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US3923216A - Backpacker{3 s device - Google Patents

Backpacker{3 s device Download PDF

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Publication number
US3923216A
US3923216A US526544A US52654474A US3923216A US 3923216 A US3923216 A US 3923216A US 526544 A US526544 A US 526544A US 52654474 A US52654474 A US 52654474A US 3923216 A US3923216 A US 3923216A
Authority
US
United States
Prior art keywords
shoulder
frame structure
frame
straps
lower ends
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US526544A
Other languages
English (en)
Inventor
Fred A Farnbach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JOHNSON CAMPING Inc A CORP OF DE
JOHNSON CAMPING Inc A CORP OF DELAWARE
Johnson Diversified Inc
Original Assignee
Johnson Diversified Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Johnson Diversified Inc filed Critical Johnson Diversified Inc
Priority to US526544A priority Critical patent/US3923216A/en
Priority to GB48224/75A priority patent/GB1526098A/en
Priority to CA240,248A priority patent/CA1077899A/en
Priority to SE7513260A priority patent/SE405198B/xx
Priority to ZA757403A priority patent/ZA757403B/xx
Priority to DE19752553729 priority patent/DE2553729A1/de
Application granted granted Critical
Publication of US3923216A publication Critical patent/US3923216A/en
Priority claimed from FR7536847A external-priority patent/FR2333464A1/fr
Assigned to JOHNSON CAMPING, INC., A CORP OF DELAWARE reassignment JOHNSON CAMPING, INC., A CORP OF DELAWARE MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE: 06/16/80 STATE OF INCORP. DELAWARE Assignors: CAMP TRAILS COMPANY, A CORP OF DE.
Assigned to JOHNSON CAMPING, INC., A CORP. OF DE. reassignment JOHNSON CAMPING, INC., A CORP. OF DE. MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE JUNE 17, 1980. Assignors: CAMP TRAILS COMPANY
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45F—TRAVELLING OR CAMP EQUIPMENT: SACKS OR PACKS CARRIED ON THE BODY
    • A45F3/00—Travelling or camp articles; Sacks or packs carried on the body
    • A45F3/04—Sacks or packs carried on the body by means of two straps passing over the two shoulders
    • A45F3/08—Carrying-frames; Frames combined with sacks
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45F—TRAVELLING OR CAMP EQUIPMENT: SACKS OR PACKS CARRIED ON THE BODY
    • A45F3/00—Travelling or camp articles; Sacks or packs carried on the body
    • A45F3/12—Shoulder-pads
    • A45F2003/122—Back cushioning parts or details of backpacks, e.g. with ventilation
    • A45F2003/125—Back cushioning parts or details of backpacks, e.g. with ventilation with ventilation

Definitions

  • ABSTRACT A backpackers device characterized by a frame structure having a central weight-bearing leg which terminates in a lower foot, and two lateral weight-bearing legs, one on either side of the central leg, each terminating in lower ends and connected to the central leg remote from the lower foot and lower ends.
  • the frame structure is formed of a single bar in a generally M-shaped configuration.
  • the lateral legs of the frame are preferably flexible.
  • Other preferred embodiments include a contoured profile in the frame, a hip belt to which the weight-bearing legs of the frame are attached in a particular relationship, a rigid belt-reinforcing strap to prevent excessive lateral movement of the frame lower ends, and a packbag secured on the frame in a particular relationship.
  • BACKPACKERS DEVICE BACKGROUND OF INVENTION This invention relates to the field of backpacking equipment and in particular to devices by which backpackers can carry loads.
  • the ladder or H type frame was developed years before the development of the sophisticated packbags now popularly used in conjunction with such frames.
  • the ladder frame was developed at a time when it was necessary for a packer to lash articles to his pack frame.
  • the articles he wanted to carry were collected and wrapped in a poncho, ground sheet or shelter sheet to form one or more bundles which were then lashed with cord to the frame for transporting. Since it was of primary importance that none of the packed articles become dislodged or lost along the trail, the packer put much emphasis on tying the lashing securely.
  • the frames therefore, had to withstand forces of considerable magnitude generated by lateral, vertical and/or diagonal lashings. To withstand this, the pack frame had to have substantial rigidity and be strong enough to withstand lashing stresses.
  • the ladder or H type pack frame configiration provided the necessary rigidity and strength for this purpose.
  • a further significant disadvantage referred to above is the loss of energy sustained by a backpacker by virtue of the repetitive generation of force which is resisted by the rigid ladder frame. Such energy would preferably be conserved for use in more pleasurable pursuits. Further, in many cases pressures are concentrated on certain areas of the packers body causing pain or discomfort. Also, the cross pieces used in many ladder frames are in position to bear on the packers back or spine or shoulders in a way causing discomfort.
  • the backpackers device of this invention overcomes the aforementioned problems.
  • the invention is characterized by a unique frame structure having a central weight-bearing leg which terminates in a lower foot, and two lateral weight-bearing legs, one on either side of the central leg, each terminating in lower ends and connected to the central leg remote from the lower foot and lower ends.
  • the frame structure is formed of a single bar in a generally M- shaped configuration.
  • the lateral legs of the frame are preferably flexible.
  • Other preferred embodiments include a contoured lateral profile in the frame, a hip belt to which the weight-bearing legs of the frame are attached in a particular relationship, a rigid belt-reinforcing strap to prevent excessive lateral movement of the frame lower ends and to help distribute the load around the back of the packers hips, and a packbag secured on the frame in a particular relationship.
  • This invention is'based in part on the discovery or recognition that significant rigidity in a frame structure is no longer necessary, and indeed, that such excessive rigidity is undesirable.
  • flexing or bending can be accepted by the weight-bearing legs without substantial resistance, because of the configuration of the frame. Dynamic forces will be distributed over the frame structure, being dispersed so as not to cause fatique or failure.
  • the frame can be allowed to bend to accommodate body movement.
  • the three support points provided by the lower ends of the lateral legs and the lower foot of the central leg are not rigidly connected generally in the upper portion of the frame. At their lower extremities they are free to undergo a degree of relative lateral movement one with respect to the others and may therefore move as needed to accommodate body movement.
  • the center lift point, or lower foot as it is often referred to herein, may be attached to a padded section of a hip belt in an area to be near, preferably just below, the point where the spine is joined to the pelvis. At this point the lower foot transmits a substantial amount of weight to the pelvis, preferably transferring the weight of the packed load around the back of the pelvic shelf. Such transfer may be facilitated by use of a rigid beltreinforcing strap which extends across the back of the packers hips.
  • the center lift point is very favorably located with relation to the center of gravity of the packed load, particularly in embodiments of this invention in which the upper portions of the aforementioned two support columns are contoured forward toward the packers shoulders. Since the lower foot lifts from a point nearly directly beneath the center of gravity of the load, the backward pulling of the top portion of the loaded frame is minimized, thereby minimizing the forward thrust of the bottom portion of the frame. Further, since the packed load may be centered almost directly over the central lower foot lift point, the load can nearly be in balance over this point, thereby requiring a minimum of forward pulling by the packer through shoulder straps attached to the upper portion of the frame structure. This, of course, provides more comfort to the packer.
  • the lower foot In addition to the load-bearing function of the centrally located lift point, the lower foot there of functions, to hold the lower part of the frame rearward, countering the forward thrust which occurs as the packed load tends to rotate about the central point of lift.
  • the two lateral legs on either side of the central leg, also have a load-bearing function.
  • These lateral legs have lower ends which are attached by a flexible connection to a hip belt. Flexibility in the lateral legs provides improved freedom of body movement for the packer and its obvious benefits in a wide variety of activities.
  • the lower ends of the lateral legs are normally flexibly attached to the belt at points forward of the centrally located lower foot. The three lift points, therefore, may be located across and around the back of the pelvis, and provide a superior load-bearing arrangement.
  • Certain embodiments of the frame of this invention are designed in such a way that two interconnected support columns, which form, for example, the two halves of an M-shaped frame structure, support the pack load well up along the packers back and over the shoulder area. This not only allows good distribution and equalization of pressure on the packers body, but provides a convenient attachment point, at the tops of the support columns, for rigid shoulder braces. Such braces provide improved load stability and spacing between frame and back which is advantageous from the standpoint of comfort.
  • the shoulder braces used in preferred embodiment of this invention are the subject of a commonly owned copending patent application of Jerry D. Robertson, Ser. No. 251,054, filed May 8, 1972.
  • Another object of this invention is to provide a pack frame having only the necessary rigidity and having an improved weight-bearing configuration.
  • Another object of this invention is to provide a backpackers device having improved comfort in a wide variety of backpackers activities.
  • Another object of this invention is to provide a pack frame allowing improved freedom of movement. and reducing or eliminating loss of energy caused by work wasted in flexing a rigid frame.
  • Yet another object of this invention is to provide a pack frame of unique and simple construction, having no welds or other juncture points.
  • Still another object of this invention is to provide backpackers equipment including a frame having a primary support point located closely in line with the center gravity of the packers load.
  • Another object of this invention is to provide backpackers equipment including a frame which is designed to transfer weight to the packers body near the juncture of his spine and pelvis.
  • Another object of this invention is to provide a pack frame which is much less susceptible to structural failure than the well known ladder type frame.
  • Another object of this invention is to provide backpackers equipment overcoming the aforementioned problems which provides a high degree of comfort to the packer.
  • FIG. 1 is a perspective view of a preferred frame structure of this invention.
  • FIG. 2 is a side elevation of the structure of FIG. 1, showing its intended position with respect to a packers back.
  • FIG. 3 is a back elevation of the device in FIG. 2.
  • FIG. 4 is a perspective view of a backpackers device according to this invention.
  • FIG. 5 is a side elevation showing the device of FIG. 4 in position on a backpacker.
  • FIG. 6 is a view of section 6-6 as indicated in FIG. 3, including, however, only the frame, to illustrate the bearing locations of the three legs.
  • FIG. 1 is a perspective view of a frame structure 10 which is formed of a single bar which has an M shaped configuration.
  • Bar 12 may be-made of a variety of materials. Preferred materials are hollow aluminum stock or hollow magnesium aluminum alloys. Numerous light weight metals are also preferred materials for use in bar 12. In addition to metals, other sufficientlyrigid materials would be entirely acceptable. Bar 12 need not be hollow, but may be a solid rod. Bar 12 has a round cross section; however, other cross-sectional shapes are quite acceptable. In determining materials for use in bar 12, consideration may be given to weight, strength and flexibility.
  • Single bar 12 may be formed into the M shaped configuration shown by any of a number of methods, including bending, casting and the like. Bar 12 has no welds or other connections, since it is made from one piece.
  • Frame structure 10 includes central leg 14 which is formed of a central portion of bar 12 doubled over.
  • Central leg .14 terminates in a centrally located lower foot 16, which provides the primary lift point of frame structure 10.
  • At its upper end lower foot 16 is connected to two lateral weight-bearing legs 18, one on either side of central leg 14.
  • lateral legs 18 and the upper protions of central leg 14 are intergral.
  • Lateral legs 18 terminate in lower ends 20, which are generally adjacent to lower foot I6 such that both lower ends 20 and lower foot 16 may be connected to a hip belt as will be explained further herein.
  • Frame structure has a certain rigidity by virtue of the rigidity of single bar '12, however, because of the free-end construction,-the "lower portions of the three legs of frame structure 10 are not rigidly fixed in position one to the other but may be flexed to provide considerable freedom of movement and eliminate loss of energy caused by excessive working against a rigid frame in nonnal walking motions. Further, the frame material is suchthat a degree of give, or flexing, is available within the length of lateral legs 18 themselves, without regard to the remainder of the frame structure.
  • Frame structure 10 forms two supportcolumns 22 which are interconnected at lower foot 16.
  • Each of the support columns 22 extend upwardly from lower foot 16 and one of the lower ends and terminate in shoulder-adjacent portions 24.
  • the support columns are formed of a lateral leg and a portion of the central leg. However, with other constructions other structures can form the support columns.
  • frame structure 10 is contoured to conform to the profile of the human back. Shoulder-adjacent portions 24 extend forwardly from the general plane defined by frame structure 10 and lower foot 16 extends rearwardly therefrom. Such a contoured configuration not only conforms to the profile of the human back but allows connection of a packbag to frame structure 10 in a position more nearly directly above the primary support point, which is provided by lower foot 16. This is illustrated best by FIG. 5.
  • Packbag 26 is attached to support columns 22 at shoulder-adjacent portions 24. Such attachment may conveniently be accomplished by the use of inverted pockets 28 which are formed on the surface of packbag 26 in position to receive the tops of shoulder adjacent portions 24. Packbag 26 may be further secured to frame 10 at other points.
  • Lower foot 16 may be secured to the central portions of hip belt 30 by means of pocket 32 as shown in FIG. 5.
  • Pocket 32 or some other connection or securing means, assures that central leg 14 and its lower foot 16 will remain in a laterally fixed position with respect to. the packers hips, namely, at a position just below the juncture of the packers spine and pelvis.
  • Lower foot 16 may be free to pivot in pocket 32, about a fore-and-aft axis, to accommodate certain body movements.
  • Lower ends 20 of lateral legs 18 are joined to hip belt 30 at lateral positions by flexible connecting means 33, which include, rings 31 attached to lower ends 20, straps 34, and D-rings 37 which are sewn to belt 30. Each leg 18 passes through D-ring 37 but retains substantial freedom of movement.
  • Connecting means 33 I 6 strain on Frame 10. For example, in a forward bending motion, lower ends 20 of lateral legs 18 will tend to separate from hip belt 30. Connecting means 33 are of sufficient length to accommodate such body movement.
  • a belt-reinforcing strap 35 made of metal or some other rigid material, is sewn in a pocket of hip belt positioining it across the back of the packers hips and extending across the width of frame structure 10. Strap 35 may be used to prevent excessive squeezing together of lower ends 20, such as can tend to occur with very heavy loads. However, strap 35 does not interfere with the freedom of movement of lateral legs 18 provided by this invention.
  • lower ends 20 are in a position forward of the position of lower foot 16. This arrangement tends to distribute the weight around hip-engaging belt 30.
  • substantially rigid brace members 36 are coupled to shoulder-adjacent portions 24 of frame structure 10 and extend from frame structure 10 to terminate in free ends 28 which are generally aligned'with shoulder-engaging portions 40 of shoulder straps 42.
  • Brace members 36 are made of rigid or semirigid material suchthat they have substantially fixed dimensions between shoulder-engaging portions 24 and free ends 38. Free ends 38 are connected by flexible connectors 34 to the convex upper surfaces 46 of shoulder-engaging portions 40.
  • Shoulder straps 42 have first ends 48 which are connected to frame structure 10 near lower ends 20 and second ends 50 which are secured with respect to frame structure 10 at a level below shoulder-engaging portions 40, through strap 52 which extends from lower foot 16 upwardly to a slide loop 54. Second ends 50 of shoulder straps 42 are joined one to the other through slide loop 54 to allow for relative lengthening and shortening of shoulder straps 32 to accommodate various bodily movements.
  • shoulder straps and brace members used in thepreferred embodiments of this invention provide added stability to the load being carried and also provide spacing between frame structure 10 and the back of the packer. Such spacing is desirable to eliminate the discomforts of repetitive contact of back with frame and to provide the advantages of ventilation between back and load.
  • frame refers to a device having some rigidity used for mounting a pack bag. The term neither requires nor implies any specific shape, form or material.
  • a backpackers device comprising:
  • a frame structure having a central weight-bearing leg terminating in a lower foot, and two substantially flexible lateral weight-bearing legs, one on either side of said central leg, said lateral legs terminating in lower ends and connected to said central leg remote from said lower foot and lower ends whereby said lower foot and lower ends have relative freedom of movement, said frame structure forming interconnected support columns extending upwardly from said lower foot and lower ends and terminating in shoulder-adjacent portions and generally conforming to the profile of the human back;
  • connectors flexibly joining said belt and said lower ends of said lateral legs.
  • the device of claim 1 further comprising:
  • brace members coupled to said shoulder-adjacent portions of each of said support columns, said brace members extending from said frame structure and terminating in free ends generally aligned with said shoulder-engaging portions of said shoulder straps, said brace member being of substantially fixed dimensions between said shoulder-adjacent portions and said free ends;
  • the device of claim 5 further including a rigid beltreinforcing strap within said belt in position to extend across the back of the packers hips.
  • the device of claim 5 further including a pack bag attached to said frame structure at said shoulder-adjacent portions.
  • said straps including concavo-convex shoulder-engaging portions and having first ends attached to said frame structure near said lower ends of said lateral legs and second ends secured with respect to said frame structure at a level below said shoulder-engaging portions; substantially rigid brace members coupled to said shoulder-adjacent portions of said support columns, said brace members extending from said frame structure and terminating in free ends generally aligned with said shoulder-engaging portions of said shoulder straps, said brace members being of substantially fixed dimensions between said shoulder-adjacent portions and said free ends; and means connecting said free ends of said brace members with the convex surfaces of said shoulderengaging portions of said straps.
  • the device of claim 1 further comprising a rigid belt-reinforcing strap within said belt in position to extend across the back of the packers hips.
  • the device of claim 7 further including a pack bag attached to said frame structure at said shoulderadjacent portions.

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  • Portable Outdoor Equipment (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
US526544A 1974-11-25 1974-11-25 Backpacker{3 s device Expired - Lifetime US3923216A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US526544A US3923216A (en) 1974-11-25 1974-11-25 Backpacker{3 s device
CA240,248A CA1077899A (en) 1974-11-25 1975-11-24 Backpacker's device
GB48224/75A GB1526098A (en) 1974-11-25 1975-11-24 Backpackers device
ZA757403A ZA757403B (en) 1974-11-25 1975-11-25 Backpacker's device
SE7513260A SE405198B (sv) 1974-11-25 1975-11-25 Ryggberanordning innefattande en ram med viktberande ben
DE19752553729 DE2553729A1 (de) 1974-11-25 1975-11-27 Rueckentraggestell

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US526544A US3923216A (en) 1974-11-25 1974-11-25 Backpacker{3 s device
DE19752553729 DE2553729A1 (de) 1974-11-25 1975-11-27 Rueckentraggestell
FR7536847A FR2333464A1 (fr) 1975-11-27 1975-12-02 Dispositif de sac a dos

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US3923216A true US3923216A (en) 1975-12-02

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Application Number Title Priority Date Filing Date
US526544A Expired - Lifetime US3923216A (en) 1974-11-25 1974-11-25 Backpacker{3 s device

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US (1) US3923216A (de)
DE (1) DE2553729A1 (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2333464A1 (fr) * 1975-11-27 1977-07-01 Camp Trails Co Dispositif de sac a dos
US5090604A (en) * 1990-07-24 1992-02-25 The North Face Backpack device
US5236112A (en) * 1991-07-31 1993-08-17 Mont-Bell Co., Ltd. Back bag
US5341974A (en) * 1992-06-19 1994-08-30 Mont-Bell Co., Ltd. Back bag
EP0821895A1 (de) * 1996-07-30 1998-02-04 Big Pack GmbH Rucksack
WO1999002067A1 (en) * 1997-07-11 1999-01-21 K-2 Corporation External frame backpack harness
US20040108350A1 (en) * 2002-11-22 2004-06-10 Bruce Warren External Frame Backpack
US20060011689A1 (en) * 2003-03-14 2006-01-19 Reid Lawrence C Backpack suspension system
EP1618813A2 (de) * 2004-07-20 2006-01-25 Haglöfs Scandinavia AB Rucksack-Hüftgurt
US20080164293A1 (en) * 2003-08-12 2008-07-10 Matthieu Foissac Rucksack With a Belt Assembly Enabling Angular Pivoting
US20080203128A1 (en) * 2006-11-29 2008-08-28 Bass Gregory Backpack suspension system with hub
US20120012629A1 (en) * 2010-07-15 2012-01-19 Deuter Sport Gmbh & Co. Kg Backpack Having Removable Frame
US20150342325A1 (en) * 2014-02-04 2015-12-03 Michael J. Wright Backpack frame insert
US11369185B2 (en) * 2019-07-03 2022-06-28 Jansport Apparel Corp. Multi-use pack stay

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4222386C2 (de) * 1992-07-08 1995-11-02 Lothar Spiegler Rucksack mit aussteifendem Trägerteil
AU674794B2 (en) * 1993-11-15 1997-01-09 Alfred Jawad Convertible backpack device
DE29618580U1 (de) * 1996-07-30 1996-12-05 Big Pack GmbH, 73266 Bissingen Rucksack

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3246644A (en) * 1965-04-09 1966-04-19 Peter M Olson Portable water heater
US3327788A (en) * 1964-12-23 1967-06-27 Kolpe Olof Harness for earth boring machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3327788A (en) * 1964-12-23 1967-06-27 Kolpe Olof Harness for earth boring machine
US3246644A (en) * 1965-04-09 1966-04-19 Peter M Olson Portable water heater

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2333464A1 (fr) * 1975-11-27 1977-07-01 Camp Trails Co Dispositif de sac a dos
US5090604A (en) * 1990-07-24 1992-02-25 The North Face Backpack device
US5236112A (en) * 1991-07-31 1993-08-17 Mont-Bell Co., Ltd. Back bag
US5341974A (en) * 1992-06-19 1994-08-30 Mont-Bell Co., Ltd. Back bag
EP0821895A1 (de) * 1996-07-30 1998-02-04 Big Pack GmbH Rucksack
US5904282A (en) * 1996-08-14 1999-05-18 K-2 Corporation External frame backpack harness
WO1999002067A1 (en) * 1997-07-11 1999-01-21 K-2 Corporation External frame backpack harness
US20040108350A1 (en) * 2002-11-22 2004-06-10 Bruce Warren External Frame Backpack
US7287677B2 (en) 2003-03-14 2007-10-30 The North Face Apparel Corp. Backpack suspension system
US20060011689A1 (en) * 2003-03-14 2006-01-19 Reid Lawrence C Backpack suspension system
US20080245835A1 (en) * 2003-03-14 2008-10-09 The North Face Apparel Corp. Backpack suspension system
CN100446693C (zh) * 2003-08-12 2008-12-31 普罗迈尔斯公司 具有角转动式腹带的背包
US20080164293A1 (en) * 2003-08-12 2008-07-10 Matthieu Foissac Rucksack With a Belt Assembly Enabling Angular Pivoting
US7770766B2 (en) * 2003-08-12 2010-08-10 Decathlon Rucksack with a belt assembly enabling angular pivoting
EP1618813A3 (de) * 2004-07-20 2006-05-10 Haglöfs Scandinavia AB Rucksack-Hüftgurt
EP1618813A2 (de) * 2004-07-20 2006-01-25 Haglöfs Scandinavia AB Rucksack-Hüftgurt
US20080203128A1 (en) * 2006-11-29 2008-08-28 Bass Gregory Backpack suspension system with hub
US7967175B2 (en) 2006-11-29 2011-06-28 The North Face Apparel Corp. Backpack suspension system with hub
US20120012629A1 (en) * 2010-07-15 2012-01-19 Deuter Sport Gmbh & Co. Kg Backpack Having Removable Frame
US9131762B2 (en) * 2010-07-15 2015-09-15 Deuter Sport Gmbh Backpack having removable frame
US20150342325A1 (en) * 2014-02-04 2015-12-03 Michael J. Wright Backpack frame insert
US11369185B2 (en) * 2019-07-03 2022-06-28 Jansport Apparel Corp. Multi-use pack stay

Also Published As

Publication number Publication date
DE2553729A1 (de) 1977-06-02

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Legal Events

Date Code Title Description
AS Assignment

Owner name: JOHNSON CAMPING, INC., A CORP OF DELAWARE

Free format text: MERGER;ASSIGNOR:CAMP TRAILS COMPANY, A CORP OF DE.;REEL/FRAME:004519/0959

Effective date: 19800604

AS Assignment

Owner name: JOHNSON CAMPING, INC., A CORP. OF DE.

Free format text: MERGER;ASSIGNOR:CAMP TRAILS COMPANY;REEL/FRAME:004520/0419

Effective date: 19801010