Patent US5389810A successfully refreshed from Google Patents.
US4579233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable knockdown tray assembly
Assignee: Individual
•
Filing: 1984-08-09
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Granted: 1986-04-01
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Expires: 2004-08-09
Abstract
Abstract A knockdown tray assembly comprising a plurality of horizontal rectangular trays made of paperboard or cardboard from a one-piece blank and supporting members formed by interfitting a T-beam bracing member over a comparable T-beam by the interfitting of a pin on the top of the beam with a socket at the bottom beam at the center, these beams serving as a cross brace below the tray and each of the beams having a double socket at the end with a supporting web, these double sockets adapted to receive tubular members which are supported on the webs. The sockets each have a flange and each of the trays has a hole cut out at the corners for the insertion of the socket. Tubular posts fit in each socket above and below the trays to form the assembled rack useful for storage or display. The trays are different from the ordinary cardboard trays in that they are free from metal fasteners and have cut-outs at the corners which adapt them to serve as the shelves to bear substantial loads in a shelf system in which there are no locking parts.
Inventors
- 👤 James Hepp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:16
CPC Classifications
A; A47; A47B; A47B47/00; A47B47/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
147 words
A knockdown assembly comprising: a generally rectangular paperboard or cardboard tray made from a one-piece blank which is free from fastening elements and having cut-out circular corner portions to receive a tubular post; a tubular post at each cut-out circular portion; a tray cross-arm support structure consisting of two T-shaped arms pivoted at their center having a pin and boss pivot and provided with double sockets at the corners; each socket adapted to receive at the upper and lower ends thereof a tubular post at each corner of the tray which supports the tray of the assembly; each socket being provided with a flange extending beyond the cut-out portion of the tray and below the tray with the socket in place whereby the tray loaded with a container will be supported at the corners by the flange and at the center by the tray crossarm support structure.
Claim 2
Dependent Claim
147 words
A knockdown assembly comprising: a generally rectangular paperboard or cardboard tray made from a one-piece blank which is free from fastening elements and having cut-out circular corner portions to receive a tubular post; a tubular post at each cut-out circular portion; a tray cross-arm support structure consisting of two T-shaped arms pivoted at their center having a pin and boss pivot and provided with double sockets at the corners; each socket adapted to receive at the upper and lower ends thereof a tubular post at each corner of the tray which supports the tray of the assembly; each socket being provided with a flange extending beyond the cut-out portion of the tray and below the tray with the socket in place whereby the tray loaded with a container will be supported at the corners by the flange and at the center by the tray crossarm support structure.
Claim 3
Dependent Claim
37 words
A knockdown tray assembly as claimed in claim 1, wherein said posts are formed of high strength paper and wherein said sockets include guiding means to align the posts above and below the sockets with each other.
Claim 4
Dependent Claim
52 words
A knockdown tray assembly as in claim 2, wherein said pivot in the center of said tray cross-arm support structure comprises a pivot pin at the center of one of the T-shaped arms and a depending boss into which said pin fits which is secured to the other of the T-shaped arms.
Claim 5
Dependent Claim
33 words
A knockdown tray assembly as claimed in claim 3 wherein said T-shaped arms are provided with reinforcing ribs along the vertical flange of each of said arms in order to strengthen these arms.
Claim 6
Dependent Claim
38 words
A knockdown tray assembly as claimed in claim 3 wherein said guiding means includes a spider which guides the bottom of the post and a web at the center of the socket upon which the post is seated.
Claim 7
Dependent Claim
39 words
A knockdown tray assembly as claimed in claim 5 wherein one T-shaped arm is provided with a U-shaped bridge element to serve as a stabilizer member in the scissors manipulation of the T-shaped arms of the cross-arm support structure.
Claim 8
Dependent Claim
30 words
A knockdown tray assembly as claimed in claim 6 wherein one of said T-shaped arms is provided adjacent the pivot with strengthening ribs in order to adjust to heavy loads.
Claim 9
Dependent Claim
37 words
A knockdown tray assembly as claimed in claim 7 in which one of said T-shaped arms is provided with a groove and a strengthening bar in the horizontal flange thereof to accommodate heavier loads on said tray.
Claim 10
Dependent Claim
19 words
A knockdown tray assembly as claimed in claim 1 wherein said tray is coated with a protective water-proof coating.
Claim 11
Dependent Claim
41 words
A knockdown tray assembly as claimed in claim 1 including a plurality of trays, each with corner posts in the corresponding sockets supported by hollow tubular waterproof legs fitting in the bottom socket portions of the lowermost tray cross-arm support structure.
References Cited (Backward Citations)
US982538A
Cited
US1572340A
Cited
US2469232A
Cited
US2591049A
Cited
US3053397A
Cited
US3095093A
Cited
US3141554A
Cited
US3172542A
Cited
US3426913A
Cited
US3480154A
Cited
US3490602A
Cited
US3784083A
Cited
US3955681A
Cited
US4428487A
Cited
US4467927A
Cited
US4480756A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |