GB1422021A - Suction dredger - Google Patents
Suction dredgerInfo
- Publication number
- GB1422021A GB1422021A GB434173A GB434173A GB1422021A GB 1422021 A GB1422021 A GB 1422021A GB 434173 A GB434173 A GB 434173A GB 434173 A GB434173 A GB 434173A GB 1422021 A GB1422021 A GB 1422021A
- Authority
- GB
- United Kingdom
- Prior art keywords
- movement
- piston
- cylinder
- fluid
- winch drum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/06—Floating substructures as supports
- E02F9/067—Floating substructures as supports with arrangements for heave compensation
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
- Actuator (AREA)
Abstract
1422021 Taking up slack in flexible elements GOYO-BALLAST CO Ltd 29 Jan 1973 [28 Jan 1972] 4341/73 Heading B8B [Also in Divisions E1 and E2] A cable 8, which is used to suspend a flexible suction conduit 3 from a dredging vessel, passes over a pulley 21 mounted on a piston 20 which moves within a cylinder 17 in response to sealevel movements; a control mechanism being provided to sense movement of the piston outside predetermined limits and to reverse such movement by supplying fluid to or discharging fluid from the hydraulic circuit of the cylinder 17. Inductive sensors 27, 28 detect movement of a rod 31 on the piston and send signals representative of magnitude and direction of piston movement to control circuitry 43 (Fig. 2, not shown) which operates valve 40 or 41 to release fluid from or admit fluid to the cylinder. A cable winch drum 13 is controlled via devices 47, 48 by the circuitry 43 to prevent movement of the winch drum which would conflict with the corrective movement being induced in the piston. However if sea level movements exceed a second higher set of limits the circuitry causes reverse movement of the winch drum to supplement the corrective action of the piston.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7201218A NL152321B (en) | 1972-01-28 | 1972-01-28 | GROUND CLEANER. |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1422021A true GB1422021A (en) | 1976-01-21 |
Family
ID=19815247
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB434173A Expired GB1422021A (en) | 1972-01-28 | 1973-01-29 | Suction dredger |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE794563A (en) |
DE (1) | DE2303850C3 (en) |
FR (1) | FR2169380B1 (en) |
GB (1) | GB1422021A (en) |
NL (1) | NL152321B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL155613B (en) * | 1975-04-15 | 1978-01-16 | Ballast Nedam Groep Nv | CUTTING Suction Dredger FOR Dredging Soil. |
US4268013A (en) * | 1978-06-12 | 1981-05-19 | Nl Industries, Inc. | Crane motion compensator |
-
0
- BE BE794563D patent/BE794563A/en unknown
-
1972
- 1972-01-28 NL NL7201218A patent/NL152321B/en not_active IP Right Cessation
-
1973
- 1973-01-26 FR FR7302936A patent/FR2169380B1/fr not_active Expired
- 1973-01-26 DE DE19732303850 patent/DE2303850C3/en not_active Expired
- 1973-01-29 GB GB434173A patent/GB1422021A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL152321B (en) | 1977-02-15 |
FR2169380A1 (en) | 1973-09-07 |
NL7201218A (en) | 1973-07-31 |
DE2303850A1 (en) | 1973-08-09 |
DE2303850B2 (en) | 1978-05-11 |
FR2169380B1 (en) | 1978-03-10 |
DE2303850C3 (en) | 1979-01-04 |
BE794563A (en) | 1973-07-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |