US3749352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for erection of pressed monolithic lining in underworkings
Assignee: Individual
•
Filing: 1971-01-13
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Granted: 1973-07-31
•
Expires: 1991-01-13
Abstract
Abstract A collapsible device for the erection of a pressed monolithic lining in underworkings wherein a pressing member, along its perimeter, is made of separate parts linked through hinge joints connected to drives acting in radial directions, and in which case the end portions of the parts adjoining the hinge-joints connected to the drives are adapted for rotation or function as toggle mechanisms. This makes it possible to develop an adequate pressure force in the radial directions.
Inventors
- 👤 V Khodosh
- 👤 A Mozhaev
- 👤 E Vasilenko
- 👤 S Salov
- 👤 V Ivanov
- 👤 I Melnikov
- 👤 F Rusanov
- 👤 B Pachulia
- 👤 I Fishman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:48
CPC Classifications
E; E21; E21D; E21D11/00; E21D11/04; E21D11/10; E21D11/102
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A collapsible device for the erection of pressed monolithic linings of underworkings comprising in combination: a pressing member, said pressing member being defined by separate parts along the perimeter thereof, hinge joints through which said parts of said pressing member are connected to each other, a first drive means connected to each hinge joint and acting in radial directions, at least two of said parts having end portions, each end portion including two links, one link being pivoted at one end to one of said two parts, the other link being pivoted at one end to the other of said two parts, and a pivotal connection between the other ends of said two links, and a further drive means connected to each pivotal connection and acting in radial directions to increase the separating force.
Claim 2
Dependent Claim
134 words
A collapsible device for the erection of pressed monolithic linings of underworkings comprising in combination: a pressing member, said pressing member being defined by separate parts along the perimeter thereof, hinge joints through which said parts of said pressing member are connected to each other, a first drive means connected to each hinge joint and acting in radial directions, at least two of said parts having end portions, each end portion including two links, one link being pivoted at one end to one of said two parts, the other link being pivoted at one end to the other of said two parts, and a pivotal connection between the other ends of said two links, and a further drive means connected to each pivotal connection and acting in radial directions to increase the separating force.
References Cited (Backward Citations)
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US1530283A
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US1734773A
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US1983117A
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US2114785A
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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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |