Patent US3612609A successfully refreshed from Google Patents.
US3612609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the demolishing and removal of earthwork
Assignee: Schaeffler Schweiz GmbH
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Filing: 1969-07-03
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Granted: 1971-10-12
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Expires: 1989-07-03
Abstract
Abstract A soil excavator includes a framework supporting a tubular boom for universal motion, a shovel being rotatably and extensibly carried on the free end of a nest of telescoped tubes lodged in the boom. The framework may be anchored to a concrete shell introduced into the tunnel wall behind an advancing cutter shield.
Inventors
- 👤 Josef Reuls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:09
CPC Classifications
E; E02; E02F; E02F7/00; E02F7/02; E02F7/026; E02F3/00; E02F3/04; E02F3/28; E02F3/30; E02F3/303; E02F3/36; E02F3/38; E21; E21D; E21D9/00; E21D9/06; E21D9/08; E21D9/0875
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
120 words
An assembly for digging tunnels, comprising: a tubular shield provided with a cutting edge for horizontally advancing into the soil; a shell in the wake of said shield lining the wall of a tunnel dug by said cutting edge; a boom in said shell provided with a mobile extension terminating in the vicinity of said cutting edge, said extension carrying a shovel for picking up debris loosened from the soil by the advancing shield; a framework in said shell supporting said boom with universal mobility; and anchor means on said framework for immobilizing same with reference to said shell, said anchor means bearing upon the interior of said shell on at least three points peripherally spaced about the shell axis.
Claim 2
Dependent Claim
120 words
An assembly for digging tunnels, comprising: a tubular shield provided with a cutting edge for horizontally advancing into the soil; a shell in the wake of said shield lining the wall of a tunnel dug by said cutting edge; a boom in said shell provided with a mobile extension terminating in the vicinity of said cutting edge, said extension carrying a shovel for picking up debris loosened from the soil by the advancing shield; a framework in said shell supporting said boom with universal mobility; and anchor means on said framework for immobilizing same with reference to said shell, said anchor means bearing upon the interior of said shell on at least three points peripherally spaced about the shell axis.
Claim 3
Dependent Claim
20 words
An assembly as defined in claim 1, further comprising a chute connected with said framework and positioned below said shovel.
Claim 4
Dependent Claim
42 words
An assembly as defined in claim 1 wherein said framework comprises a roller-supported carriage, a set of columns rising from said carriage, and a set of pointed elements at the top of said columns engageable with the inner wall of said shell.
Claim 5
Dependent Claim
26 words
An assembly as defined in claim 3 wherein said columns form upright cylinders provided with fluid-operable pistons, said pointed elements being projecting extremities of said pistons.
Claim 6
Dependent Claim
26 words
An assembly as defined in claim 3 wherein said framework includes a yoke spanning said columns and a swivel mount for said boom on said yoke.
Claim 7
Dependent Claim
24 words
An assembly as defined in claim 5 wherein said boom is provided with a fork laterally articulated thereto and journaled in said swivel mount.
Claim 8
Dependent Claim
32 words
An assembly as defined in claim 5 wherein said yoke includes a transverse shaft provided with a pair of rollers bearing upon the upper part of the inner wall of said shell.
References Cited (Backward Citations)
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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) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |