U.S. patent application number 14/102314 was filed with the patent office on 2015-06-11 for backpack external frame and suspension system.
The applicant listed for this patent is Patrick Smith. Invention is credited to Patrick Smith.
Application Number | 20150157115 14/102314 |
Document ID | / |
Family ID | 53269861 |
Filed Date | 2015-06-11 |
United States Patent
Application |
20150157115 |
Kind Code |
A1 |
Smith; Patrick |
June 11, 2015 |
BACKPACK EXTERNAL FRAME AND SUSPENSION SYSTEM
Abstract
A backpack including an external frame is provided. The external
frame may include a pair of upright members and a pair of cross
members. The cross members may extend transversely to, and may be
attached to, the pair of upright members. The upright members and
the cross members may be constructed of a laminate structure having
layers of carbon fiber and wood, resulting in a lightweight, yet
strong, frame.
Inventors: |
Smith; Patrick; (Golden,
CO) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Smith; Patrick |
Golden |
CO |
US |
|
|
Family ID: |
53269861 |
Appl. No.: |
14/102314 |
Filed: |
December 10, 2013 |
Current U.S.
Class: |
224/633 ;
29/428 |
Current CPC
Class: |
Y10T 29/49826 20150115;
A45F 3/047 20130101; A45F 3/04 20130101; A45F 3/08 20130101 |
International
Class: |
A45F 3/08 20060101
A45F003/08 |
Claims
1. A backpack comprising: an external frame including a pair of
upright members and a pair of cross members extending transversely
to and attached to the pair of upright members; wherein the pair of
upright members and the pair of cross members are constructed of a
laminate structure having layers of carbon fiber and wood.
2. The backpack of claim 1, further comprising a sleeve positioned
around each of the pair of upright members and extending along a
majority of the length of the pair of upright members.
3. The backpack of claim 2, wherein each sleeve is attached to its
respective upright member by the attachment of the pair of cross
members to the pair of upright members.
4. The backpack of claim 2, further comprising a torso pad attached
to each sleeve.
5. The backpack of claim 4, wherein each torso pad is pivotable
relative to the pair of upright members.
6. The backpack of claim 4, further comprising a shoulder strap
attached to each sleeve.
7. The backpack of claim 6, wherein a portion of each shoulder
strap is slideably retained between a respective torso pad and
sleeve.
8. The backpack of claim 1, further comprising a waist belt having
an intermediate segment and a pair of padded end segments extending
outwardly from the intermediate segment, wherein the intermediate
segment defines a pair of pockets that receive lower ends of the
pair of upright members.
9. The backpack of claim 8, further comprising a lumbar pad
attached to one of the pair of cross members, folded around the
intermediate segment of the waist belt, and attached to the pair of
upright members to laterally and vertically restrain the waist belt
relative to the external frame by maintaining the lower ends of the
pair of upright members in the pair of pockets.
10. The backpack of claim 9, wherein the lumbar pad is thicker than
the pair of padded end segments of the waist belt.
11. The backpack of claim 1, wherein: the pair of cross members
comprises an upper cross member and a lower cross member spaced
apart from the upper cross member; and the pair of upright members
converge toward one another as the pair of upright members extend
downwardly from the upper cross member to the lower cross
member.
12. The backpack of claim 11, wherein the pair of upright members
extend above the upper cross member to facilitate attachment of a
bag to the external frame.
13. The backpack of claim 11, wherein the pair of upright members
extend below the lower cross member to facilitate attachment of a
waist belt to the external frame.
14. The backpack of claim 1, wherein the pair of upright members
have curved profiles.
15. The backpack of claim 1, wherein the pair of upright members
and the pair of cross members have rectangular cross sections.
16. The backpack of claim 1, wherein the pair of upright members
and the pair of cross members are attached together by four
one-degree-of-freedom joints to permit relative lateral movement of
the external frame.
17. The backpack of claim 1, wherein the external frame is narrower
in width than a wearer's back.
18. A method of assembling a backpack having an external frame and
a suspension system, the method comprising: positioning a sleeve
having a closed end and an open end over an upright member of the
external frame; positioning a cross member of the external frame
transversely to the upright member such that a portion of the
sleeve extends between the cross member and the upright member; and
attaching the cross member to the upright member such that the
sleeve is trapped between the cross member and the upright
member.
19. The method of claim 18, wherein the upright member and the
cross member are constructed of a laminate structure having layers
of carbon fiber and wood.
20. The method of claim 18, further comprising attaching a torso
pad to the sleeve such that the torso pad is pivotable relative to
the upright member.
Description
FIELD
[0001] The present disclosure relates to an external frame and
suspension system for a backpack.
BACKGROUND
[0002] Backpacks generally fall into one of three categories:
frameless, external frame, and internal frame. External and
internal frames generally serve to support a load and distribute
the weight of the load across the wearer's body. External frames
generally are designed to carry heavier loads and thus provide the
wearer more support and better weight distribution than internal
frames or frameless packs. However, the increased strength of
external frames generally increases the weight of external
frames.
SUMMARY
[0003] Examples of the disclosure may include a backpack. In some
examples, the backpack includes an external frame. The external
frame may include a pair of upright members (or stays) and a pair
of cross members (or stays). The pair of cross members may extend
transversely to, and may be attached to, the pair of upright
members. The pair of upright members and the pair of cross members
may be constructed of a laminate structure having layers of carbon
fiber and wood. The laminate structure of the pair of upright
members and the pair of cross members may provide advantages
relative to conventional external frames. For example, the laminate
structure of the upright members and the cross members may result
in significant weight savings relative to conventional external
frames, without sacrificing strength.
[0004] The backpack may include a sleeve positioned around each
upright member of the pair of upright members. The pair of sleeves
may extend along a majority of the length of the pair of upright
members. Each sleeve may be attached to a respective upright member
by the attachment of the pair of cross members to the pair of
upright members.
[0005] The backpack may include a torso pad attached to each
sleeve. Each torso pad may be moveable relative to the pair of
upright members. For example, each torso pad may be pivotable,
laterally translateable, or both relative to the pair of upright
members.
[0006] The backpack may include a shoulder strap attached to each
sleeve. A portion of each shoulder strap may be slideably retained
between a respective torso pad and sleeve. Each shoulder strap may
include padded section for contact against a shoulder of a
wearer.
[0007] The backpack may include a waist belt removeably attached to
the pair of upright members. The waist belt may include an
intermediate segment and a pair of padded end segments extending
outwardly from the intermediate segment. The intermediate segment
may define a pair of pockets that receive lower ends of the pair of
upright members.
[0008] The backpack may include a lumbar pad attached to one of the
pair of cross members. The lumbar pad may be folded around the
intermediate segment of the waist belt and may be attached to the
pair of upright members to vertically restrain the waist belt
relative to the external frame. The lumbar pad may laterally
restrain the waist belt relative to the external frame by
maintaining lower ends of the pair of upright members in the pair
of pockets. The lumbar pad may be thicker than the pair of padded
end segments of the waist belt.
[0009] The pair of cross members may include an upper cross member
and a lower cross member spaced apart from the upper cross member.
The pair of upright members may converge toward one another as the
pair of upright members extends downwardly from the upper cross
member to the lower cross member. The pair of upright members may
extend above the upper cross member to facilitate attachment of a
bag to the external frame. The pair of upright members may extend
below the lower cross member to facilitate attachment of a waist
belt to the external frame. The external frame may be narrower in
width than a wearer's back. The pair of upright members may have
curved profiles. The pair of upright members and the pair of cross
members may have rectangular cross sections and may be referred to
as bars. The pair of upright members and the pair of cross members
may be attached together by four, one-degree-of-freedom joints to
permit relative lateral movement of the external frame.
[0010] Examples of the disclosure may include a method of
assembling a backpack having an external frame and a suspension
system. In some examples, the method includes positioning a sleeve
having a closed end and an open end over an upright member of the
external frame, positioning a cross member of the external frame
transversely to the upright member such that a portion of the
sleeve extends between the cross member and the upright member, and
attaching the cross member to the upright member such that the
sleeve is trapped between the cross member and the upright member.
The upright member and the cross member may be constructed of a
laminate structure having layers of carbon fiber and wood. The
method may include attaching a torso pad to the sleeve such that
the torso pad is pivotable relative to the upright member.
[0011] This summary of the disclosure is given to aid
understanding, and one of skill in the art will understand that
each of the various aspects and features of the disclosure may
advantageously be used separately in some instances, or in
combination with other aspects and features of the disclosure in
other instances. Accordingly, while the disclosure is presented in
terms of examples, it should be appreciated that individual aspects
of any example can be claimed separately or in combination with
aspects and features of that example or any other example. The
present disclosure is set forth in various levels of detail in this
application and no limitation as to the scope of the claimed
subject matter is intended by either the inclusion or non-inclusion
of elements, components, or the like in this summary.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The accompanying drawings, which are incorporated in and
constitute a part of the specification, illustrate examples of the
disclosure and, together with the general description given above
and the detailed description given below, serve to explain the
principles of these examples.
[0013] FIG. 1 is a perspective view of an example backpack.
[0014] FIG. 2 is a side elevation view of the backpack of FIG.
1.
[0015] FIG. 3 is an exploded view of the backpack of FIG. 1.
[0016] FIG. 4 is a perspective view of an example external frame
with sleeves positioned around the upright members of the
frame.
[0017] FIG. 5 is an enlarged view of an intersection of an upright
member and a cross member of the external frame of FIG. 4 taken
along the detail line 5-5 illustrated in FIG. 4.
[0018] FIG. 6 is a cross-section view of the intersection of the
upright member and the cross member of FIG. 5 taken along the line
6-6 illustrated in FIG. 5.
[0019] FIG. 7 is a schematic view of a laminate structure of the
upright members, the cross members, or both of the external frame
FIG. 3.
[0020] FIG. 8 is a cross-section view of a torso pad of the
backpack of FIG. 1 taken along the line 8-8 illustrated in FIG.
2.
[0021] FIG. 9 is a schematic cross-sectional view of the torso pads
of the backpack of FIG. 1 pivoted into alignment with a contour of
a wearer's back.
[0022] FIG. 10 is a partial cross-sectional view of a lumbar pad of
the backpack of FIG. 1.
[0023] FIG. 11 is a cross-section view of the lumbar pad of FIG. 10
taken along the line 11-11 illustrated in FIG. 15.
[0024] FIG. 12 is a perspective view of the backpack of FIG. 1 with
a chair removeably attached to the upright members and to the
lumbar pad.
[0025] FIG. 13A is a schematic view of a common loop and a
three-bar slider prior to attachment to one another.
[0026] FIG. 13B is a schematic view of the common loop and the
three-bar slider of FIG. 15 removeably attached to one another.
[0027] FIG. 14 is a fragmentary, perspective view of a bag
positioned onto upper ends of the external frame of FIG. 4.
[0028] FIG. 15 is a rear elevation view of the backpack of FIG. 1
situated on a wearer's back.
[0029] In certain instances, details that are not necessary for an
understanding of the disclosure or that render other details
difficult to perceive may have been omitted. In the appended
drawings, similar components and/or features may have the same
reference label. It should be understood that the claimed subject
matter is not necessarily limited to the particular examples or
arrangements illustrated herein.
DETAILED DESCRIPTION
[0030] Referring to FIGS. 1-3, a backpack 100 including an external
frame 102 and a suspension system 104 is provided. The external
frame 102 generally serves to support a load and, along with the
suspension system 104, to distribute most of the weight of the load
to the wearer's hips and legs, thereby improving the wearer's
ability to carry heavy loads and increasing the agility and balance
of the wearer when carrying the load. The external frame 102 and
suspension system 104 generally disperse the load onto the skeletal
structure of the wearer in a balanced way, thereby reducing or
eliminating forward, aft, right, or left forces on the wearer's
body so as to not disturb the wearer's natural posture, balance,
and movement.
[0031] Referring to FIGS. 3 and 4, the external frame 102 may
include four frame members or stays: a pair of upright members 106,
108 and a pair of cross members 110, 112. The upright members 106,
108, also referred to as upright stays, may be spaced laterally
apart from one another and may extend upwardly along a wearer's
back 114 (see FIG. 15). The cross members 110, 112, also referred
to as cross stays, may be spaced vertically apart from one another
and may extend laterally across a wearer's back 114. The cross
members 110, 112 may extend transversely to the upright members
106, 108 and may be positioned rearwardly of the upright members
106, 108 relative to the wearer. An upper cross member 110 may be
positioned proximate to upper ends 106a, 108a of the upright
members 106, 108 (see FIG. 4). A lower cross member 112 may be
positioned proximate to the lower ends 106b, 108b of the upright
members 106, 108. As shown in FIG. 4, the lower cross member 112
may be spaced vertically above the lower ends 106b, 108b of the
upright members 106, 108 such that the upright members 106, 108
extend below the lower cross member 112 for attachment to a waist
belt, which will be discussed in more detail below.
[0032] The cross members 110, 112 may be attached to the upright
members 106, 108 at the intersection of the cross members 110, 112
and the upright members 106, 108. With specific reference to FIGS.
4-6, a single fastener 116, e.g., a rivet, may be used at each
intersection to attach the cross members 110, 112 to the upright
members 106, 108, thus permitting slight angular movement between
the upright members 106, 108 and the cross members 110, 112. As
such, the frame 102 may be slightly skewed from side-to-side by a
load attached to the external frame 102. Although not shown, more
than one fastener may be used at each intersection to provide a
more rigid connection between the cross members 110, 112 to the
upright members 106, 108.
[0033] Referring to FIGS. 3 and 4, the external frame 102 may
resemble an inverted trapezoid when viewed from the front or rear.
The upright members 106, 108 may converge toward one another as the
upright members 106, 108 extend downwardly from the upper cross
member 110 to the lower cross member 112. In other words, the
external frame 102 may taper in width from an upper end of the
frame 102 to a lower end of the frame 102. With reference to FIG.
15, the uprights may be positioned farther apart from one another
near the shoulder region of a wearer's back and may be positioned
closer to one another near the lumbar region of the wearer's back.
In other words, the upright members 106, 108 may converge toward
one another as the upright members 106, 108 extend downwardly from
the shoulder region toward the wearer's hips, thereby transferring
the load to the wearer's hips and legs. Although in FIGS. 3 and 4
the external frame 102 has a linear taper from the upper end of the
frame to the lower end of the frame when viewed from the front or
rear, in some implementations the external frame 102 may have a
non-linear taper when viewed from the front or rear.
[0034] To accommodate the larger width of the upper end 102a of the
frame 102, the upper cross member 110 may be longer than the lower
cross member 112. The upper and lower cross members 110, 112 may
extend parallel or substantially parallel to one another. The upper
cross member 110 may form acute interior angles with the upright
members 106, 108, and the lower cross member 112 may form obtuse
interior angles with the upright members 106, 108.
[0035] Referring to FIGS. 1-4, the external frame 102 may have a
curvilinear profile when viewed from the side. The upright members
106, 108 may have an S-shaped profile that corresponds to a profile
of the wearer's back 114. The profile of the upright members 106,
108 may be customized to accommodate various back profiles, such as
a flat back or a standard-curved back. The cross members 110, 112
may have a rectilinear profile and extend in a straight line
between the upright members 106, 108.
[0036] The cross members 110, 112 and the upright members 106, 108
of the external frame 102 may be constructed of bars, rods, tubes,
or other members having various cross-sectional profiles. With
reference to FIGS. 5 and 6, the cross members 110, 112 and the
upright members 106, 108 may be constructed of bars having
rectangular cross-sections. In such examples, the cross members
110, 112 and the upright members 106, 108 may be referred to as
cross bars and upright bars, respectively. The cross members 110,
112 and the upright members 106, 108 may have identical or
substantially identical cross-sectional dimensions. In some
implementations, the cross members 110, 112 and the upright members
106, 108 have cylindrical cross-sections, oval cross-sections,
trapezoidal cross-sections, or other suitable cross-sectional
shapes.
[0037] The cross members 110, 112 and the upright members 106, 108
of the external frame 102 may be constructed of carbon fiber,
laminate, metal (e.g., aluminum), plastic, wood, or other suitable
materials. Referring to FIG. 7, the external frame 102 may be
constructed of a composite or laminate of carbon fiber and wood
that is lightweight, yet provides high strength, thereby reducing
the weight of the external frame 102 relative to conventional
external frames 102 without sacrificing strength. The upright
members 106, 108 and the cross members 110, 112 may be formed of
the laminate structure. Referring to FIG. 7, the upright members
106, 108 and the cross members 110, 112 may include multiple layers
of wood flanked by layers of carbon fiber. In some implementations,
the upright members 106, 108 and the cross members 110, 112 include
three layers of wood C, E, G stacked on top of one another and
attached together with thermoplastic resin layers D, F. Carbon
fiber layers A, I may be attached to outer surfaces of the outer
wood layers C, G with thermoplastic resin layers B, H, which may be
reinforced for increased stiffness. The thermoplastic resin layers
B, H may include one ply of ninety-degree unidirectional fiberglass
impregnated thermoplastic resin. The carbon fiber layers A, I may
be constructed of two plies of unidirectional carbon fiber, which
may be rotated ninety degrees relative to one another. The wood
layers C, E, G may be formed of maple veneer or other suitable
types of wood.
[0038] The wood layers C, E, G may be thicker than the carbon fiber
layers A, I. For example, in some implementations, the wood layers
C, E, G are 0.0625 inches in thickness and the carbon fiber layers
A, I are 0.009 inches in thickness. The thermoplastic resin layers
B, D, F, H may be the same thickness as the carbon fiber layers A,
I. For example, in the above-noted implementations, the
thermoplastic resin layers B, D, F, H may have a thickness of 0.009
inches. Although two layers of carbon fiber A, I and three layers
of wood C, E, G are illustrated, the frame 102 may include more or
less layers of carbon fiber and wood based on the desired strength
and weight characteristics of the frame 102.
[0039] The laminate structure of the upright members 106, 108 and
the cross members 110, 112 of the external frame 102 may provide
advantages relative to conventional external frames. For example,
the laminate structure of the frame members 106, 108, 110, 112 may
result in significant weight savings relative to conventional
external frames, without sacrificing strength. In some
implementations, the external frame 102 with the laminate structure
has about ten percent reduced weight relative to conventional
external frames, yet is capable of supporting as much or more load
relative to conventional external frames.
[0040] Referring to FIGS. 1-3, a suspension system 104 may be
attached to the external frame 102. The suspension system generally
includes a system of straps and padding that softens the contact
between the frame 102 and the wearer's back and provides attachment
points for a bag or other items. The suspension system 104 may
include a pair of sleeves 118, 120, a pair of torso pads 122, 124,
a pair of shoulder straps 126, 128, a lumbar pad 129, and a waist
belt 130. The suspension system 104 generally transfers the load to
the wearer through the waist belt 130, leaving the shoulder straps
126, 128 primarily for stabilizing the load. Most of the weight is
therefore taken off the wearer's shoulders, reducing the chance of
injury from shoulder strap pressure, as well as being less
restrictive of the wearer's upper body range of motion.
[0041] The pair of sleeves 118, 120 may be positioned around the
pair of upright members 106, 108 and extend along a majority of the
length of the upright members 106, 108 continuously (see FIG. 4) or
discontinuously. Referring to FIGS. 1-4, the sleeves 118, 120 may
be snugly fit onto the upright members 106, 108. The sleeves 118,
120 may be closed at upper ends 118a, 120a and open at lower ends
118b, 120b. The sleeves 118, 120 may enclose or surround a majority
of the length of the upright members 106, 108 (see FIG. 4). The
sleeves 118, 120 may extend from the upper cross member 110 to the
lower cross member 112 and may be securely attached to the upright
members 106, 108 with the fasteners 116. As shown in FIGS. 6 and
11, a portion of the sleeves 118, 120 may be sandwiched between the
cross members 110, 112 and the upright members 106, 108 at the
intersection of the cross members 110, 112 and upright members 106,
108.
[0042] With reference to FIG. 4, various attachments (e.g., fabric
loops, common loops, three-bar sliders, and slider locks) may be
stitched or otherwise attached to the sleeves 118, 120 to provide
attachment points for accessories, suspension components, or both.
For example, the sleeves 118, 120 may provide attachment points for
a bag and a chair, both of which are described in more detail
below. Additionally, the torso pads 122, 124, the shoulder straps
126, 128, and the lumbar pad 129 may be attached to the sleeves
118, 120. By providing attachments on the sleeves 118, 120, the
cost and complexity of manufacturing the external frame 102 may be
reduced, since the attachments may be attached to the sleeves 118,
120 prior to fitting the sleeves 118, 120 onto the upright members
106, 108, and, after attachment of the sleeves to the upright
members, various accessories and suspension components may be
interchangeably attached to the sleeves 118, 120 via the attachment
points.
[0043] The sleeves 118, 120 may be constructed of various types of
material. In some implementations, the sleeves 118, 120 are
constructed of webbing. The webbing may be formed of nylon,
polypropylene, or other suitable materials. The webbing may be
formed as a flat strip or a tube. In implementations using flat
strip webbing, the webbing may be folded over onto itself and
opposing, longitudinally-extending edges of the strip may be
stitched together to form a shroud having an internal cavity with
cross-sectional dimensions sufficient to receive the upright
members 106, 108, and in some examples the sleeves 118, 120 have a
tight fit. The shroud may be closed at one end and open at the
other end, thus permitting the shroud to be snugly slid onto a
respective upright member 106, 108 until the upper end 106a, 108a
of the respective upright member 106, 108 abuts against the closed
end of the shroud. The attachment points of the suspension system
104 and accessories may be stitched into the seams of the
folded-over strip of webbing or attached to a face of the webbing
strips. In implementations using tube webbing, one end of the tube
webbing may be closed by stitching, for example, and then snugly
fit onto a respective upright member in the same manner described
above with respect to the folded-over strip of webbing. In the tube
webbing implementations, the attachment points of the suspension
system 104 and accessories may be attached, such as stitched, to
the outer surface of the tube webbing.
[0044] Referring to FIGS. 1-3, 8, 9, 12, and 15, the pair of torso
pads 122, 124 may be attached to the upright members 106, 108 of
the external frame 102. With reference to FIGS. 8 and 9, the torso
pads 122, 124 each may include a foam pad 132 positioned within a
housing 134. In some implementations, the foam pad is constructed
from polyethylene terephthalate (PET) closed-cell foam and is
0.75'' thick. The housing 134 may enclose the foam pad 132 and may
include two strips of material, an outer strip 136 and an inner
strip 138, attached to one another along opposing sides 132a, 132b
of the foam pad 132. The outer strip of material 136 may be
directed toward a wearer's back 114, while the inner strip of
material 138 may be directed toward the respective upright member
106, 108 (see FIG. 8). In some implementations, the outer strip of
material 136 is constructed of a moisture-control fabric, such as
the fabric marketed under the Dri-Lex.RTM. brand. In some
implementations, the inner strip of material is constructed of a
durable fabric material that is tear and abrasion resistant, such
as the fabric marketed under the Cordura.RTM. brand.
[0045] With continued reference to FIGS. 8 and 9, the housing 134
may be attached to a respective sleeve 118, 120 with one or more
strips of fabric material. In the depicted example, opposing side
edges 140a, 140b of a single strip of material 140 are attached to
the housing 134 at the junction of the outer and inner strips of
material 136, 138 along opposing sides 132a, 132b of the foam pad
132. An intermediate section 140c of the single strip of material
140 may be attached to a respective sleeve 118, 120 so as to
connect the housing 134 to the sleeve 118, 120 and thus to the
associated upright member 106, 108. The inner strip of material 138
of the housing 134 and the single strip of material 140 may be
joined together so as to define an open-ended, internal passage 142
peripherally-bounded by the strips 138, 140. In some
implementations, the single strip of material 140 is constructed of
a durable fabric material that is tear and abrasion resistant, such
as the fabric marketed under the Cordura.RTM. brand.
[0046] Referring to FIG. 9, the pair of torso pads 122, 124 may be
moveable relative to the pair upright members 106, 108 to provide a
customized, comfortable fit. As shown in FIG. 9, the free spans
144, 146 of the single strip of material 140 may permit the torso
pads 122, 124 to pivot and/or laterally translate relative to the
pair of upright members 106, 108, thereby allowing the torso pads
122, 124 to track the contour of a wearer's back 114 for increased
comfort. Additionally, the motion of the torso pads 122, 124
relative to the upright members 106, 108 may maintain the torso
pads 122, 124 in contact with the wearer's back 114 during relative
movement between the wearer and the external frame 102, thereby
providing flexibility to the backpack 100 and providing a more
comfortable fit relative to conventional external frame
backpacks.
[0047] The pair of shoulder straps 126, 128 may be attached to the
upright members of the external frame 102 and to the waist belt
130. Referring to FIGS. 1 and 12, one end 126a, 128a of the
shoulder straps 126, 128 may be attached to a lower portion of the
pair of sleeves 118, 120 and an opposing end 126b, 128b of the
shoulder straps 126, 128 may be attached to the waist belt 130.
From the ends 126a, 128a of the shoulder straps 126, 128 that are
attached to the sleeves 118, 120, the shoulder straps 126, 128 may
pass through the internal passage 142 defined between the torso
pads 122, 124 and the upright members 106, 108 and extend upwardly
along the upright members 106, 108 (see FIGS. 1 and 8). The
shoulder straps 126, 128 may be moveable, e.g., slideable, within
the internal passage 142 relative to the torso pads 122, 124 and
the upright members 106, 108. Padded sections 148, 150 of the
shoulder straps 126, 128 may define an apex of the shoulder straps
126, 128 and may extend forwardly and downwardly from the apex.
Adjustable, shoulder-pad lift straps 152, 154 may attach at upper
ends to the upper, closed end 118a, 120a of the sleeves 118, 120
and may attach at lower ends to the padded sections 148, 150 of the
shoulder straps 126, 128. The lift straps 152, 154 may lift the
padded sections 148, 150 of the shoulder straps 126, 128 off of the
top of a wearer's shoulder to prevent the weight of the backpack
100 and its supported load from pulling down on the top of the
wearer's shoulders, thereby transferring the load primarily to the
waist belt 130 through the external frame 102 and allowing the
shoulder straps 126, 128 to stabilize the load. The padded sections
148, 150 of the shoulder straps 126, 128 may be attached to one
another with a buckle 156 (see FIG. 1). From the padded sections
148, 150, the shoulder straps 126, 128 may extend downwardly and
attach at terminal ends 158, 160 to the waist belt 130 outwardly of
the lower ends 106b, 108b of the upright members 106, 108. These
lower extensions 158, 160 of the shoulder straps 126, 128 defined
between the padded sections 148, 150 and the waist belt 130 may be
adjustable in length to accommodate differently-sized wearers.
[0048] The waist belt 130 may extend transversely to, and may be
attached to, the upright members 106, 108 of the external frame
102. Referring to FIGS. 1, 3, 10-12, and 15, the waist belt 130 may
include an intermediate segment 162 and a pair of padded end
segments or wings 164 extending outwardly from the intermediate
segment 162. The intermediate segment 162 of the waist belt 130 may
include a pair of cups 166, 167 that define pockets 168 having open
upper ends and closed lower ends. The pockets 168 may snugly
receive lower ends 106b, 108b of the upright members 106, 108,
reducing or preventing lateral movement or slippage of the waist
belt 130 relative to the frame 102. The cups 166, 167 may be
constructed of a folded-over strip of material that is attached to
a rear surface of the intermediate segment 162 of the waist belt
130. The cup material may be formed of chlorosulfonated
polyethylene (CSPE) synthetic rubber (CSM), such as that marketed
under the Hypalon.RTM. brand, ballistic cloth, such as ballistic
nylon, or other types of durable materials. The padded wings 164
may be selectively positionable around a wearer's hip or pelvic
girdle, and ends of the padded wings 164 may be attached together
with a releaseable buckle 170 (see FIG. 1). The waist belt 130 may
be attached to the sleeves 118, 120 and the lumbar pad 129 with
adjustable straps.
[0049] The lumbar pad 129 may be attached to the lower cross member
112 and to the upright members 106, 108 of the external frame 102
with a fabric covering 172. Referring to FIGS. 10 and 11, the
fabric covering 172 may include a rear flap 174 that includes a
hemmed edge 175 that defines a passageway 176 that receives a
portion of the lower cross member 112 spanning between the upright
members 106, 108 to secure the lumbar pad 129 to the lower cross
member 112. From the lower cross member 112, the fabric covering
172 may extend downwardly along a rear side of the upright members
106, 108, may wrap around lower ends 106b, 108b of the upright
members 106, 108, may extend upwardly along a front side of the
upright members 106, 108, and may be adjustably attached to the
sleeves 118, 120 with hook and look fasteners 178 threaded through
a common loop 179, for example. The intermediate segment 162 of the
waist belt 130 may be sandwiched between the upright members 106,
108 and the fabric covering 172 of the lumbar pad 129, thereby
restraining vertical movement of the waist belt 130 relative to the
external frame 102 by forcing the cups 166, 167 upwardly into
engagement with the lower ends 106b, 108b of the upright members
106, 108.
[0050] One or more foam pads 180, 182 may be positioned along the
front side of the upright members 106, 108 and may be enclosed
within the fabric covering 172 of the lumbar pad 129. Referring to
FIGS. 10 and 11, the lumbar pad 129 may include two foam pads 180,
182 positioned one in front of the other within the fabric covering
172. A rearwardly-positioned foam pad 180 may be thinner than a
forwardly-positioned foam pad 182. In some implementations, the
rearwardly-positioned foam pad 180 may be 0.75'' thick, and the
forwardly-positioned foam pad 182 may be 1.5'' thick. The
rearwardly-positioned foam pad 180 may be constructed of a
different type of foam than the forwardly-positioned foam pad 182.
In some implementations, the rearwardly-positioned foam pad 180 may
be constructed of closed-cell foam, and the forwardly-positioned
foam pad 182 may be constructed of open-cell foam for
moisture-control purposes. For example, the open-cell foam may
absorb moisture, e.g., sweat, from the lumbar region of the wearer
during use. In some implementations, the rearwardly-positioned foam
pad 180 may be formed of polyethylene terephthalate (PET) and may
include a pressure-sensitive adhesive (PSA). In some
implementations, the forwardly-positioned foam pad 182 may be
formed of polyethersulfone (PES) with a UL temperature index.
[0051] Referring to FIGS. 1 and 15, the width of the lumbar pad 129
may be slightly larger than the separation distance between the
lower ends 106b, 108b of the upright members 106, 108. The width of
the lumbar pad 129 may provide a tighter wrap of the waist belt 130
around the wearer's hip girdle and waist, thereby providing a more
comfortable attachment with reduced slippage of the external frame
102 relative to wearer, especially under heavy loads. The lumbar
pad 129 also may be thicker than the padded end segments 164 of the
waist belt 130, thereby maintaining the external frame on the
wearer's waist for effective load transfer to the wearer's hips and
legs. The torso pads 122, 124 and the lumbar pad 129 may provide a
standoff between the external frame 102 and the wearer's back 114
to permit air flow between the frame 102 and the wearer's back 114
for cooling purposes. Further, the torso pads 122, 124 and the
lumbar pad 129 may prevent contact between the external frame 102
and the wearer's back 114 to provide a comfortable packing
experience.
[0052] The external frame 102 and suspension system 104 may provide
for quick attachment and detachment of various accessories, for
example, shelves or bags. Referring to FIG. 12, a chair or shelf
184 may be attached to the external frame 102 by attaching an inner
end 184a of the chair 184 to a pair of common loops 186 stitched to
the rear flap 174 of the lumbar pad 129. Support straps 188 may
extend from the outer end 184b of the chair 184 and may be attached
to the sleeves 118, 120 using triangular loops 190 stitched to the
sleeves 118, 120. With reference to FIGS. 13A and 13B, an example
of the connection of the inner end 184a of the chair 184 to the
rear flap 174 of the lumbar pad 129 is provided. A three-bar slider
192 may be attached to the chair 184 with a strip of webbing 194.
To attach the three-bar slider 192 to the common loop 186 (which is
attached to the rear flap 174 of the lumbar pad 129 with a fabric
loop 196), the three-bar slider 192 may be rotated ninety-degrees
relative to the common loop 186 such that the smaller dimension of
the three-bar slider 192 is aligned with the internal through-hole
of the common loop 186. Once aligned, the three-bar slider 192 may
be inserted through the through-hole of the common loop 186 and
rotated back to its nominal orientation to interlock the three-bar
slider 192 and the common loop 186, as shown in FIG. 13B. To detach
the three-bar slider 192 from the common loops 186, thereby
detaching the inner end 184a of the chair 184 from the lumbar pad
129, the above steps may be performed in reverse order.
[0053] Referring to FIG. 14, a bag 198 may be attached to the
external frame 102 by positioning a cradle 200 of the bag 198 over
the upper cross member 110, routing common loops 202, 204 attached
to the upper ends 118a, 120a of the sleeves 118, 120 through
openings 206 formed in the cradle 200 (a right-end portion of the
cradle is a mirror image of the depicted left-end portion of the
cradle and thus is not shown for clarity purposes), and extending
the lift straps 152, 154 exteriorly of the cradle 200. Once exposed
through the openings 206, the common loops 202, 204 may be attached
to corresponding connectors attached to the bag 198 to secure the
bag 198 to the external frame 102 (the corresponding bag connectors
are not shown). In some implementations, three-bar sliders (such as
that shown in FIGS. 13A and 13B) may be attached to the bag 198 and
may be interlocked with the common loops 202, 204 in the manner
described above. Although not shown, the bag 198 also may be
attached to lower portions of the external frame 102 via fabric
loops, common loops, three-bar sliders, ladder locks, or other
suitable connectors generally known in the art that may be attached
to the sleeves 118, 120 (see FIG. 4). The depicted bag 198 includes
a restrictable opening 208 (such as a drawstring opening), although
various types of bags may be attached to the external frame
102.
[0054] FIG. 15 is a rear elevation view of the backpack 100 of FIG.
1 situated on a wearer's back 114. With reference to FIG. 15, the
external frame 102 may be contained within the envelope of a
wearer's back 114. In other words, the upright members 106, 108
(hidden within the sleeves 118, 120) may be positioned closer to
one another than the width of the wearer's back, resulting in
weight savings and less bulk based in part on the reduced length of
the cross members 110, 112. The smaller size of the external frame
102 also reduces the likelihood of a wearer hitting their elbows
into the frame 102 and facilitates movement through tight places
when hiking through brush and trees, for example. The upright
members 106, 108 may extend above the upper cross member 110 to
facilitate attaching a bag to the external frame 102, and the
upright members may extend below the lower cross member 112 to
facilitate attaching the waist belt 130 to the external frame 102,
thereby stabilizing the backpack 100. The waist belt 130 may wrap
around the hip bones, pelvis structure, or both of the wearer to
facilitate load transfer from the external frame 102 to the hips
and legs of the wearer.
[0055] The foregoing discussion has been presented for purposes of
illustration and description and is not intended to limit the
disclosure to the form or forms disclosed herein. For example,
various features of the disclosure are grouped together in one or
more aspects, embodiments, or configurations for the purpose of
streamlining the disclosure. However, it should be understood that
various features of the certain aspects, embodiments, or
configurations of the disclosure may be combined in alternate
aspects, embodiments, or configurations. For instance, although the
sleeves are illustrated in association with the upright members,
the sleeves may be used in association with the upright members
and/or the cross members, which may be constructed of various
materials. Moreover, the following claims are hereby incorporated
into this Detailed Description by this reference, with each claim
standing on its own as a separate embodiment of the present
disclosure.
[0056] All directional references (e.g., proximal, distal, upper,
lower, upward, downward, left, right, lateral, longitudinal, front,
back, top, bottom, above, below, vertical, horizontal, radial,
axial, clockwise, and counterclockwise) are only used for
identification purposes to aid the reader's understanding of the
present disclosure, and do not create limitations, particularly as
to the position, orientation, or use of this disclosure. Connection
references (e.g., attached, coupled, connected, and joined) are to
be construed broadly and may include intermediate members between a
collection of elements and relative movement between elements
unless otherwise indicated. As such, connection references do not
necessarily infer that two elements are directly connected and in
fixed relation to each other.
* * * * *