US4192690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber-reinforced hydraulically hardenable shaped objects
Assignee: Heidelberg Materials AG
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Filing: 1977-04-25
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Granted: 1980-03-11
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Expires: 1997-04-25
Abstract
Abstract The invention relates to a process for the preparation of fiber-reinforced cement-based hydraulically hardenable shaped objects, which comprises spraying matrix and fibers with a spraying apparatus onto a deflecting surface to produce a mixture of matrix and fibers, removing the mixture in the unhardened state from the deflecting surface into a mould, and preparing from the mixture fiber-reinforced cement-based hydraulically hardenable shaped objects. The invention further relates to an apparatus for the preparation of the above described shaped objects.
Inventors
- 👤 Adolf Meyer
- 👤 Peter O. Gutfleisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:15
CPC Classifications
B; B28; B28C; B28C5/00; B28C5/40; B28C5/402; Y; Y10; Y10S; Y10S264/00; Y10S264/72
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
66 words
Process for the preparation of fiber-reinforced cement-based hydraulically hardenable shaped objects, which comprises spraying cement-based matrix and fibers with a spraying apparatus onto a deflecting surface to produce on said surface a mixture of matrix and fibers, removing the mixture in the unhardened state from said deflecting surface into a mould, and moulding from the mixture fiber-reinforced cement-based hydraulically hardenable shaped objects by hardening under water.
Claim 2
Dependent Claim
66 words
Process for the preparation of fiber-reinforced cement-based hydraulically hardenable shaped objects, which comprises spraying cement-based matrix and fibers with a spraying apparatus onto a deflecting surface to produce on said surface a mixture of matrix and fibers, removing the mixture in the unhardened state from said deflecting surface into a mould, and moulding from the mixture fiber-reinforced cement-based hydraulically hardenable shaped objects by hardening under water.
Claim 3
Dependent Claim
24 words
The process claimed in claim 1, in which the deflecting surface is selected from the group comprising a plate, a wall and a board.
Claim 4
Dependent Claim
18 words
The process claimed in claim 1, in which the deflecting surface is in the shape of a funnel.
Claim 5
Dependent Claim
24 words
The process claimed in claim 1, in which the vertical axis of the deflecting surface forms an acute angle with the line of spray.
Claim 6
Dependent Claim
24 words
The process claimed in claim 1, in which the vertical axis of the deflecting surface forms an obtuse angle with the line of spray.
Claim 7
Dependent Claim
22 words
The process claimed in claim 1, in which the matrix and the fibers are sprayed onto the deflecting surface with compressed air.
Claim 8
Dependent Claim
16 words
The process claimed in claim 1, in which the matrix comprises in addition a liquefying agent.
Claim 9
Dependent Claim
15 words
The process claimed in claim 1, in which the matrix comprises in addition melamin resin.
Claim 10
Dependent Claim
15 words
The process claimed in claim 1, in which the matrix comprises in addition polyethylene oxide.
Claim 11
Dependent Claim
14 words
The process claimed in claim 1, in which the matrix comprises in addition methylcellulose.
Claim 12
Dependent Claim
21 words
The process claimed in claim 1, in which the matrix and the fibers are sprayed without the aid of compressed air.
Claim 13
Dependent Claim
15 words
The process claimed in claim 1, in which the deflecting surface is swingeable or rotatable.
Claim 14
Dependent Claim
13 words
Fiber-reinforced cement-based hydraulically hardenable shaped objects prepared by the process of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-11 | 1983-09-10 | 1984-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-11 | 1987-09-10 | 1988-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-11 | 1991-09-10 | 1992-03-11 | $7700.00 | Window Closed / Lapsed |