Patent US3943675A successfully refreshed from Google Patents.
US3943675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grating
Assignee: Individual
•
Filing: 1975-03-11
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Granted: 1976-03-16
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Expires: 1995-03-11
Abstract
Abstract A grating assembly comprises a plurality of inverted T-shaped cross pieces 2 each having a plurality of slots 3 in the upper flange. The slots have convexly curved central walls 4. A plurality of transverse profile bars 1 have curved lower flange portions 1c that engage in the slot curvatures when assembled. The latter is implemented by bending the pieces 2 to open the slot mouths and facilitate the bar insertions.
Inventors
- 👤 Otto Wyss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:23
CPC Classifications
B; B21; B21D; B21D47/00; B21D47/005; E; E04; E04C; E04C2/00; E04C2/30; E04C2/42; E04C2/421; E04C2/422; E04C2/423; E04F; E04F19/00; E04F19/10; F; F23; F23G; F23G2205/00; F23G2205/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
121 words
A grating composed of interlocking and disassemblable longitudinal profile bars and slotted cross pieces, said cross pieces having an upper edge and intended for coverings, sheathings, etc., characterized in that the slots (3) punched in the cross pieces (2) extend from said upper edge and comprise a hollow defined by curved walls (4) at a certain distance from the upper edge (2a), in that the longitudinal profile bars (1) are without slots and their parts which engage in the slots of the cross pieces (2) comprise a wall part (1c) which is bent to one side, the convex side of this wall part is elastically compressed and frictionally bound against the one wall (4) of the hollow of the slot (3).
Claim 2
Dependent Claim
121 words
A grating composed of interlocking and disassemblable longitudinal profile bars and slotted cross pieces, said cross pieces having an upper edge and intended for coverings, sheathings, etc., characterized in that the slots (3) punched in the cross pieces (2) extend from said upper edge and comprise a hollow defined by curved walls (4) at a certain distance from the upper edge (2a), in that the longitudinal profile bars (1) are without slots and their parts which engage in the slots of the cross pieces (2) comprise a wall part (1c) which is bent to one side, the convex side of this wall part is elastically compressed and frictionally bound against the one wall (4) of the hollow of the slot (3).
Claim 3
Dependent Claim
85 words
A process for producing the grating as claimed in claim 1, wherein the slotted cross pieces (2) are elastically bent by clamping them on a convex molded body (6) in such a way that the upper sides of the slots (3) are widened and the longitudinal profile bars (1) are then inserted in the widened slots and the cross pieces (2) are subsequently released, the slots (3) thus being reduced to their original dimensions and clamping the longitudinal profile bars (1) in a flexible manner.
Claim 4
Dependent Claim
184 words
A grating composed of interlocking and disassemblable longitudinal profile bars and slotted cross pieces, said cross pieces having an upper edge, and intended for coverings, sheathings, etc., characterized in that the slots (3) punched in the cross pieces (2) extend from said upper edge and comprise a hollow defined by curved walls (4) at a certain distance from the upper edge (2a), in that the longitudinal profile bars (1) are without slots and their parts which engage in the slots of the cross pieces (2) comprise a wall part (1c) which is bent to one side, the convex side of this wall part is elastically compressed and frictionally bound against the one wall (4) of the hollow of the slot (3), said cross pieces having a T-shaped cross section, characterized in that the flange (2b) of the cross-pieces (2) is enclosed by a bar (7) having a C-shaped cross section and a gap (8), into which wedges (9) are pressed at both ends, and is thus formed between the flange (2b) of the cross piece and the flange (7a) of the C-shaped bar (7).
Claim 5
Dependent Claim
184 words
A grating composed of interlocking and disassemblable longitudinal profile bars and slotted cross pieces, said cross pieces having an upper edge, and intended for coverings, sheathings, etc., characterized in that the slots (3) punched in the cross pieces (2) extend from said upper edge and comprise a hollow defined by curved walls (4) at a certain distance from the upper edge (2a), in that the longitudinal profile bars (1) are without slots and their parts which engage in the slots of the cross pieces (2) comprise a wall part (1c) which is bent to one side, the convex side of this wall part is elastically compressed and frictionally bound against the one wall (4) of the hollow of the slot (3), said cross pieces having a T-shaped cross section, characterized in that the flange (2b) of the cross-pieces (2) is enclosed by a bar (7) having a C-shaped cross section and a gap (8), into which wedges (9) are pressed at both ends, and is thus formed between the flange (2b) of the cross piece and the flange (7a) of the C-shaped bar (7).
References Cited (Backward Citations)
US2031779A
Cited
US3469359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |