US4487528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth anchoring expansion body having folded sheet metal casing
Assignee: SKOGBERG
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Filing: 1982-11-05
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Granted: 1984-12-11
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Expires: 2002-11-05
Abstract
Abstract An expansion body for constructions like piles or anchorages located in the earth, said body being adapted for insertion into the ground in a compact shape and expanded therein to an expanded shape. The expansion is achieved by unfolding a folded sheet metal casing (11) by filling it up with pressurized fluid. The sheet metal casing which defines two opposed portions (16, 17) is folded in a zigzag shape before the expansion with the folds (18) of one portion (16) falling into the folds (19) of the other portion (17).
Inventors
- 👤 Bo T. Skogberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:50
CPC Classifications
E; E21; E21D; E21D21/00; E21D21/0026; E21D21/0073
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
110 words
Expansion body for anchoring constructions in the earth, comprising: a folded elongated sheet metal casing (11) which defines an internal closed space (15); means (14) for coupling internal closed space (15) to a source of pressurized fluid for the expansion of the expansion body by the pressing out of the folds (18, 19) of the sheet metal casing under the pressure of said pressurized fluid; said sheet metal casing comprising opposed portions (16, 17), which before said expansion have said folds (18, 19) thereof arranged in zigzag shape with the folds (18) of one of said portions (16) falling into the folds (19) of the other of said portions (17).
Claim 2
Dependent Claim
110 words
Expansion body for anchoring constructions in the earth, comprising: a folded elongated sheet metal casing (11) which defines an internal closed space (15); means (14) for coupling internal closed space (15) to a source of pressurized fluid for the expansion of the expansion body by the pressing out of the folds (18, 19) of the sheet metal casing under the pressure of said pressurized fluid; said sheet metal casing comprising opposed portions (16, 17), which before said expansion have said folds (18, 19) thereof arranged in zigzag shape with the folds (18) of one of said portions (16) falling into the folds (19) of the other of said portions (17).
Claim 3
Dependent Claim
31 words
The expansion body of claim 1, wherein each fold (18) in one of said portions (16) falls into or is enclosed by a mating fold (19) in an opposed portion (17).
Claim 4
Dependent Claim
28 words
The expansion body of claim 1 or 2, wherein said folds (18, 19) of said opposed portions (16, 17) before said expansion are tightly adjacent to each other.
Claim 5
Dependent Claim
49 words
The expansion body of claim 1, further comprising clamping means (12, 13) on each end part of said elongated sheet metal casing (11) for holding said end parts in said zigzag shape when the other parts of said casing (11) are expanded under the pressure of said pressurized fluid.
Claim 6
Dependent Claim
30 words
The expansion body of claim 4, further comprising anti-friction means (23) arranged between one or more of said folds (18, 19) in the clamped end parts of the casing (11).
Claim 7
Dependent Claim
28 words
The expansion body of claim 4 or 5, wherein said clamping means (12, 13) comprises an elongated member (21, 22; 27, 28, 29) penetrating said folds (18, 19).
Claim 8
Dependent Claim
24 words
The expansion body of claim 6, wherein said elongated member is a bolt penetrating said folds at the clamped end parts of the casing.
Claim 9
Dependent Claim
27 words
The expansion body of claim 5, wherein said anti-friction means (23) is arranged between each of said adjacent folds in said clamped end parts of said casing.
Claim 10
Dependent Claim
31 words
The expansion body of claim 1, further comprising a load carrying rod (25) connected to said body for transferring tensile or compressive forces acting on the rod (25) to the body.
Claim 11
Dependent Claim
27 words
The expansion body of claim 9, wherein said load carrying rod (25) is tubular in shape and projects into said closed space (15) of said casing (11).
Claim 12
Dependent Claim
22 words
The expansion body of claim 9, wherein said load carrying rod (25) projects into said closed space (15) of said casing (11).
Claim 13
Dependent Claim
49 words
The expansion body of claim 2, further comprising clamping means (12, 13) on each end part of said elongated sheet metal casing (11) for holding said end parts in said zigzag shape when the other parts of said casing (11) are expanded under the pressure of said pressurized fluid.
Claim 14
Dependent Claim
30 words
The expansion body of claim 12, further comprising anti-friction means (23) arranged between one or more of said folds (18, 19) in the clamped end parts of the casing (11).
Claim 15
Dependent Claim
49 words
The expansion body of claim 3, further comprising clamping means (12, 13) on each end part of said elongated sheet metal casing (11) for holding said end parts in said zigzag shape when the other parts of said casing (11) are expanded under the pressure of said pressurized fluid.
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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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |