US3075359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the erection of tunnel linings
Assignee: Charles Brand & Son Ltd
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Filing: 1958-07-07
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Granted: 1963-01-29
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Expires: 1978-07-07
Abstract
No abstract record available.
Inventors
- 👤 Clark James Alexander Muirhead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:34
CPC Classifications
E; E21; E21D; E21D11/00; E21D11/04; E21D11/06; E21D11/07; E21D11/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
APPARATUS FOR LIFTING A PLURALITY OF BLOCKS TO FORM ELEVATED PORTIONS OF A TUNNEL LINING, COMPRISING A TUBULAR TUNNEL SHIELD CONFORMING IN SHAPE TO A TUNNEL TO BE CONSTRUCTED, SUPPORT MEANS SECURED TO SAID SHIELD AND HAVING PORTIONS AT EACH OF OPPOSITE SIDES OF THE SHIELD, A PAIR OF BLOCK SUPPORTING ARMS EACH OF THE SAME GENERAL SHAPE AS AN UPPER SEGMENT OF THE SHIELD, EACH ARM BEING MOVABLY SUPPORTED IN A HORIZONTAL BLOCK LOADING POSITION TRANSVERSELY OF SAID SHIELD, PIVOT MEANS ROTATABLY SUPPORTING SAID ARMS ON SAID OPPOSITE SUPPORT PORTIONS TO MOVE EACH ARM ABOUT AN AXIS PARALLEL TO THE AXIS OF SAID SHIELD FROM SAID LOADING POSITION TO A RAISED POSITION ADJACENT AN UPPER SEGMENT OF THE SHIELD PERIPHERY, AND JACK MEANS CONNECTING SAID ARMS TO THE SUPPORT MEANS FOR MOVING SAID ARMS FROM SAID LOADING TO SAID RAISED POSITIONS, SAID JACK MEANS BEING PIVOTALLY CONNECTED TO EACH ARM WHEN IN ITS LOADING POSITION AT A POINT SPACED INWARDLY TOWARD THE AXIS OF THE SHELL WITH RESPECT TO SAID PIVOT MEANS.
Claim 2
Dependent Claim
173 words
APPARATUS FOR LIFTING A PLURALITY OF BLOCKS TO FORM ELEVATED PORTIONS OF A TUNNEL LINING, COMPRISING A TUBULAR TUNNEL SHIELD CONFORMING IN SHAPE TO A TUNNEL TO BE CONSTRUCTED, SUPPORT MEANS SECURED TO SAID SHIELD AND HAVING PORTIONS AT EACH OF OPPOSITE SIDES OF THE SHIELD, A PAIR OF BLOCK SUPPORTING ARMS EACH OF THE SAME GENERAL SHAPE AS AN UPPER SEGMENT OF THE SHIELD, EACH ARM BEING MOVABLY SUPPORTED IN A HORIZONTAL BLOCK LOADING POSITION TRANSVERSELY OF SAID SHIELD, PIVOT MEANS ROTATABLY SUPPORTING SAID ARMS ON SAID OPPOSITE SUPPORT PORTIONS TO MOVE EACH ARM ABOUT AN AXIS PARALLEL TO THE AXIS OF SAID SHIELD FROM SAID LOADING POSITION TO A RAISED POSITION ADJACENT AN UPPER SEGMENT OF THE SHIELD PERIPHERY, AND JACK MEANS CONNECTING SAID ARMS TO THE SUPPORT MEANS FOR MOVING SAID ARMS FROM SAID LOADING TO SAID RAISED POSITIONS, SAID JACK MEANS BEING PIVOTALLY CONNECTED TO EACH ARM WHEN IN ITS LOADING POSITION AT A POINT SPACED INWARDLY TOWARD THE AXIS OF THE SHELL WITH RESPECT TO SAID PIVOT MEANS.
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) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |