| Patents for E02F 5 - Dredgers or soil-shifting machines for special purposes (6,683) |
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| 07/08/1992 | CN1062572A New technique for dredging of rivers |
| 07/02/1992 | DE4040366A1 Earth-moving machine loosening mechanism - has buckets and shutters in wheel extending to central shaft |
| 06/25/1992 | WO1992011417A1 Self-contained shim pack assembly |
| 06/25/1992 | CA2068206A1 Self-contained shim pack assembly |
| 06/16/1992 | US5121800 Soil loosening device |
| 06/11/1992 | DE4037921A1 Removal of rocky obstacles to mining and building - using electrically detonated explosives in temporary plastics mouldings fixed to charge carrier for directionally effective blasting |
| 06/09/1992 | US5120433 Pipeline padding apparatus |
| 06/09/1992 | US5119888 Replaceable edge for trenching plow blade |
| 06/02/1992 | US5118230 Method and apparatus for installation of leachate containment system |
| 05/19/1992 | US5113610 Rotating disk type ditcher |
| 05/19/1992 | US5113609 Propulsion apparatus |
| 05/19/1992 | CA1301093C Tortional limiting device for a vehicular ditching apparatus |
| 05/14/1992 | WO1992008011A1 Ballast distribution, regulation and reclaiming railroad maintenance device |
| 05/13/1992 | EP0456692A4 Cutting apparatus |
| 05/13/1992 | CN1016586B Insitu hazardous waste treating apparatus and method of using same |
| 05/12/1992 | US5112161 Method for excavating and constructing monolithic continuous straight or circular structural walls and a machine for realizing such a method |
| 05/12/1992 | US5111601 Excavation device with rotary cutter having a horizontal axis |
| 05/06/1992 | EP0455672A4 Trench excavating arm propulsion apparatus |
| 04/28/1992 | US5108229 Pipe installer and method for installation of pipe |
| 04/22/1992 | EP0480979A1 Multi-functional finishing and levelling machine for the construction of road and other embankments |
| 04/21/1992 | CA1298981C Method and apparatus for simultaneous trenching and pipelaying in an arctic environment |
| 04/16/1992 | WO1992006250A1 Improvements in or related to cleaning aggregate materials |
| 04/14/1992 | US5103918 Tillage unit |
| 04/08/1992 | EP0478749A1 Ripper assembly with pitch control and integral frame and push block. |
| 04/08/1992 | CN2101055U Portable energy-saving sludge cleaning machine |
| 04/07/1992 | US5102200 Impact ripper apparatus |
| 04/07/1992 | US5101583 Articulated toothed excavating drum for road side ditches of desired profile |
| 03/31/1992 | CA1298227C Materials transport and distribution apparatus |
| 03/26/1992 | DE4029021A1 Weed cutting and gathering vehicle - runs on tracks and is suitable for beach and shallow water operation |
| 03/25/1992 | EP0477106A1 Equipment for digging trenches, holes or the like, applicable to machines |
| 03/24/1992 | US5097610 Compact padding machine |
| 03/18/1992 | CN2099145U Self-energizing riverbed silt cleaning equipment |
| 03/18/1992 | CN1059576A Ditcher |
| 03/17/1992 | CA1297503C Trenching machine |
| 03/11/1992 | EP0473590A1 A caterpillar-driven excavating machine equipped with a separate working tool. |
| 03/10/1992 | US5094017 Direct driven type shock ripper device |
| 02/26/1992 | EP0472314A1 Method and tool for seabed excavation |
| 02/25/1992 | US5090141 Adjustable blade holder |
| 02/18/1992 | US5088857 Scavenging apparatus for embedding cables or the like into the soil of waters |
| 02/12/1992 | EP0470191A1 Method and apparatus for the active prevention of sedimentation in harbors and waterways |
| 02/05/1992 | EP0469674A1 Device for the removal of a surface layer from an underwater bed, such as layer of sludge |
| 02/04/1992 | US5084991 Pipeline padding apparatus and method |
| 01/30/1992 | DE4023762A1 Cable laying plough esp. for bed of stream - provides for attachment of alternative tracks, wheels or floats adapted to requirements of type of terrain |
| 01/28/1992 | CA2003536C Device for thawing ground |
| 01/23/1992 | DE4021549A1 Machine for cleaning and levelling verges - comprises motor-driven milling and delivery worm fitted on front of narrow track road vehicle |
| 01/22/1992 | EP0357652B1 Pneumatic extraction head |
| 01/22/1992 | CN1058064A Dual-wheel ditcher for u-shaped ditch |
| 01/15/1992 | EP0465667A1 Method of and apparatus for laying pipes |
| 01/15/1992 | CN2093198U Tractive self-propelling type hydraulic excavator |
| 01/02/1992 | EP0463158A1 Emplacement of foraminous piping in non-cohesive subsoils |
| 12/31/1991 | CA1293673C Control system for an impact ripper |
| 12/27/1991 | EP0462181A1 Impact bucket apparatus |
| 12/18/1991 | CN2090836U Dredger for riverbed silt |
| 12/17/1991 | US5072993 Self-contained shim pack assembly |
| 12/12/1991 | WO1991019076A1 Impact ripper apparatus |
| 12/12/1991 | WO1991018715A1 Impact ripper apparatus with linear reciprocating ram |
| 12/12/1991 | DE4026590A1 Schaufelrad mit einem tragkoerper Impeller with a tragkoerper |
| 12/12/1991 | CA2024263A1 Wear resistant offset sidebar chain |
| 12/10/1991 | WO1991019861A1 Bucket wheel with supporting body |
| 12/10/1991 | US5070632 Trenching machine with laterally adjustable chain-type digging implement |
| 12/10/1991 | CA2081919A1 Bucket wheel with supporting body |
| 12/05/1991 | CA2018274A1 Ditcher |
| 12/03/1991 | US5070286 Manipulator for public works machines and machine equipped with such manipulator for road works |
| 11/27/1991 | CN1014916B Control system for impact ripper |
| 11/26/1991 | US5067853 Oscillating plow apparatus |
| 11/21/1991 | EP0456692A1 Cutting apparatus. |
| 11/13/1991 | EP0455672A1 Trench excavating arm propulsion apparatus. |
| 11/05/1991 | US5062228 Compactor and blade attachment for loader |
| 10/24/1991 | WO1991016507A1 Ripper assembly with pitch control and integral frame and push block |
| 10/24/1991 | CA2053899A1 Ripper assembly with pitch control and integral frame and push block |
| 10/22/1991 | CA1290948C Railroad cable laying apparatus with plow blade support and dual plow tethering |
| 10/16/1991 | EP0452021A1 A method of and apparatus for trenching |
| 10/15/1991 | US5056244 Digging chain vibratory system |
| 10/15/1991 | CA1290772C Trenching device |
| 10/15/1991 | CA1290771C Apparatus for trencher |
| 10/15/1991 | CA1290770C Trailing flusher dredger with trans channel flow enhancement |
| 10/09/1991 | CN2086275U River course water power suspension silt-discharging device |
| 10/08/1991 | US5054958 Apparatus to prepare a road surface |
| 10/03/1991 | WO1991014836A1 Rotary rockwheel assemblies |
| 10/02/1991 | EP0449447A1 Trencher |
| 10/02/1991 | DE4017379C1 Cable plough towable for cable laying - allows distance between front wheels and share to be varied and fixed in selected position |
| 10/02/1991 | CN2085812U Semi-enclosed submerged suction dredge with self-twisting, self-sucking and self-advancing features |
| 10/01/1991 | US5052857 Placement of foraminous piping in non-cohesive subsoils |
| 09/25/1991 | EP0259472B1 Dredger |
| 09/24/1991 | US5050685 Split bentleg plow |
| 09/24/1991 | CA1289369C Method and device for drainage of borders of all stabilized civil engineering areas or of adjacent borders of a structure |
| 09/23/1991 | WO1991014834A1 Improvements in fluid-based excavating |
| 09/18/1991 | EP0446712A1 Excavation device with rotary cutter having a horizontal axis |
| 09/04/1991 | CN2084064U Miniature hinging and suction type dredger |
| 08/21/1991 | EP0442589A1 Method and device for digging stable trenches into the ground and/or unconsolidated soil |
| 08/20/1991 | US5040900 Sludge stabilizing method and apparatus |
| 08/13/1991 | US5039252 Cable feed assembly for use with a vibratory plow |
| 08/08/1991 | DE4002177A1 Machine for forming sloping shoulder on road - consists of endless chain with attached cutting tools and earth storage hopper |
| 07/31/1991 | EP0438683A1 Method and device for dumping fine material on the sea bed or slopes during dredging |
| 07/30/1991 | WO1991011563A1 Method of and apparatus for laying pipes |
| 07/30/1991 | US5035071 Trench wall cutter |
| 07/23/1991 | US5033452 Device for thawing ground |
| 07/23/1991 | US5033214 Trenching attachment mounting system |
| 07/23/1991 | CA1286581C Process and apparatus for installing a new pipe inside an existing pipe |
| 07/17/1991 | WO1991011564A1 Emplacement of foraminous piping in non-cohesive subsoils |