US4750654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Back pack with reinforced front panel
Assignee: SACS MILLET SA
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Filing: 1987-05-07
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Granted: 1988-06-14
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Expires: 2007-05-07
Abstract
Abstract A backpack having a front panel normally riding on the back of the wearer according to this invention has a front panel which is vertically elongated and which is formed of an at least semirigid shell having a shape generally complementary to that of the back of the wearer and constucted to be relatively bendable longitudinally and relatively stiff transversely. Thus the panel can bend forward and back, that is about a horizontal axis, but cannot flex about a vertical axis. This is achieved by forming the shell with transverse rigidifying formations so it is longitudinally relatively bendable and transversely relatively stiff. These formations according to this invention are ridges or grooves.
Inventors
- 👤 Marc Menetrier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:32
CPC Classifications
A; A45; A45F; A45F3/00; A45F3/04; Y; Y10; Y10S; Y10S224/00; Y10S224/907
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
129 words
A backpack comprising: a bag having a front and a back; and a vertically elongated shell at the front formed with transversely extending rigidifying formations, the shell being longitudinally relatively bendable and transversely relatively stiff, the shell also being forwardly concave and generally of U-shape seen from above so as to fit generally complementarily to a back of a wearer of the pack with the shell normally upright, the shell comprising a relatively rigid piece of high-density cellular synthetic resin extending the full vertical length of the shell and having a front face turned toward the back of the wearer, a layer of a relatively soft low-density cellular synthetic resin integrally bonded to and covering the entire front face, and a flexible textile covering overlying the soft resin layer.
Claim 2
Dependent Claim
129 words
A backpack comprising: a bag having a front and a back; and a vertically elongated shell at the front formed with transversely extending rigidifying formations, the shell being longitudinally relatively bendable and transversely relatively stiff, the shell also being forwardly concave and generally of U-shape seen from above so as to fit generally complementarily to a back of a wearer of the pack with the shell normally upright, the shell comprising a relatively rigid piece of high-density cellular synthetic resin extending the full vertical length of the shell and having a front face turned toward the back of the wearer, a layer of a relatively soft low-density cellular synthetic resin integrally bonded to and covering the entire front face, and a flexible textile covering overlying the soft resin layer.
Claim 3
Dependent Claim
13 words
The backpack defined in claim 1 wherein the formations are ridges or grooves.
Claim 4
Dependent Claim
23 words
The backpack defined in claim 1 wherein the shell has a rim and the bag is secured to the shell at the rim.
References Cited (Backward Citations)
US4420103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-14 | 1991-12-14 | 1992-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-14 | 1995-12-14 | 1996-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-14 | 1999-12-14 | 2000-06-14 | $7700.00 | Window Closed / Lapsed |