Patent US3873219A successfully refreshed from Google Patents.
US3873219A
Expired / Lapsed
US
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Demountable structure
Assignee: Individual
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Filing: 1972-10-31
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Granted: 1975-03-25
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Expires: 1992-10-31
Abstract
Abstract A demountable structure, for example for forming scaffolding, shelf assemblies or frame assemblies comprises a pair of co-axial spaced connection members with a connection element interposed between the end edges of the connection member. A screw or other means extends between the connection members and clamps the end edges thereof onto the connection element. The connection element is associated with, for example, a shelf or cross-member, and a plurality of connection elements can be collectively interposed between the connection members so as to form a connection for a plurality of concurrent cross-members or the like.
Inventors
- 👤 Giancarlo Pofferi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:01
CPC Classifications
E; E04; E04G; E04G7/00; E04G7/02; E04G7/26; A; A47; A47B; A47B47/00; A47B47/02; A47B47/03; A63; A63H; A63H33/00; A63H33/04; A63H33/10; A63H33/105; A63H33/106; A63H33/107; A63H33/108; E04G7/30; F; F16; F16B; F16B12/00; F16B12/40; F16B12/42; F16B7/00; F16B7/04; F16B7/044; F16B7/048; F16B7/0486; F16B7/18; A47B87/00; A47B87/02; A47B87/0207; A47B87/0223; A47B2087/023; A47B2087/0238; F16B7/0446; Y; Y10; Y10T; Y10T403/00; Y10T403/34; Y10T403/341; Y10T403/342; Y10T403/44; Y10T403/447
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
146 words
A demountable supporting structure comprising a plurality of connection members, each of which includes an internal partition defining a threaded opening therein and an edge portion having a frusto-conical inner surface that is circular in cross-section about an axis of said connection member, a plurality of connection elements interposed between and intersecting the connection members, said connection elements having frustoconical annular walls engaged by said inner surfaces, each connection element being formed by a plurality of segments adjoining each other along angularly displaced surfaces directed radially of said axis said surfaces carrying respective projections and recesses by which the segments are interlocked, and screw means extending transversely from the connection elements and axially into the connection members for threadedly engaging the partitions therein whereby the connection members can be secured to the connection elements and stiffened by a rotational force applied externally to said connection members.
Claim 2
Dependent Claim
146 words
A demountable supporting structure comprising a plurality of connection members, each of which includes an internal partition defining a threaded opening therein and an edge portion having a frusto-conical inner surface that is circular in cross-section about an axis of said connection member, a plurality of connection elements interposed between and intersecting the connection members, said connection elements having frustoconical annular walls engaged by said inner surfaces, each connection element being formed by a plurality of segments adjoining each other along angularly displaced surfaces directed radially of said axis said surfaces carrying respective projections and recesses by which the segments are interlocked, and screw means extending transversely from the connection elements and axially into the connection members for threadedly engaging the partitions therein whereby the connection members can be secured to the connection elements and stiffened by a rotational force applied externally to said connection members.
Claim 3
Dependent Claim
23 words
The structure of claim 1, wherein said screw means comprises a one-piece integrally formed elongated stem that threadedly engages two successive connection members.
Claim 4
Dependent Claim
31 words
The structure of claim 1, further comprising a plurality of similar horizontal and vertical connection members, said connection members being generally tubular, the connection elements being interposed between the connection members.
Claim 5
Dependent Claim
20 words
The structure of claim 1, wherein the connection elements define displaced annular wall portions for engagement by said edge portions.
Claim 6
Dependent Claim
27 words
The structure of claim 1, wherein there is a plurality of connection members of equal length, a plurality of equal angles being defined between successive connection members.
Claim 7
Dependent Claim
12 words
The structure of claim 5, wherein said equal angles are each 60*.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |