Patent US3827244A successfully refreshed from Google Patents.
US3827244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A form for producing a concrete lining of mine galleries, tunnels, shafts or the like
Assignee: Individual
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Filing: 1972-12-20
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Granted: 1974-08-06
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Expires: 1992-12-20
Abstract
Abstract A shuttering or form for producing a concrete lining in galleries, tunnels, shafts or the like, in which the concrete is introduced between an inner shuttering and the natural soil, the concrete lining being supported by the form until the concrete has reached its desired strength.
Inventors
- 👤 H Walbrohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:43
CPC Classifications
E; E21; E21D; E21D11/00; E21D11/04; E21D11/10; E21D11/102; E21D5/00; E21D5/12
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
225 words
A form for producing a concrete lining in mine galleries, tunnels or the like, that form being adapted to be pulled lengthwise and comprising, in combination, a rigid tubular forming member having an outer surface spaced from an inner surface of the mine gallery according to the thickness of the concrete lining to be produced and having a leading end at which concrete is introduced between said inner and said outer surface, and a trailing end, and a length sufficient so that the concrete introduced at the leading end has set sufficiently to form stability as it reaches said trailing end; a tubular flexible compression resistant thrust member fluid-tightly and tractionresistantly connected at one end to said trailing end of Said forming member, said flexible thrust member having an outer surface radially inwardly spaced from the inner surface of the concrete lining so as to form an annular space with said inner surface; a seal at the other end of said thrust member for closing said annular space at said other end of said thrust member; and means communicating with said annular space for filling the latter with a pressurized fluid, the overall length of said form being such that the concrete introduced at the leading end of said forming member will have reached a desired strength at the other end of said thrust member.
Claim 2
Dependent Claim
225 words
A form for producing a concrete lining in mine galleries, tunnels or the like, that form being adapted to be pulled lengthwise and comprising, in combination, a rigid tubular forming member having an outer surface spaced from an inner surface of the mine gallery according to the thickness of the concrete lining to be produced and having a leading end at which concrete is introduced between said inner and said outer surface, and a trailing end, and a length sufficient so that the concrete introduced at the leading end has set sufficiently to form stability as it reaches said trailing end; a tubular flexible compression resistant thrust member fluid-tightly and tractionresistantly connected at one end to said trailing end of Said forming member, said flexible thrust member having an outer surface radially inwardly spaced from the inner surface of the concrete lining so as to form an annular space with said inner surface; a seal at the other end of said thrust member for closing said annular space at said other end of said thrust member; and means communicating with said annular space for filling the latter with a pressurized fluid, the overall length of said form being such that the concrete introduced at the leading end of said forming member will have reached a desired strength at the other end of said thrust member.
Claim 3
Dependent Claim
30 words
A form as defined in claim 1, wherein said tubular thrust member comprises a plurality of rigid elongated members arranged closely adjacent each other and articulatedly connected to each other.
Claim 4
Dependent Claim
58 words
A form as defined in claim 1, wherein said tubular thrust member comprises an elastic outer skin, a plurality of longitudinally extending stiffening members secured circumferentially spaced from each other to the inner surface of said outer skin, and a plurality of longitudinally spaced rigid frames extending transversely through said tubular thrust member and supporting said stiffening members.
Claim 5
Dependent Claim
15 words
A form as defined in claim 3, wherein said outer skin is made from rubber.
Claim 6
Dependent Claim
15 words
A form as defined in claim 3, and including reinforcing means reinforcing said outer skin.
Claim 7
Dependent Claim
34 words
A form as defined in claim 3, and including a plurality of longitudinally spaced spacing members connected to the outer surfaces of said skin for centrally guiding said thrust member in said concrete lining.
Claim 8
Dependent Claim
18 words
A form as defined in claim 6, wherein said spacing members comprise a plurality of inflatable annular hoses.
Claim 9
Dependent Claim
15 words
A form as defined in claim 1, wherein said seal comprises an inflatable annular hose.
Claim 10
Dependent Claim
32 words
A form as defined in claim 3, wherein said stiffening members are arranged in longitudinally spaced groups and including an inflatable hose sandwiched between said groups and connected to said outer skin.
Claim 11
Dependent Claim
24 words
A form as defined in claim 1, wherein said forming member is of frustoconical shape having a larger cross-sectional area at its leading end.
Claim 12
Dependent Claim
38 words
A form as defined in claim 10, wherein said forming member has at least one wedge-shaped wall portion which widens toward said leading end, and means for moving said wall portion in longitudinal direction of said forming member.
Claim 13
Dependent Claim
21 words
A form as defined in claim 11, wherein said moving means comprises a hydraulic ram connected to said wedge-shaped wall portion.
Claim 14
Dependent Claim
32 words
A form as defined in claim 1, wherein said means for filling said annular space with a pressurized fluid comprises pump means constructed for maintaining a constant pressure in said annular space.
Claim 15
Dependent Claim
29 words
A form as defined in claim 1, and including a pressure relief valve communicating with said annular space in the region of said other end of said thrust member.
Claim 16
Dependent Claim
23 words
A form as defined in claim 1, and including at least one inflatable annular hose surrounding the leading end of said forming member.
Claim 17
Dependent Claim
31 words
A form as defined in claim 1, and including an I-shaped endless profile and two annular inflatable hoses concentrically supported by said profile about the leading end of said forming member.
Claim 18
Dependent Claim
21 words
A form as defined in claim 16, and including lockable means for pivotally supporting said profile and said hoses supported thereon.
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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |