US4008576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of securing objects in passages and arrangement obtained thereby, particularly hose lines sealingly secured in the passages of coal mines for dust suppression
Assignee: Bergwerksverband GmbH
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Filing: 1974-09-09
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Granted: 1977-02-22
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Expires: 1994-09-09
Abstract
Abstract An object extends into a passage and defines a clearance space with the inner wall of the passage. A hardenable, foamable synthetic resin in flowable state is admitted into the clearance space. Upon hardening and foaming of the synthetic resin, the object is sealingly secured in the passage by the synthetic resin. In a preferred application, the passage is one provided in a coal mine and the object is a hose line for the purpose of suppressing dust. The synthetic resin is advantageously polyurethane including a polyhydroxyl component which contains a polyetherglycol having a hydroxyl number of 300 to 350 and a polyetherglycol having a hydroxyl number of 450 to 500. The polyetherglycol components respectively constitute 80 to 90 parts and 10 to 20 parts of the polyhydroxyl component. The polyhydroxyl component preferably includes a filler in an amount such that the weight of the latter at least equals that of the polyhydroxyl component.
Inventors
- 👤 Frank Meyer
- 👤 Helmut Becker
- 👤 Heinz Goretz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:00
CPC Classifications
E; E21; E21F; E21F5/00; E21F5/18
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
119 words
A method of securing liquid-conveying elements for dust suppression in mines, comprising forming an underground passage which opens to a source of dust in a mine; positioning a liquid- conveying element in such a manner that said element extends along said passage and is arranged to permit impingement of said dust source by a stream of liquid to thereby wet said dust source and suppress the escape of dust therefrom, said element defining a clearance space with the inner wall of said passage; admitting into said space a hardenable synthetic resin which is in flowable state; hardening said resin in said space to thereby secure said element in said passage; and connecting said element with a source of liquid.
Claim 2
Independent Claim
119 words
A method of securing liquid-conveying elements for dust suppression in mines, comprising forming an underground passage which opens to a source of dust in a mine; positioning a liquid- conveying element in such a manner that said element extends along said passage and is arranged to permit impingement of said dust source by a stream of liquid to thereby wet said dust source and suppress the escape of dust therefrom, said element defining a clearance space with the inner wall of said passage; admitting into said space a hardenable synthetic resin which is in flowable state; hardening said resin in said space to thereby secure said element in said passage; and connecting said element with a source of liquid.
Claim 3
Dependent Claim
14 words
A method as defined in claim 1, wherein said mine is a coal mine.
Claim 4
Dependent Claim
18 words
A method as defined in claim 1, wherein said synthetic resin sealingly secures said element in said passage.
Claim 5
Dependent Claim
20 words
A method as defined in claim 1, wherein said synthetic resin substantially fills said space subsequent to said hardening thereof.
Claim 6
Dependent Claim
36 words
A method as defined in claim 1, wherein the volume of said synthetic resin subsequent to said hardening and foaming is at most about four times the volume of said synthetic resin in said flowable state.
Claim 7
Dependent Claim
36 words
A method as defined in claim 5, wherein the volume of said synthetic resin subsequent to said hardening and foaming is approximately three to four times the volume of said synthetic resin in said flowable state.
Claim 8
Dependent Claim
13 words
A method as defined in claim 1, wherein said synthetic resin comprises polyurethane.
Claim 9
Dependent Claim
29 words
A method as defined in claim 5, said polyurethane including a polyhydroxyl component; and wherein said component comprises a substance having a hydroxyl number between substantially 300 and 350.
Claim 10
Dependent Claim
19 words
A method as defined in claim 6, wherein said component comprises approximately 80 to 90 parts of said substance.
Claim 11
Dependent Claim
13 words
A method as defined in claim 8, wherein said substance is a polyetherglycol.
Claim 12
Dependent Claim
29 words
A method as defined in claim 7, said polyurethane including a polyhydroxyl component; and wherein said component comprises a substance having a hydroxyl number between approximately 450 and 500.
Claim 13
Dependent Claim
19 words
A method as defined in claim 4, wherein said component comprises approximately 10 to 20 parts of said substance.
Claim 14
Dependent Claim
13 words
A method as defined in claim 11, wherein said substance is a polyetherglycol.
Claim 15
Dependent Claim
56 words
A method as defined in claim 7, wherein said polyurethane is foamable and comprises a polyhydroxyl component containing about 80 to 90 parts of a polyetherglycol having a hydroxyl number between about 300 and 350, said component also including about 10 to 20 parts of a polyetherglycol having a hydroxyl number between about 450 and 500.
Claim 16
Dependent Claim
20 words
A method as defined in claim 7, said polyurethane including a polyhydroxyl component; and wherein said component comprises a filler.
Claim 17
Dependent Claim
21 words
A method as defined in claim 15, wherein the weight of said filler at least equals the weight of said component.
Claim 18
Dependent Claim
23 words
A method as defined in claim 1, wherein said synthetic resin is foamable and foams subsequent to the admission thereof into said space.
Claim 19
Dependent Claim
103 words
An arrangement for the suppression of dust in mines, comprising a mine having a source of dust; an underground passage communicating with said dust source; a liquid-conveying element at least partially extending into said passage and defining a clearance space with the inner wall of said passage, said element being connected with a source of liquid and being arranged so as to permit impingement of said dust source by a stream of liquid to thereby wet said dust source and suppress the escape of dust therefrom; and a hardened synthetic resin accommodated in said clearance space and securing said element in said passage.
Claim 20
Dependent Claim
103 words
An arrangement for the suppression of dust in mines, comprising a mine having a source of dust; an underground passage communicating with said dust source; a liquid-conveying element at least partially extending into said passage and defining a clearance space with the inner wall of said passage, said element being connected with a source of liquid and being arranged so as to permit impingement of said dust source by a stream of liquid to thereby wet said dust source and suppress the escape of dust therefrom; and a hardened synthetic resin accommodated in said clearance space and securing said element in said passage.
Claim 21
Dependent Claim
18 words
An arrangement as defined in claim 18, wherein said synthetic resin sealingly secures said element in said passage.
Claim 22
Dependent Claim
13 words
An arrangement as defined in claim 18, wherein said synthetic resin comprises polyurethane.
Claim 23
Dependent Claim
56 words
An arrangement as defined in claim 20, wherein said polyurethane is foamed and comprises a polyhydroxyl component containing about 80 to 90 parts of a polyetherglycol having a hydroxyl number between about 300 and 350, said component also including about 10 to 20 parts of a polyetherglycol having a hydroxyl number between about 450 and 500.
Claim 24
Dependent Claim
38 words
An arrangement as defined in claim 20, said polyurethane including a polyhydroxyl component; and wherein said component comprises a filler in an amount such that the weight of said filler at least equals the weight of said component.
Claim 25
Dependent Claim
14 words
An arrangement as difined in claim 18, wherein said mine is a coal mine.
Claim 26
Dependent Claim
45 words
An arrangement as defined in claim 22, said synthetic resin being foamed; and wherein said synthetic resin comprises a polyurethane, said polyurethane comprising a polyhydroxyl component which includes approximately 80 to 90 parts of a polyetherglycol having a hydroxyl number between about 300 and 350.
Claim 27
Dependent Claim
45 words
An arrangement as defined in claim 23, said synthetic resin being foamed; and wherein said synthetic resin comprises a polyurethane, said polyurethane comprising a polyhydroxyl component which includes approximately 10 to 20 parts of a polyetherglycol having a hydroxyl number between about 450 and 500.
Claim 28
Dependent Claim
13 words
An arrangement as defined in claim 18, wherein said synthetic resin is foamed.
References Cited (Backward Citations)
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Cited
US3224796A
Cited
US3391101A
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US3325195A
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US3430449A
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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) | 1980-02-22 | 1980-08-23 | 1981-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-22 | 1984-08-23 | 1985-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-22 | 1988-08-23 | 1989-02-22 | $7700.00 | Window Closed / Lapsed |