US3882684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-compartment cartridge adapted for use in strengthening coal or stone walls
Assignee: Bergwerksverband GmbH
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Filing: 1974-09-09
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Granted: 1975-05-13
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Expires: 1994-09-09
Abstract
Abstract A two-compartment pierceable cartridge adapted for reinforcing or strengthening a stone or coal wall by insertion into a hole that had been bored into the wall, one compartment of which contains a polyisocyanate of diphenylmethane, and the other compartment of which contains a mixture of a polyetherglycol having a hydroxyl number between 200 and 400, between 10 and 20 percent by weight of a plasticizer, and between 0.3 and 5.0 percent by weight of water. When the cartridge is broken up and its contents are mixed, a foamed polyurethane resin is formed in situ which plugs the bored hole and thereby reinforces the wall.
Inventors
- 👤 Frank Meyer
- 👤 Alfons Jankowski
- 👤 Otto-Ernst Glaesmann
- 👤 Gerhard Haake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:45
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; E; E02; E02D; E02D3/00; E02D3/12; E21; E21D; E21D9/00; E21D9/001; E21D9/002; F; F16; F16B; F16B13/00; F16B13/14; F16B13/141; F16B13/143
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
A TWO-COMPARTMENT PIERCEABLE CARTRIDGE ADAPTED FOR REINFORCING A STONE OR COAL WALL BY INSERTION INTO A HOLE THAT HAD BEEN BORED INTO THE WALL, ONE COMPRATMENT OF WHICH CONTAINS A POLYISOCYANATE OF DIPHENYLMETHANE AND THE OTHER COMPARTMENT OF WHICH CONTAINS A MIXTURE OF A POLYETHERGLYCOL HAVING A HYDROXYL NUMBER BETWEEN 200 AND 400, BETWEEN 10 AND 20 PERCENT BY WEIGHT OF A PLASTICIZER, AND BETWEEN 0.3 AND 5.0 PERCENT BY WEIGHT OF WATER.
Claim 2
Dependent Claim
73 words
A TWO-COMPARTMENT PIERCEABLE CARTRIDGE ADAPTED FOR REINFORCING A STONE OR COAL WALL BY INSERTION INTO A HOLE THAT HAD BEEN BORED INTO THE WALL, ONE COMPRATMENT OF WHICH CONTAINS A POLYISOCYANATE OF DIPHENYLMETHANE AND THE OTHER COMPARTMENT OF WHICH CONTAINS A MIXTURE OF A POLYETHERGLYCOL HAVING A HYDROXYL NUMBER BETWEEN 200 AND 400, BETWEEN 10 AND 20 PERCENT BY WEIGHT OF A PLASTICIZER, AND BETWEEN 0.3 AND 5.0 PERCENT BY WEIGHT OF WATER.
Claim 3
Dependent Claim
16 words
A two-compartment cartridge as defined in claim 1 in which the polyisocyanate of diphenylmethane is 4,4''-bis(carbonylamino)diphenylmethane.
Claim 4
Dependent Claim
31 words
A two-compartment cartridge as defined in claim 1 in which one compartment contains a mixture of 4,4''-bis(carbonylamino)diphenylmethane and at most 30 percent by weight of another polyisocyanate of an aromatic hydrocarbon.
Claim 5
Dependent Claim
33 words
A two-compartment cartridge as defined in claim 1 in which at least the wall separating the two compartments from each other is formed of a film that is essentially impervious to water vapor.
Claim 6
Dependent Claim
40 words
A two-compartment cartridge as defined in claim 1 in which the wall separating the two compartments from each other is formed of a composite film consisting of a layer of a polyethylene resin and a layer of a polyamide resin.
Claim 7
Dependent Claim
26 words
A two-compartment cartridge as defined in claim 1 in which the wall separating the two compartments from each other is formed of a poly(vinylidine chloride) resin.
Claim 8
Dependent Claim
46 words
A two-compartment cartridge as defined in claim 1 in which the polyetherglycol is the product of the reaction between trimethylolpropan and propyleneoxid, this product having an oH-number of 320 - 370, an average molecular weight of about 150 and a viscosity of about 700 mPa s/25*C.
Claim 9
Dependent Claim
52 words
A two-compartment cartridge as defined in claim 1 in which the polyetherglycol is the product of the reaction between sacharose and 1,2 propandiol, using a mol-proportion of 1:5, and propyleneoxid, this product having an oH-number of 340-400, an average molecular weight of about 440 and a viscosity of about 580 mPa s/25*C.
Claim 10
Dependent Claim
15 words
A two-compartment cartridge as defined in claim 1 in which the plasticizer is castor oil.
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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |