Patent US4463057A successfully refreshed from Google Patents.
US4463057A
Expired / Lapsed
US
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Extruded section bar member
Assignee: Individual
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Filing: 1982-08-20
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Granted: 1984-07-31
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Expires: 2002-08-20
Abstract
Abstract An extruded section bar member for use as a vertical support in furniture, particularly in industrial and office furniture, comprising a cross section corresponding to an elongated rectangle with rounded edges and including T-grooves recessed into its long sides for receiving fastening elements.
Inventors
- 👤 Hans Knurr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:10
CPC Classifications
A; A47; A47B; A47B96/00; A47B96/14; A47B96/1466; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12201; Y10T428/12215; Y10T428/12229; Y10T428/12264; Y10T428/12354; Y10T428/12382
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
78 words
Extruded section bar member of metal for use as a vertical support in industrial and office furniture, characterized in that the bar member has in cross section a shape corresponding substantially to an elongated rectangle of which the short sides of said rectangle are rounded and which has at least two T-shaped grooves recessed into each of the long sides of said rectangle, projecting into the section interior, and extending along the entire height of the section member.
Claim 2
Dependent Claim
78 words
Extruded section bar member of metal for use as a vertical support in industrial and office furniture, characterized in that the bar member has in cross section a shape corresponding substantially to an elongated rectangle of which the short sides of said rectangle are rounded and which has at least two T-shaped grooves recessed into each of the long sides of said rectangle, projecting into the section interior, and extending along the entire height of the section member.
Claim 3
Dependent Claim
31 words
Extruded section bar member as in claim 1, characterized by a continuous transition from the long sides to the rounded end or short sides of the cross section of bar member.
Claim 4
Dependent Claim
21 words
Extruded section bar member as in claim 1, characterized in that rounded end or short sides are semicircular in cross section.
Claim 5
Dependent Claim
29 words
Extruded section bar member as in claim 1, characterized in that T-shaped grooves are provided in the end area of long sides adjoining said rounded end or short sides.
Claim 6
Dependent Claim
27 words
Extruded section bar member as in claim 1, characterized by another T-shaped groove provided centrally between the T-shaped grooves in the end area of each long side.
Claim 7
Dependent Claim
37 words
Extruded section bar member as in claim 1, characterized in that bar member comprises a hollow section bar member having a wall thickness of about 10% to 20% of the longitudinal dimension of the elongated cross-sectional rectangle.
Claim 8
Dependent Claim
57 words
Extruded section bar member as in claim 6, characterized in that T-shaped grooves are arranged in pairs such that each T-shaped groove in one long side is directly opposite a T-shaped groove in the other long side and that at least one connecting web is provided between the two T-shaped grooves of each pair of T-shaped grooves.
Claim 9
Dependent Claim
46 words
Extruded section bar member as in claim 7, characterized by two spaced connecting webs between at least the two T-shaped grooves of a pair of T-shaped grooves central in long sides, the mutually facing surfaces of said connecting webs being configured to create a circular opening.
Claim 10
Dependent Claim
57 words
Extruded section bar member as in claim 7, characterized in that connecting web between the two T-shaped grooves in the end area of long sides has two clamp- or grip-like projections extending into the space surrounded by the respective rounded end or short side, whereby each connecting web and said grip-like projections define a horse-shoe-shaped cross-sectional configuration.
Claim 11
Dependent Claim
25 words
Extruded section bar member as in claim 9, characterized in that said grip-like projections extend in parallel with the rounded end or short side walls.
Claim 12
Dependent Claim
27 words
Extruded section bar member as in claim 10, characterized in that in case said end or short side walls are semicircular said grip-like projections are concentric therewith.
Claim 13
Dependent Claim
40 words
Extruded section bar member as in claim 1, characterized in that the extruded section bar member has dimensions of about 120 millimeters for the long side and of about 30 millimeters for the transverse side of the elongated cross-sectional rectangle.
Claim 14
Dependent Claim
23 words
Extruded section bar member as in claim 6, characterized in that hollow section bar member has a wall thickness of about two millimeters.
Claim 15
Dependent Claim
23 words
Extruded section bar member as in claim 6, characterized in that hollow section bar member has a wall thickness of about 1.8 millimeter.
Claim 16
Dependent Claim
29 words
Extruded section bar member as in claim 6, characterized in that the wall thickness of the peripheral portions in the area of the T-shaped grooves is about 2.3 millimeters.
Claim 17
Dependent Claim
27 words
Extruded section bar member as in claim 6, characterized by free spaces formed between adjacent pairs of T-shaped grooves, said free spaces being substantially rectangular in shape.
Claim 18
Dependent Claim
37 words
Extruded section bar member as in claim 16, characterized in that free spaces each have dimensions of about 26 millimeters in the transverse direction and of about 20 millimeters in the longitudinal direction of the cross-sectional rectangle.
Claim 19
Dependent Claim
28 words
Extruded section bar member as in claim 6, characterized by a circular recess formed in the interior of said horse shoe-shaped configuration between grip-like projections and connecting webs.
Claim 20
Dependent Claim
43 words
Extruded section bar member as in claim 18, characterized in that circular recess has an open portion formed between the free ends of projections and facing said end or short sides, with said open portion including a central angle of about 60 degrees.
References Cited (Backward Citations)
US1031000A
Cited
US4005255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |