US4062913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reinforcing concrete with fibres
Assignee: Institute for Innovationsteknik AB
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Filing: 1975-07-17
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Granted: 1977-12-13
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Expires: 1995-07-17
Abstract
Abstract The invention relates to the reinforcement of material with fibres, whereby the fibres are orientated by means of electrical fields. In this way, the fibres can also be concentrated on places which are especially subjected to stress so that a considerably greater strength increase is obtained from a smaller amount of reinforcement fibres than used in conventional methods.
Inventors
- 👤 Arvo Ivar Miller
- 👤 Fritz Rune Bjorklund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:13
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/52; B28B1/523
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
34 words
A method for reinforcing concrete comprising: introducing steel fibers randomly into a mass of unset concrete, and orienting the steel fibers in a desired direction by subjecting the steel fibers to a magnetic field.
Claim 2
Independent Claim
34 words
A method for reinforcing concrete comprising: introducing steel fibers randomly into a mass of unset concrete, and orienting the steel fibers in a desired direction by subjecting the steel fibers to a magnetic field.
Claim 3
Dependent Claim
42 words
The method for reinforcing concrete according to claim 1 which comprises disposing steel fiber reinforcement in a cast mass of unset concrete and subjecting said mass to the magnetic field to move and orient the fibers in the ultimate direction of stress.
Claim 4
Dependent Claim
35 words
The method of claim 2, in which the fibers are distributed on the surface of the mass of unset concrete and the magnetic field moves the fibers into the mass in addition to said orientation.
Claim 5
Dependent Claim
18 words
The method of claim 1, in which the fibers are mixed into the concrete before it is cast.
Claim 6
Dependent Claim
27 words
The method of claim 2, in which the unset concrete mass is simultaneously vibrated to assist in the orientation and movement of said fibers within the mass.
Claim 7
Dependent Claim
30 words
The method of claim 2, in which the fibers are concentrated by the magnetic field in those areas of the cast mass that will be subjected to relatively greater stress.
References Cited (Backward Citations)
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US2849312A
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US3073732A
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US3128544A
Cited
US3312763A
Cited
US3429094A
Cited
US3806571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |