Abstract: Implementations described and claimed herein provide systems and methods for load carriage using a load carriage apparatus. In one implementation, a frame top is disposed at a proximal end of a load carriage frame. The frame top includes a proximal bar and a distal bar each extending between a first side bar and a second side bar. A frame base is disposed at a distal end of the load carriage frame, and the frame base includes a rear portion connected to a first side portion and a second side portion. A spine connects a center portion of the proximal bar of the frame top to the rear portion of the frame base. A first tube extends from the first side bar to the frame base relative to the first side portion. A second tube extends from the second side bar to the frame base relative to the second side portion.

Abstract: Implementations described and claimed herein provide systems and methods for load carriage using a load carriage apparatus. In one implementation, a frame top is disposed at a proximal end of a load carriage frame. The frame top includes a proximal bar and a distal bar each extending between a first side bar and a second side bar. A frame base is disposed at a distal end of the load carriage frame, and the frame base includes a rear portion connected to a first side portion and a second side portion. A spine connects a center portion of the proximal bar of the frame top to the rear portion of the frame base. A first tube extends from the first side bar to the frame base relative to the first side portion. A second tube extends from the second side bar to the frame base relative to the second side portion.

Abstract: An SCBA backpack for air cylinders includes a chassis with a cradle receiving arrangement and a tank cradle for holding at least one air cylinder, wherein the tank cradle is removably secured to the chassis. Such an arrangement permits a variety of different tank cradles that may secure one or more cylinders but that are still compatible with a common backpack chassis.

Abstract: A load bearing vest comprising a yoke, a core for carrying armor attached to the yoke, and a waist belt assembly for distributing weight to the waist or hips of a user attached to the yoke.

Abstract: A backpack includes a stabilizing and ventilating side bolsters coupled to a frame. The side bolsters are secured to the frame by being received in sleeves or by straps having clips disposed through slots in the side bolsters. A particular side bolster includes at least one channel to allow air flow away from the back side of the wearer. The side bolster is comprised of high-density foam to stabilize the backpack under load while providing improved ventilation. The side bolsters have a center axis that is spatially separated in a forward direction from a surface of the frame to allow the side bolsters to contour around the back side of the wearer. The side bolsters may be formed for a particular environment, body type, or loads to be carried in the backpack by changing the stiffness, density, material, dimensions or other aspects of the side bolsters.

Abstract: Carrier system for a backpack energy source, energy source and backpack energy source assembly The invention in particular is directed to a carrier system for a backpack energy source (2). The carrier system comprises a carrier plate (4) with a coupling interface (25) implemented to be exchangeably coupled to a counter coupling interface (31) of an energy source (2).

Abstract: A backpack and frame are disclosed. The backpack frame is designed to be at least partially internal and is of unitary construction, most advantageously of a resin-impregnated material, such as resin-impregnated carbon fiber sheets with selective reinforcement by interstitial layers. The frame has a mid-back portion that includes openings for independently positionable shoulder straps and a lower back portion that provides for a rotatable connection to a belt assembly. A pair of curved stay portions is contiguous with the mid-back portion of the frame and curves outwardly as the stay portions extend downwardly. The frame is preferably curved to match the curvature of the human back. The backpack frame is lightweight and by use of composite materials can provide strength as well as selective flexibility to suspend the load of the backpack and decouple it from the movements of the wearer.

Abstract: An adjustable positioning mechanism, such as for positioning ends of straps or handles of bag or packs, such as for backpacks, but also, more generally, for removably connecting an item to an article to be carried to provide a range of attachment locations for the item relative to the article, to achieve an optimum ergonomic position of the item at one of the attachment locations. One element of the adjustment mechanism can be either adhesively bonded to the article or made in one piece with a frame of the article, the item to be attached bearing a second element of the mechanism.

Abstract: A backpack frame system having a slotted frame configured to be detachably and interchangeably connected with a backpack is provided. The frame can include a plurality of generally uniformly spaced-apart slats extending between at least two upright members or cross members. Slots are defined between the slats, which are adapted for connection with an attachment system such that one or more objects or cargo may be hung from or otherwise secured to the frame. A looping system is provided for connecting the frame to the backpack. The backpack may be provided with a looping system comprising first and second sets of loops that can be interconnected by a connector and encircle a portion of the frame, such as an upright member, thereby connecting the frame to the backpack.

Abstract: An apparatus for supporting a back pack from a user comprises a substantially u-shaped harness, the harness having a rear neck portion and a pair of front portions extending therefrom. The apparatus further comprises at least one top harness connector suspended substantially downwardly from the rear neck portion, the at least one top harness connector being selectably attachable to the top of a backpack and a bottom harness connector extending from each front portions, each of the bottom harness connectors being selectably attachable to a bottom of a backpack. A system for supporting a load from a user comprises a harness and a first pack having at least one pack top connector and at least two bottom pack connectors. The harness may be located within an article of clothing.

Abstract: The present disclosure provides a lightweight, ergonomically improved backpack system comprising a storage section, an upper harness, a lower harness and an ergonomic backpack frame, that may be configured to facilitate the carrying of loads that may substantially exceed the weight of the ergonomic backpack frame. The ergonomic backpack frame may include a flex portion that includes at least one flex region. The flex portion of the ergonomic backpack frame may allow the backpack frame to substantially conform to a user's back while walking during utilization of the backpack system.

Abstract: An embodiment of the present invention provides a backpack for wearing on a back of a user. The backpack includes at least one cargo compartment, two straps, and a frame. The cargo compartment is wider at a top end of the cargo compartment than at the bottom end. The frame has a first portion located adjacent to one side of the user's spine and a second portion located adjacent to the other side of the user's spine. The first and second portions are shaped to be complementary to the user's spine. Also, massaging beads are located in the frame and massage muscles on each side of the user's spine.

Abstract: One embodiment of a backpack frame extender for augmenting the length of an external backpack frame to provide longitudinally elevated connection fittings for a backpack frame load lifter straps. The backpack frame extender includes a plurality of stays and straps for attachment to a backpack frame, with a means for releasably connecting the backpack frame load lifter straps to the backpack frame extender. The attachment straps allow the backpack frame extender to be releasably attached to the backpack frame and positioned at various heights as determined by a user's torso length and personal preference. Other embodiments are described and shown.

Abstract: A backpack and frame are disclosed. The backpack frame is designed to be at least partially internal and is of unitary construction, most advantageously of a resin-impregnated material, such as resin-impregnated carbon fiber sheets with selective reinforcement by interstitial layers. The frame has a mid-back portion that includes openings for independently positionable shoulder straps and a lower back portion that provides for a rotatable connection to a belt assembly. A pair of curved stay portions is contiguous with the mid-back portion of the frame and curves outwardly as the stay portions extend downwardly. The frame is preferably curved to match the curvature of the human back. The backpack frame is lightweight and by use of composite materials can provide strength as well as selective flexibility to suspend the load of the backpack and decouple it from the movements of the wearer.

Abstract: The invention relates to a rucksack (1) with a horizontally and vertically rear-ventilated air conditioning zone (6). It is composed of a shoulder strap carrying system (2), a rear wall (3) with a stiffening frame (4), and a mesh (5) stretched across the rear wall and/or across the stiffening frame for creating the rear-ventilated air conditioning zone (6) between the rear wall (3) and the back of a rucksack wearer. By virtue of the stretched mesh (5), the rear wall (3) is kept away from the back of the wearer both in the hip region and in the shoulder region and allows both a horizontal and a vertical exchange of air. In a variable embodiment of the rucksack (1), the rucksack (1) can optionally be adapted to the body of the wearer by attaching the shoulder straps (2) in the shoulder-side region in a horizontally and vertically adjustable manner to a baseplate (15) attached to the mesh (5).

Abstract: A structural support member 10 for a harness 100 for breathing apparatus, the structural support member being generally elongate and arranged in use to support a cylinder of breathable gas, the structural support member comprising: a frame having; a lower portion 11 arranged in use to support a first end of a cylinder; an upper portion arranged in use to support a second opposed end of the cylinder; and first and second side limbs 26, 36 coupling the upper and lower portions and defining a void 14 therebetween, in a substantially central region of the frame.

Abstract: A harness for breathing apparatus, comprising a structural support member 10 having a front for accommodating a gas cylinder and a rear for facing the back of a wearer, and left and right sides. Left and right shoulder straps 110, 120 are disposed towards the left and right sides of the structural support member respectively, and each shoulder strap has a first end attached to an upper portion of the structural support member and a second end attached to a lower portion of the structural support member. A plurality of flexible conduits 140, 150 extend from a lower portion of the structural support member along the structural support member, each to a position on either the left or right shoulder strap. Left and right guide channels 30, 32 extend longitudinally along the structural support member along left and right sides respectively, for accommodating the flexible conduits.

Abstract: A backpack system is provided including an external frame, a pack bag and a sling configured for extending between the frame and pack bag providing a space between the frame and pack bag for accommodating heavy or bulky cargo therebetween. The sling can be extended or retracted in order to selectively adjust the distance between the pack bag and frame. The backpack system may also include a pouch for supporting a lower end of relatively long object therein, which may be carried in the space between the pack bag and frame. In one embodiment, the pack bag is equipped with stiffening members for supporting the pack bag when not mounted directly to the frame.

Abstract: An air breathing battery apparatus is connected to the hollow tubing of a backpack frame to provide an uninterrupted, water-resistant, light-weight power supply during extended remote operations in the field. Air breathing power sources are connected to the hollow tubes of the backpack assembly to provide a constant uninterrupted air supply in a relatively small package that fits easily into the backpack frame with only negligible added weight. The positioning of the air breathing power source in a backpack composed of hollow tubing also protects the battery from inclement weather or when the user is in water, for example, while fording a river or stream, to permit the uninterrupted use of the electronics powered by the battery.

Abstract: A backpack from has a forwardly facing side and a back side. The frame comprises a base having a generally flat midsection with forwardly curved end sections. A pair of mutually spaced arms project from the end sections of the base. The arms have a degree of twist that gradually diminishes from the end sections of the base to the upper distal ends of the arms.

Abstract: Disclosed is a backpack with a shoulder strap height adjustment unit, in which a rail frame is installed on a back surface of the backpack and shoulder straps are vertically guided by the rail frame, thereby allowing the height of the shoulder straps to be adjusted according to the physical characteristics of a user.

Abstract: A backpack of very simple construction is disclosed, which uses modern materials and elements to achieve great comfort and extreme light weight. A sheath is made of light, strong cloth or other pliable material, constructed so as to contain a folded backpacker's sleeping pad or other suitable removable pad, and hold it against the bearer's back. To said sheath are attached a plurality of spaced-apart vertical support members made of a light, rigid but flexible material, for attachment and support of the load. A pair of shoulder straps and a hip belt are attached for securing the backpack to the bearer's back.

Abstract: Resin-impregnated sandwich composite backpack frames are disclosed. The frames may, for example, be made of a carbon fiber twill with a foam core. The frames have an upper portion that includes upwardly-extending, elongate stays to support a backpack and mechanically decouple its load from the wearer. Open, generally vertically extending tracks in the upper portion provide points of attachment for shoulder strap assemblies. The lower portion is contoured to follow the typical lumbar-sacral curvature of the human back and terminates in a generally U-shaped tongue. Openings and unreinforced areas in the frame are provided to reduce weight and increase flexibility.

Abstract: A hunting blind assembly having a frame adapted for shoulder supported carriage; a collapsible hunting blind; a durable flexible sheet fitted for, upon movement of the hunting blind to its collapsed configuration and upon placement of the hunting blind in contact with the frame's back side, and between the frame's left and right ends, arcuately covering the hunting blind; and left and right pluralities of ties interconnecting the frame with the durable flexible sheet, the left and right pluralities of ties, in combination with the frame and the durable flexible sheet, encapsulating the hunting blind.

Abstract: A pack with an integrated seat, including a base member comprising oppositely disposed first and second edges, a fixed leg member connected to the first edge, a hinged leg member pivotally connected to the second edge, a rigid seat member pivotally connected to the fixed leg member and arranged to be supported by the fixed leg member and the hinged leg member when the pack is arranged in a seating position, a shell arranged to at least partially enclose a volume defined by the fixed leg member, the hinged leg member, and the base member.

Abstract: The present invention involves the provision of a backpack frame assembly and associated load carrying devices. The backpack frame includes a plurality of stays having flexible joints therebetween. A membrane is secured to certain of the stays and helps resist flexing of joints between adjacent stay end portions. Load carrying devices may be provided and are releasably mounted to the frame assembly. The distance between the assembly's shoulder straps and hip belt can be adjusted to accommodate user's having different torso lengths by using an adjuster sheet to separate hook and look members attaching a shoulder strap assembly to a frame assembly. The adjuster sheet can operate as a support element when not operating as an adjuster. The adjuster sheet can be constructed of a laminated composite material and include reinforcing ribs formed therein.

Abstract: A structural support member 10 for a harness 100 for breathing apparatus, the structural support member being generally elongate and arranged in use to support a cylinder of breathable gas and one or more components operatively associated with the breathing apparatus, wherein the structural support member comprises first and second parts 20, 30 defining therebetween a housing for retaining one or more of the components.

Abstract: A backpack system is provided including an external frame, a pack bag and a sling configured for extending between the frame and pack bag providing a space between the frame and pack bag for accommodating heavy or bulky cargo therebetween. The sling can be extended or retracted in order to selectively adjust the distance between the pack bag and frame. The backpack system may also include a pouch for supporting a lower end of relatively long object therein, which may be carried in the space between the pack bag and frame. In one embodiment, the pack bag is equipped with stiffening members for supporting the pack bag when not mounted directly to the frame.

Abstract: Dual-strap carrying assemblies and devices including such assemblies are provided herein. The carrying devices may be embodied in dual carrying strap golf bags that allow the bearer to more easily don and remove the bag. The secondary strap of the dual strap assembly is connected to the primary strap by a movable engagement assembly, such as an assembly that rotates to allow the secondary strap to more easily become within the reach of the bearer of the bag. In some embodiments, the movable engagement assembly may include a movement limiting device that prevents the secondary strap from moving too far out of the bearer's reach. The strap assemblies may be used in combination with a flexible base stand to make a self-standing carrying device that is easy to don and doff.

Abstract: A backpack from has a forwardly facing side and a back side. The frame comprises a base having a generally flat midsection with forwardly curved end sections. A pair of mutually spaced arms project from the end sections of the base. The arms have a degree of twist that gradually diminishes from the end sections of the base to the upper distal ends of the arms.

Abstract: An adjustable harness 10 for a self contained breathing apparatus, a back plate 12, a sliding plate 16, a pair of shoulder straps 20, 22 and a belt 18. The sliding plate 16 can move longitudinally with respect to the back plate between the extended position and the un-extended position. Shoulder straps 20, 22 are fixed to an upper portion of the sliding plate and a belt 18 is fixed to a lower portion of the back plate. A valve 28 is provided at the bottom of the back plate 12 so that a cylinder of breathable gas connected to the valve may be retained by a retaining strap 13. Hoses 24, 26 are attached to the sliding plate 16, cross over in the region of the opening 14 and as such the side of the sliding plate 16 to which they are attached is different to the side of the valve 28 from which they leave. Guide channels 34 are shaped to retain the hoses 24, 26. The hoses 24, 26 fold and unfold within the confines of the plates 12, 16 to prevent snagging.

Abstract: A cylinder back plate includes a frame member 11 and a cylinder clamp 12 connected to the frame member 11 by means of a pivot 13. The cylinder clamp 12 comprises a band of rigid or semi-rigid material. The cylinder clamp 12 has a retaining position with respect to the frame member 11, wherein the cylinder clamp extends substantially perpendicularly to the plane of the frame member. The frame member 11 lies parallel to a back plate of the harness or is constituted by the back plate of the harness. Thus, when the cylinder clamp 12 is in the retaining position a cylinder can be retained securely to the frame member and sliding of the cylinder relative to the frame member or back plate can be prevented. When it is desired to attach a new cylinder to the harness, the cylinder clamp 12 can be pivoted into a loading position.

Abstract: A backpack comprises a load carrying section with a forwardly facing front panel. A pair of mutually spaced sleeves are joined to and border the sides of the front panel. An injection molded generally U-shaped partial perimeter frame has a base bordering a bottom of the front panel, with arms projecting from the base and into the sleeves on the sides of the panel. The load carrying section of the backpack is comprised principally of fabric. The front panel is flexible and has a stiffness greater than the stiffness of the fabric forming other portions of the backpack. In one embodiment, the front panel is integrally stiffened. In another embodiment, the front panel forms a pocket configured and dimensioned to accept a flexible stiffening plate.

Abstract: A backpack includes a stabilizing and ventilating side bolster assembly coupled to a frame. The side bolster assembly includes breathable side bolsters received in breathable sleeves that cooperate with the frame to stabilize the backpack under load while providing improved ventilation between the backpack and a back side of a wearer of the backpack. The side bolsters may be customized for a particular environment, for a particular body type, or for particular loads to be carried in the backpack by changing the stiffness, density, material, dimensions or other aspects of the side bolsters.

Abstract: An air breathing battery apparatus is connected to the hollow tubing of a backpack frame to provide an uninterrupted, water-resistant, light-weight power supply during extended remote operations in the field. Air breathing power sources are connected to the hollow tubes of the backpack assembly to provide a constant uninterrupted air supply in a relatively small package that fits easily into the backpack frame with only negligible added weight. The positioning of the air breathing power source in a backpack composed of hollow tubing also protects the battery from inclement weather or when the user is in water, for example, while fording a river or stream, to permit the uninterrupted use of the electronics powered by the battery.

Abstract: A backpack includes a bag having an interior packing space and a back wall that has a top and a bottom. The back wall includes an opening proximate the top of the back wall. A back contacting surface is attached to the top of the back wall and the bottom of the back wall. A frame is removably mounted to the back wall between the back wall and the back contacting surface. The frame includes a bend configured to space the back wall from the back contacting surface. The frame is insertable and removable to and from the back wall through the opening.

Abstract: The invention relates to a rucksack (1) with a horizontally and vertically rear-ventilated air conditioning zone (6). It is composed of a shoulder strap carrying system (2), a rear wall (3) with a stiffening frame (4), and a mesh (5) stretched across the rear wall and/or across the stiffening frame for creating the rear-ventilated air conditioning zone (6) between the rear wall (3) and the back of a rucksack wearer. By virtue of the stretched mesh (5), the rear wall (3) is kept away from the back of the wearer both in the hip region and in the shoulder region and allows both a horizontal and a vertical exchange of air. In a variable embodiment of the rucksack (1), the rucksack (1) can optionally be adapted to the body of the wearer by attaching the shoulder straps (2) in the shoulder-side region in a horizontally and vertically adjustable manner to a baseplate (15) attached to the mesh (5).

Abstract: The present invention provides a rucksack comprising an enclosure for containing a load to be carried. A frame is attached to a back wall of the enclosure and shaped to hold the back wall of the enclosure away from the user's back to create an air gap. One or more web elements extend from a top portion of the frame to a bottom portion of the frame across the air gap. The rucksack also has a pair of shoulder straps with their top ends adjustably mounted on the web element(s) to be adjustable along the web element(s) between a first position nearer the top of the frame and a second position nearer the bottom of the frame.

Abstract: A backpack which includes a frame and a cover. The frame has a first frame element which is connected with a first portion of the cover and a second frame element which is connected to a second portion of the cover. The second frame element is pivotably arranged on the first frame element at a region lying between an upper region and a lower region of the first frame element.

Abstract: A backpack assembly for a self contained breathing apparatus comprises a plurality of components positioned in housings that define a body for the backpack assembly. The body is assembled to a back frame. A pivoting and swiveling hip plate is connected to the back frame in multiple distinct positions to provide a customizable and comfortable fit for the wearer.

Abstract: The invention relates to a backpack (1) comprising a bag (2), a frame (3a, 3b, 5) secured to the rear face (7) of the bag so as to form a dorsal plane (9) having a pair of straps (11a, 11b) slidably mounted thereon, and a belt assembly (13) having a bottom portion (15) arranged to be held around the waist. Link means (17, 19) are arranged between the belt assembly (13) and the pair of straps (11a, 11b), together forming a dorsal holder element (21) arranged to enable the belt assembly to be slidably mounted relative to the dorsal plane. Suspension support means (23) are arranged between the bottom portion (15) of the belt assembly and the bottom portion (25) of the dorsal plane in order to retain the bag by keeping the dorsal plane pressed against the back and by damping movements of the bag relative to the dorsal holder element.

Abstract: An exoskeletal backpack system includes a pelvic superstructure, a trunk superstructure, and an articulating connector. The pelvic superstructure is configured to be carried by a user, such as, for example, a person. The trunk superstructure also includes a user engagement element that is configured as a pair of flexible composite shoulder extensions.

Abstract: A suspended-load backpack designed to permit the load to move relative to the wearer during walking and running so that the large movements between the load and the wearer of the backpack reduce the fluctuations of vertical motion of the load with respect to ground. Because the hip (and thus the pack body) goes up a down a good deal during walking, a large relative movement between the wearer and the load reduces the absolute excursion of the load. This movement may be, in turn, transferred to a motor through, for example, a rack and pinion gear, to convert the mechanical movement to electrical or mechanical energy. Such movement of the suspended-load relative to the wearer also reduces the forces on the wearer's body while walking or running, thus reducing the likelihood of orthopedic injury.

Abstract: A carrying system is provided for use with breathing apparatus. The carrying system includes a backplate and a plurality of straps adapted to hold the backplate on the back of a user when the carrying system is worn. The backplate includes at least one plate of a plastics material. The at least one plate having a predetermined shape and the at least one plate being adapted to provide impact protection to a user during use by at least partially absorbing and/or dispersing impact forces, and to deform resiliency in response to external forces imposed by bending and/or twisting of a user during use and return substantially to its predetermined shape when not subjected to an external force.

Abstract: One embodiment of the present invention relates to a carrying system with an enclosure member and a shoulder attachment system. The shoulder attachment system includes a first and second shoulder strap individually coupled to the external surface of the enclosure member. The bottom ends of the first and second shoulder straps are intercoupled via a coupling member. The coupling member is slidably routed through a sleeve member within the internal region of the enclosure member. The sleeve member includes an internal channel having a cross-sectional shape that substantially matches the cross-sectional shape of the coupling member, thereby minimizing frictional resistance as the coupling member is translated through the sleeve member. The slidable intercoupling between the bottom ends of the first and second shoulder straps with respect to the enclosure member enables articulation of one shoulder strap to be balanced by corresponding articulation of the opposite shoulder strap.

Abstract: One embodiment of the present invention relates to a user based carrying system capable of independent transportation of a load including a hip-based user attachment system. The carrying system includes an enclosure member having an internal region encased by an internal surface. A user attachment system releasably secures the carrying system to the user for independent transportation without requiring muscular engagement. The user attachment system includes a hip attachment system with a dorsal articulation member and a strap member. The dorsal articulation member includes a front and rear member three-dimensionally moveably coupled to one another. The rear member is coupled to the enclosure member and the front member is coupled to the strap member. The three-dimensional moveable coupling between the front and rear members includes three restricted degrees of freedom configured to efficiently absorb corresponding user hip movements and directly support other user hip movements.

Abstract: A backpack frame has a front side and a back side and comprises generally parallel base and top sections that extend transversely across and are spaces one from the other along a center line of the frame. Side rails connect the base section to the top section. The side rails are arranged on opposite sides of the frame center line, and a stabilizing rib interconnects the side rails and extends transversely across the center line at an intermediate location between the base and top sections. The side rails converge inwardly from the base section towards the frame center line to the stabilizing rib, and diverge outwardly from the stabilizing rib and away from the center line to the top section.

Abstract: A rucksack comprising a bag having a back panel and, among other things, a belt assembly and a rigid frame secured to the back panel and the belt assembly. According to the invention, the bottom portion of the rigid frame has a V-shaped configuration with an angle ? at the apex, and in its middle and rear portion, the belt assembly includes an upwardly open pocket having a V-shaped configuration with an angle ? at the apex, where ? is greater than ?, such that said pocket is suitable for serving as a housing for receiving the V-shaped bottom portion of the frame while allowing the belt assembly to pivot angularly to some extent relative to the remainder of the rucksack.

Abstract: A backpack ventilator is described. An embodiment of the present invention includes a portion of mesh fabric that is attached to a conventional fabric and a spring wire perimeter frame is inserted between them. Stretched between various points on the frame is a plurality of springs. The resulting backpack ventilator is secured between a backpack and the wearer. The springs distribute the pressure from the backpack across a wide contact area to increase comfort for the wearer. The backpack ventilator significantly increases airflow ventilation between the wearer and the backpack. As the wearer moves, the frame and springs absorb some of the impact forces that would otherwise be directed towards the wearer. Furthermore, the movement also causes the ventilator to draw air in and out of the mesh fabric thereby reducing heat and sweat buildup.

Abstract: The present invention involves the provision of a backpack frame assembly and associated load carrying devices. The backpack frame includes a plurality of stays having flexible joints therebetween. A membrane is secured to certain of the stays and helps resist flexing of joints between adjacent stay end portions. Load carrying devices may be provided and are releasably mounted to the frame assembly. The distance between the assembly's shoulder straps and hip belt can be adjusted to accommodate user's having different torso lengths by using an adjuster sheet to separate hook and look members attaching a shoulder strap assembly to a frame assembly. The adjuster sheet can operate as a support element when not operating as an adjuster. The adjuster sheet can be constructed of a laminated composite material and include reinforcing ribs formed therein.