Patent US3734366A successfully refreshed from Google Patents.
US3734366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pack frame
Assignee: Individual
•
Filing: 1972-02-11
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Granted: 1973-05-22
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Expires: 1992-02-11
Abstract
Abstract A lightweight pack frame constructed of rigid polyvinyl chloride or like material including in one embodiment a molded U-shaped major support member, the legs of the ''''U'''' being joined by a curved, transverse extending support member which is adjustably mounted thereon to allow the size of the pack frame to be changed. A pair of flexible rods are end mounted to extend between the lower portion of the U-shaped major support member and the transverse support member such that they are bowed outwardly from the plane of the U-shaped support member to springingly hold a pack bag mounted on the frame away from the wearer''s back.
Inventors
- 👤 T Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:42
CPC Classifications
A; A45; A45F; A45F3/00; A45F3/04; A45F3/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
116 words
A pack frame for supporting a pack bag comprising: a molded substantially U-shaped major support member including a pair of upstanding parallel legs and a curved bottom portion; a transverse support member curved generally in the shape of the bottom portion of said U-shaped major support member and mounted to extend between said upstanding legs at a distance from said curved bottom portion; and a pair of flexible rods end mounted in cooperatingly sized holes in the legs and the transverse member to extend between the legs of said major support member and said transverse support member and resiliently bowed to support said pack bag at a distance outwardly from said major and transverse support members.
Claim 2
Dependent Claim
116 words
A pack frame for supporting a pack bag comprising: a molded substantially U-shaped major support member including a pair of upstanding parallel legs and a curved bottom portion; a transverse support member curved generally in the shape of the bottom portion of said U-shaped major support member and mounted to extend between said upstanding legs at a distance from said curved bottom portion; and a pair of flexible rods end mounted in cooperatingly sized holes in the legs and the transverse member to extend between the legs of said major support member and said transverse support member and resiliently bowed to support said pack bag at a distance outwardly from said major and transverse support members.
Claim 3
Dependent Claim
60 words
The pack frame of claim 1 wherein said upstanding parallel legs include a plurality of longitudinally spaced pairs of holes, said transverse member mountable by means of pins positioned to extend through said transverse member and through selected pairs of said holes to vary said distance between said transverse member and said curved bottom portion of said major support member.
Claim 4
Dependent Claim
71 words
The pack frame of claim 1 wherein said U-shaped major support member, said transverse support member and said flexible bowed rods are constructed of single unitary pieces of rigid polyvinyl chloride having a specific gravity of approximately 1.5, a tensile strength of approximately 9,000 psi, an impact strength of about 15 ft.lbs/in. notch and a hardness of approximately 83 Shore D, to obtain a pack frame having high degree of flexibility.
Claim 5
Dependent Claim
26 words
The pack frame of claim 1 wherein said pair of flexible rods are end mounted in cooperatingly sized holes in said pair of upstanding parallel legs.
Claim 6
Dependent Claim
46 words
The pack frame of claim 1 wherein said transverse support member includes end mounted pairs of fittings having transversely extending cylindrical portions, said transverse portions sized to receive said upstanding parallel legs, and means removably interconnecting said fittings and said upstanding legs at selected points therealong.
Claim 7
Dependent Claim
29 words
The pack frame of claim 1 including a second transverse support member including a pair of downwardly extending leg portions slidably mountable within said pair of upstanding parallel legs.
Claim 8
Dependent Claim
110 words
An all plastic flexible pack frame for supporting a pack bag comprising: a heat molded substantially U-shaped major support member having a pair of upstanding parallel legs and a curved bottom portion formed from a single hollow length of polyvinyl chloride tubing; a curved transverse support member mounted to extend between the legs of said U-shaped major support member and slidably adjustable thereon; and a pair of flexible rods end mounted on and extending between the parallel legs of said U-shaped support member and said transverse support member and bowed to extend outwardly from the plane of said U-shaped support member and said transverse support member to support said bag.
Claim 9
Dependent Claim
110 words
An all plastic flexible pack frame for supporting a pack bag comprising: a heat molded substantially U-shaped major support member having a pair of upstanding parallel legs and a curved bottom portion formed from a single hollow length of polyvinyl chloride tubing; a curved transverse support member mounted to extend between the legs of said U-shaped major support member and slidably adjustable thereon; and a pair of flexible rods end mounted on and extending between the parallel legs of said U-shaped support member and said transverse support member and bowed to extend outwardly from the plane of said U-shaped support member and said transverse support member to support said bag.
Claim 10
Dependent Claim
106 words
A plastic pack frame for supporting a pack bag comprising: a first pair of vertically extending laterally spaced support members molded along their length to a flattened ''''S'''' configuration; a second pair of vertically spaced curved support members extending transversely between said first pair of vertically extending support members and including means for adjustably mounting said curved support members thereon; and a pair of flexible rods end mounted on and extending between one of said transversely extending curved support members and said pair of vertically extending support members and bowed to extend outward from the plane of said support members to resiliently support a pack bag.
Claim 11
Dependent Claim
106 words
A plastic pack frame for supporting a pack bag comprising: a first pair of vertically extending laterally spaced support members molded along their length to a flattened ''''S'''' configuration; a second pair of vertically spaced curved support members extending transversely between said first pair of vertically extending support members and including means for adjustably mounting said curved support members thereon; and a pair of flexible rods end mounted on and extending between one of said transversely extending curved support members and said pair of vertically extending support members and bowed to extend outward from the plane of said support members to resiliently support a pack bag.
Claim 12
Dependent Claim
63 words
The plastic pack frame of claim 8 wherein said pair of vertically extending support members include a plurality of vertically spaced holes, at least one of said vertically spaced support members mountable by means of pins positioned to extend through said vertically spaced support member and through selected pairs of said holes to vary the vertical spacing between said vertically spaced support members.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |