth in claim 1, wherein the elongated
fluid reservoir has an elongation ratio of at least about 2:1.
10. The apparatus as set forth in claim 1, wherein the elongated
fluid reservoir has an elongation ratio of at least about 3:1.
11. A apparatus comprising: a backpack configured to be secured at
least to a hip region of a wearer; an elongated fluid reservoir
disposed in a generally horizontal orientation in or on the
backpack; and a hip belt configured to compress the generally
horizontally oriented elongated fluid reservoir against hips of a
wearer.
12. The apparatus as set forth in claim 11, further comprising: a
fluid delivery tube in fluid communication with the elongated fluid
reservoir; and a retractable reel disposed in or on the backpack
and configured to retract the fluid delivery tube.
13. The apparatus as set forth in claim 11, wherein the elongated
fluid reservoir extends at least partway along the hip belt to
provide protection to the lower torso against mechanical
impact.
14. The apparatus as set forth in claim 11, wherein the backpack
comprises: a hiking or backpacking backpack including shoulder
straps.
15. The apparatus as set forth in claim 11, wherein the hip belt
comprises: split elastic connection straps that produce stabilizing
vertically converging retention forces.
16. The apparatus as set forth in claim 11, wherein the backpack
comprises: a fanny pack that does not include shoulder straps.
17. The apparatus as set forth in claim 11, wherein the backpack
comprises: one or more storage compartments not configured to store
the elongated fluid reservoir.
18. The apparatus as set forth in claim 11, wherein the elongated
fluid reservoir has a horizontal-to-vertical elongation ratio of at
least about 2:1.
19. The apparatus as set forth in claim 11, wherein the elongated
fluid reservoir has a horizontal-to-vertical elongation ratio of at
least about 4:1.
20. A apparatus comprising: a backpack configured to be secured to
a backside of a wearer; an elongated fluid reservoir disposed in a
generally horizontal orientation in or on the backpack, the
elongated fluid reservoir having a horizontal-to-vertical
elongation ratio of at least about 2:1 and positioned adjacent a
hip region of a wearer; a hip belt configured to compress the
generally horizontally oriented elongated fluid reservoir against
hips of a wearer, the hip belt including split elastic connection
straps that produce stabilizing vertically converging retention
forces; and a fluid delivery tube operatively connected with the
elongated fluid reservoir to enable a wearer to selectively draw
fluid from the elongated fluid reservoir.
Description
BACKGROUND
[0001] The following relates to the personal hydration arts, such
as hydration packs, backpacks including fluid bladders, containers,
or reservoirs, or so forth.
[0002] A hydration pack is a fluid-carrying device used to carry
water, a sports drink, coffee, an alcoholic beverage, or another
consumable fluid during walking, backpacking, bicycling, hiking,
jogging, or other athletic activities. The hydration pack includes
a bladder or other fluid reservoir that is attached to the
associated person by straps or other fasteners. A fluid delivery
tube extends from the fluid reservoir, such as a fluid bladder,
fluid container, or so forth, and at the distal end includes a bite
valve or other mechanism to -selectively allow the person to drink.
In some hydration packs, the bite valve or other delivery mechanism
is configured to be readily accessed while performing rigorous
activity.
[0003] A typical hydration pack employs an elongated fluid
reservoir that is positioned vertically in a backpack substantially
centered, on the spine of the back, with the fluid delivery tube
connected at the bottom of the fluid reservoir. Such an arrangement
promotes efficient and complete delivery of all fluid in the
backpack, and also keeps weight centered on the spinal column.
However, existing hydration packs are problematic in that they have
a tendency to shift about during rigorous activity, which can tend
to unbalance the wearer or in extreme cases cause a fall or other
accident. In such a fall or accident, there is potential for
serious injury, including in some cases injury to the kidneys,
liver, or other vital organs.
SUMMARY
[0004] In at least one illustrated embodiment, a backpack is
configured to be secured to a wearer. The backpack includes a hip
region that overlaps a hip region of the wearer when the backpack
is secured to the wearer. An elongated fluid reservoir is disposed
in or on a hip region of the backpack. The elongated fluid
reservoir has a direction of elongation oriented generally
transverse to a spinal column of the wearer when the backpack is
secured to the wearer. A hip belt is configured to secure the hip
region of the backpack to a wearer and to compress the elongated
fluid reservoir against hips of a wearer.
[0005] In at least one illustrated embodiment, a backpack is
configured to be secured at least to a hip region of a wearer. An
elongated fluid reservoir is disposed in a generally horizontal
orientation in or on the backpack. A hip belt is configured to at
least partially secure the backpack to a wearer and is further
configured to compress the generally horizontally oriented
elongated fluid reservoir against hips of a wearer.
[0006] In at least one illustrated embodiment, backpack configured
to be secured to a backside of a wearer. An elongated fluid
reservoir is disposed a generally horizontal orientation in or on
the backpack. The elongated fluid reservoir has a
horizontal-to-vertical elongation ratio of at least about 2:1 and
is positioned adjacent a hip region of a wearer. A hip belt is
configured to compress the generally horizontally oriented
elongated fluid reservoir against hips of a wearer. The hip belt
includes split elastic connection straps that produce stabilizing
vertically converging retention forces. A fluid delivery tube is
operatively connected with the elongated fluid reservoir to enable
a wearer to selectively draw fluid from the elongated fluid
reservoir.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] FIGS. 1-3 show front, back, and side views, respectively, of
a backpack including a hydration system. The side view of FIG. 3
shows the backpack being worn by a wearer.
[0008] FIG. 4 shows a front view of the hydration pack of FIGS.
1-3, with the front cover removed to reveal internal features of
the backpack.
[0009] FIG. 5 shows a back view of the harness of the backpack of
FIGS. 1-3.
[0010] FIG. 6 shows an enlarged view of the adjustable hip belt of
the backpack of FIGS. 1-5.
[0011] FIG. 7 shows a front view of a modified backpack.
[0012] FIG. 8 shows a front view of a hydration system configured
as a fanny pack.
[0013] FIG. 9 shows the hydration system of FIG. 8 with the front
cover removed to reveal internal features of the hydration
system.
[0014] FIG. 10 shows an enlarged view of an alternative adjustable
hip belt suitably substituted for the hip belt of FIG. 6.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0015] With reference to FIG. 1-5, an example backpack 10 is worn
by a wearer W. The term "wearer" refers to a person wearing a
backpack including a hydration system. The wearer is not part of
the backpack or part of the hydration system. The term "backpack"
as used herein is intended to encompass any pack that is worn on
the backside of a wearer. The term "backpack" as used herein is
intended to encompass, for example, a conventional backpack
including shoulder straps and a hip belt for securing to the
wearer, or a fanny pack, or a lumbar pack, or so forth.
[0016] With continuing reference to FIGS. 1-5, the example backpack
10 includes a back side 12 configured to rest against a wearer's
back, and a front cover 14. The back side 12 and front cover 14 are
operatively connected to define a generally hollow region
therebetween for containing items. In the example embodiment
illustrated in FIGS. 1-5, an upper portion of the generally hollow
region is configured as a main pocket 16 for containing items, and
is accessible via a main zipper 18 or other selectively sealable
opening. Optionally, the main pocket includes one or more internal
pockets 20 for organizing, separating, or otherwise arranging
stored times. In the illustrated embodiment, one such pocket 22 is
configured for storing a portable music player (not shown), such as
an MP3 player, and a small opening 24 (see FIG. 1) is provided in
the front cover 14 via which a headphone cable of the portable
music player may extend. The backpack 10 optionally further
includes other features for attaching or storing items, such as
D-ring connectors 26 for tying or otherwise securing items, a lower
zipper 28 for accessing a small lower gear compartment, or so
forth. The area of the back side 12 of the backpack 10 that
contacts the wearer's back typically includes a soft padding
material to provide padding and enhance comfort. As shown in FIG.
3, the backpack 10 is configured to be secured to the wearer W, and
when so secured has generally bilateral symmetry with respect to a
spinal column S (diagrammatically indicated by a heavy dotted line
in FIGS. 1-5) of the wearer W.
[0017] The example backpack 10 further includes an example
hydration system. A bladder or other fluid reservoir 30 is disposed
in a lower portion of the generally hollow region between the back
side 12 and the front cover 14, that is, in a hip region 32 of the
backpack 10 that overlaps a hip region H of the wearer W. The fluid
reservoir 30 is an elongated fluid reservoir 30 having a direction
of elongation 34 oriented generally transverse to the spinal column
S of the wearer W when the backpack 10 is secured to the wearer W.
The fluid reservoir 30 may be secured in the backpack 10 in various
ways, such as being sewn to an interior wall of the backpack 10, or
disposed in a conformably sized pocket or other compartment of the
backpack 10, or so forth. It is also contemplated for the fluid
reservoir 30 to be integrally formed into the backpack 10, for
example being defined by a sealed water-tight integral compartment
of the backpack 10. In some embodiments, the fluid reservoir 30 is
permanently secured in the backpack 10, while in other embodiments
the fluid reservoir 30 is removably secured or stored in the
backpack 10. A removable arrangement has certain advantages such as
facilitating cleaning of the fluid reservoir 30, replacement of the
fluid reservoir 30, or so forth. A permanently secured arrangement
may have certain manufacturing and cost advantages.
[0018] The arrangement of the elongated fluid reservoir 30 in the
hip region 32 with the direction of elongation 34 oriented
generally transverse to the spinal column S advantageously lowers
an overall center of gravity (diagrammatically indicated in FIG. 4
by a diagrammatic symbol 36 for the case of the fluid reservoir 30
being fully filled with fluid) of the wearer W, and operatively
mechanically joins the elongated fluid reservoir 30 with the body
of the wearer W so that the fluid reservoir 30 moves with the body
of the wearer W during rigorous activities such as downhill or
free-ride mountain biking, MotoCross, snowboarding, rock climbing,
jogging, running, skating, horse riding, or so forth. In contrast,
existing hydration systems typically have the fluid reservoir
oriented parallel with the spinal column, which typically results
in a higher overall center of gravity and an undesirable tendency
toward side-to-side movement of the fluid reservoir with strenuous
activity. A high center of gravity and tendency toward side-to-side
movement can unbalance the wearer and can lead to back strain,
fatigue, discomfort, degraded balance, falling, and so forth.
[0019] The illustrated elongated fluid reservoir 30 is kept in the
desired central location with the direction of elongation 34
oriented generally transverse to the spinal column S of the wearer
W by an illustrated hook-and-loop bladder locator arrangement 40
securing an elastic containment mesh (not shown) surrounding the
fluid reservoir 30, or by another fastening mechanism. The fluid
reservoir 30 is fillable and refillable via a threaded fill cap 42
that can be screwed onto or unscrewed off of a mating coupling (not
shown) of the fluid reservoir 30. The illustrated fluid reservoir
30 is accessible for removal or installation via an interior
elasticized opening 43 and outer zippered access openings 44, 45.
Velcro, buttoned, or otherwise configured access openings may also
be used, and the number of openings may range between one access
opening, two access openings, or more access openings. In some
embodiments, the fluid reservoir may be permanently secured in the
backpack, in which case no access openings may be provided except
for some coupling for filling.
[0020] A fluid delivery tube 50 extends from the fluid reservoir
30, an terminates in a bite valve 52 or other mechanism for
selectively allowing the wearer W to sip or otherwise draw fluid
from the fluid reservoir 30. The illustrated fluid delivery tube 50
is coupled with the elongated fluid reservoir 30 at a bottom of the
fluid reservoir 30 using a pivoting tube coupling 54 such as a ball
bearing-type coupling. This arrangement advantageously allows the
fluid delivery tube 50 to extend over the right side of the wearer
W (as shown for example in FIG. 3) or over the left side of the
wearer, as well as the ability to route the tube under either the
left or right arm. The illustrated fluid delivery system 50, 52, 54
is an example. In other embodiments, for example, the fluid
delivery tube may extend from a dedicated side of the elongated
fluid reservoir, such as from a right end of the elongated fluid
reservoir.
[0021] The backpack may be secured to the wearer in various ways.
The illustrated backpack 10 includes a shoulder harness 60 depicted
in FIG. 5 and shown in part in FIGS. 1 and 2. The shoulder harness
60 includes adjustable shoulder straps 62 secured to the shoulders
of the wearer W (see FIG. 3) and including strap couplings 64 that
connect with straps 66 that support the upper portion of the
backpack 10. The hip region 32 of the backpack 10 that overlaps the
hip region H of the wearer W is secured by an adjustable hip belt
70. Additional securing mechanisms may be provided, such as an
optional adjustable chest tightening strap 72 (shown only in FIG.
5) arranged across the chest to tighten the shoulder straps. The
adjustable hip belt 70 advantageously cinches the hip region 32 of
the backpack 10, including the elongated fluid reservoir 30, to the
hip region H of the wearer W to ensure that the fluid reservoir 30
is operatively mechanically joined with the hip region H of the
wearer W so that the fluid reservoir 30 moves with the body of the
wearer W during rigorous activities. Additionally, the positioning
of the elongated fluid reservoir 30 around at least the back
portion of the hip region H provides protection of vital organs
such as the kidneys and liver in the event that the wearer W does
fall or suffers some other sudden impact to the lower torso region.
Indeed, in some embodiments, it is contemplated for the elongated
fluid reservoir to be further elongated to so as to extend along
the hip belt 70 over to the front-side of the wearer W so as to
provide protection for the front portion of the lower torso as
well.
[0022] With reference to FIG. 6, one suitable embodiment of the hip
belt 70 includes elastic connection straps 76 connected to the
backpack 10. The hip belt optionally includes a size adjustment for
accommodating a larger or smaller wearers. The illustrated hip belt
70 includes an elastic hip adjustment strap 78 with a hook-and-loop
attachment 80 that connects with a side strap that includes a
canvas or mesh side strap portion 82 and a Nylon webbing portion
84. The side strap terminates in a buckle 86 or other fastener. The
elastic nature of the hip belt 70, provided in the illustrated
embodiment by the elastic connection straps 76, advantageously
allows the backpack 10 to be maintained snug against the wearer's
body without being locked into a tight position, so as to allow the
position of the fluid reservoir 30 to elastically flex and move
with the body instead of on its own trajectory. The splitting of
the elastic connection straps 76 into upper and lower straps, as
shown in FIG. 6, creates vertically converging retention forces F1,
F2 (indicated diagrammatically by arrows in FIG. 6) that are
believed to advantageously help stabilize the elongated fluid
reservoir 30 against the back of the wearer. The illustrated hip
belt 70 is an example, and other configurations are contemplated
for providing elasticity, including configurations that do not
include the illustrated split elastic connection straps 76. While
the illustrated hip belt 70 is elastic, it is also contemplated to
substitute an inelastic hip belt for the illustrated elastic hip
belt 70. The hip belt may be adjustable, as in the case of the
illustrated hip belt 70 having the elastic hip adjustment strap 78
and hook-and-loop attachment 80, or may be non-adjustable. It is
contemplated to provide different elastic or inelastic hip belt
sizes (e.g., different lengths) to accommodate different wearer
sizes, e.g. a "small", "medium", "large", "extra-large" or other
size configuration.
[0023] With reference to FIG. 7, a front view of a modified
backpack 10' is shown. The modified backpack 10' is similar to the
backpack 10 of FIGS. 1-6, except that the elongated fluid reservoir
30 is replaced by a modified elongated fluid reservoir 30' (outline
shown in phantom by dashed lines in FIG. 7) that, in addition to
being elongated along the direction of elongation 34, also extends
upwards partway. In effect, the backpack 10' trades off a reduction
in storage space in the upper compartment for the larger-capacity
elongated fluid reservoir 30'. The general elongation of the fluid
reservoir 30' in the direction of elongation 34 provides an
advantageously lowered center of gravity 36', which however is not
as lowered as the center of gravity 36 of the fluid reservoir 30
due to the additional upward extension portion of the fluid
reservoir 30'. However, it will be noted that the indicated center
of gravity 36' corresponds to a relatively high diagrammatically
indicated fluid level L of the fluid reservoir 30'. As the fluid is
consumed by the wearer, the fluid level will rapidly drop (due to
the narrowness of the upward extension of the fluid reservoir 30',
so that the indicated center of gravity 36' will drop toward the
center of gravity 36 of the fluid reservoir 30. The illustrated
elongated fluid reservoirs 30, 30' are examples, and other fluid
reservoirs can be used with other configurations that include
substantial elongation in the direction of elongation 34 generally
transverse to the spinal column S of the wearer W.
[0024] With reference to FIGS. 8 and 9, an example hydration system
configured as a fanny pack 110 is disclosed. A generally hollow
elongated containment pack 112 contains the elongated fluid
reservoir 30 that is elongated along the direction of elongation 34
generally transverse to the spinal column S, as in the backpack
embodiment 10. The elongated fluid reservoir 30 is accessible for
removal or installation via the outer zippered access openings 44,
45. The containment pack 112 and elongated fluid reservoir 30
overlap the hip region H of the wearer W is are secured thereto by
the adjustable hip belt 70, again as in the backpack embodiment 10.
The fanny pack 110 does not include the upper storage compartment
or internal pockets 20, 22. Rather, the illustrated fanny pack 110
contains only the fluid reservoir 30. A fanny pack such as the
illustrated fanny pack 110 further provided with one or more small
compartments (not shown) for storage of keys or other small items
is also contemplated.
[0025] The illustration of the fanny pack 110 in FIG. 9 shows
details of the connection of the drinking tube 50 to the elongated
fluid reservoir 30. A threaded fill cap 142 is included that is
similar to the fill cap 42 of the backpack 10. The connection
configuration shown in FIG. 9 includes a retractable reel 144 that
retracts and extends the fluid delivery tube 50 to allow a user to
pull and extend the bite valve 52 from the hip of the wearer to the
wearer's mouth then have it retract back to the hip when not in
use. The illustrated retractable reel 144 is a spring-biased
retractable reel that is built into the fill cap 142, and includes
a 90.degree. elbow 146 and a swiveling ball bearing 148 allowing
the connected drinking tube 50 to rotate into either left-hand or
right-hand output positions. Semi-automated "roll-up" type
retraction is provided by a biasing spring 150, similar to a key
lanyard, while the tube is withdrawn against the biasing spring
force by pulling on the portion of the drinking tube 50 that
extends out of the containment pack 112. In some embodiments, the
biasing spring 150 is configured similarly to a circular watch-type
spring to roll the drinking tube 50 onto a spindle (not shown)
while still allowing fluid to be drawn seamlessly from the fluid
reservoir 30 by sucking on the bite valve 52. The illustrated
retractable reel 144 is an example, and more generally
substantially any type of retractable reel can be used to keep the
drinking tube 50 inside the containment pack 112 except when
temporarily reeled or drawn out by the user to drink. Using a
retractable reel for the fluid delivery tube 50 advantageously
keeps the drinking tube 50 stowed when not in use, so that the
drinking tube 50 does not impede the user when engaging in
strenuous activity. Moreover, although the retractable reel 144 is
illustrated in FIG. 9 in conjunction with the fanny pack-type
hydration system 110 of FIG. 9, it is to be understood that the
illustrated retractable cord 144, or another suitable retractable
reel, is advantageously integrated into substantially any type of
hydration pack, including the illustrated backpack-type hydration
packs 10, 10' or substantially any other type of hydration pack.
The illustrated retractable reel is disposed inside the containment
pack 112, which advantageously protects it from damage from
exposure to the elements. However, it is also contemplated to
dispose the retractable reel outside of the containment pack or
backpack, such a configuration having the advantage of facilitating
repair in the field of the tube gets tangled up with the
retractable reel.
[0026] With reference to FIG. 10, the configuration of the hip belt
can substantially affect the comfort and security of the fastening,
and impacts the wearer's comfort. FIG. 10 shows a hip belt 70' that
is optionally substituted for the hip belt 70 shown in FIG. 6. The
hip belt 70' of FIG. 10 includes the split elastic connection
straps 76, hook-and-loop attachment 80, canvas or mesh side strap
portion 82, and Nylon webbing portion 84 as in the hip belt 70 of
FIG. 6. However, the elastic hip adjustment strap 78 of the hip
belt 70 is replaced in the hip belt 70' by an inelastic and
narrower sewn connection 78' that provides more play for making the
hip adjustment. The split connection straps 76 are typically
elastic; however, it is also contemplated to employ inelastic
connection straps. The shape or curvature of the cover 14 in the
vicinity of attachment to the split connection straps 76 can also
be tailored for enhanced comfort for specific sizes and body
characteristics of the wearer.
[0027] The illustrated embodiments are examples. It will be
appreciated that the disclosed hydration systems including
elongated fluid reservoirs elongated in the direction generally
transverse to the spinal column are readily incorporated into
substantially any sort of backpack, including backpacks for hiking
or backpacking that have internal frames, backpacks for hiking or
backpacking that have external frames, lightweight daypacks that
include a hip belt, fanny packs, lumbar packs, and so forth. Such a
backpack can be dedicated solely to supporting the hydration system
(as for example is the case for the fanny pack 110 of FIGS. 8 and
9) or may additionally include compartments or pockets for storing
or carrying other items (as for example is the case for the
backpacks 10, 10' of FIGS. 1-7). Advantages of such an elongated
fluid reservoir are many, including but not limited to better
ergonomic design for rigorous activities, lowered center of
gravity, improved balance, fluid-based protection for internal
organs of the lower torso such as kidneys and the liver, and so
forth.
[0028] The elongation of the elongated reservoir 30, 30' should be
sufficient to provide the desired lowered center of gravity. In
some embodiments, the elongated fluid reservoir 30, 30' has an
elongation ratio of at least about 2:1. In some embodiments, the
elongated fluid reservoir 30, 30' has a horizontal-to-vertical
elongation ratio (that is, a ratio of length in the direction of
elongation 34 to a length in the direction transverse to
elongation) of at least about 3:1. In some embodiments, the
elongated fluid reservoir 30, 30' has a horizontal-to-vertical
elongation ratio of at least about 4:1. Generally, an increased
elongation ratio provides a lower center of gravity and increased
protection of the lower torso through distribution of more liquid
around the lower torso. However, if the elongation ratio is
increased to a large value, the fluid capacity may be compromised.
An arrangement such as that of the fluid reservoir 30' in which
only a central portion of the fluid reservoir extends in the
vertical direction (that is in the direction generally transverse
to the direction of elongation 34) can provide increased fluid
capacity in a smaller elongation ratio with reduced impact on the
position of the center of gravity.
[0029] The invention' has been described with reference to the
preferred embodiments. Obviously, modifications and alterations
will occur to others upon reading and understanding the preceding
detailed description. It is intended that the invention be
construed as including all such modifications and alterations
insofar as they come within the scope of the appended claims or the
equivalents thereof.
* * * * *