US3828451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ducting system for suction dredgers having pivotally connected tube lengths
Assignee: Ballast Nedam NV
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Filing: 1973-01-29
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Granted: 1974-08-13
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Expires: 1993-01-29
Abstract
Abstract An earth dredger comprising a duct system for sucking up earth from a soil below water, the duct system comprising a plurality of rigid lengths of tube pivotally connected with each other by means of universal joints formed by hinge parts and coupling members and communicating with each other through flexible, elastic bellows is improved in that the coupling members of the universal joints are arranged between two adjacent bellows, so that the universal joint has smaller dimensions and the earth dredger is less expensive.
Inventors
- 👤 Koning J De
- 👤 Der Veen R Van
- 👤 T Wolters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:55
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/90; E02F3/905; F; F16; F16L; F16L27/00; F16L27/02; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/8807
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
125 words
An earth dredger comprising a duct system for sucking up earth from a soil below water, said duct system comprising a plurality of rigid lengths of tube pivotally connected with each other by means of universal joints formed by hinge parts and coupling members, at least a pair of said lengths of tube having branched end portions facing each other with the corresponding legs of such branched end portions communicating with each other through flexible, elastic bellows and being arranged side by side at the area of that universal joint pivotally connecting such pair, the hinge parts and the coupling members of the universal joint pivotally connecting said pair of lengths of tube being arranged between the two adjacent bellows communicating said branched end portions.
Claim 2
Dependent Claim
125 words
An earth dredger comprising a duct system for sucking up earth from a soil below water, said duct system comprising a plurality of rigid lengths of tube pivotally connected with each other by means of universal joints formed by hinge parts and coupling members, at least a pair of said lengths of tube having branched end portions facing each other with the corresponding legs of such branched end portions communicating with each other through flexible, elastic bellows and being arranged side by side at the area of that universal joint pivotally connecting such pair, the hinge parts and the coupling members of the universal joint pivotally connecting said pair of lengths of tube being arranged between the two adjacent bellows communicating said branched end portions.
Claim 3
Dependent Claim
26 words
An earth dredger as claimed in claim 1, wherein the hinge parts and the coupling members have two pivotal axes intersecting each other at right angles.
Claim 4
Dependent Claim
26 words
An earth dredger as claimed in claim 1 wherein the hinge parts and the coupling members have two pivotal axes crossing each other at right angles.
Claim 5
Dependent Claim
39 words
An earth dredger as claimed in claim 1 wherein at least one of the hinge parts is journalled so as to be rotatable about a longitudinal axis of the duct system with respect to at least one rigid tubing.
Claim 6
Dependent Claim
16 words
An earth dredger as claimed in claim 4 wherein the universal joint is a ball-and-socket joint.
Claim 7
Dependent Claim
16 words
An earth dredger as claimed in claim 1 wherein the universal joint is a ball-and-socket joint.
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |