| Patents for E02F 5 - Dredgers or soil-shifting machines for special purposes (6,683) |
|---|
| 07/17/1991 | CA2050924A1 Emplacement of foraminous piping in non-cohesive subsoils |
| 07/11/1991 | WO1991010017A1 Method of automatic control over impact ripper |
| 07/03/1991 | CN2080076U Dredging boat for pond |
| 07/02/1991 | US5027534 Power ditch router |
| 07/02/1991 | CA1285419C Mobile self propelled crushing machine |
| 06/19/1991 | CN2079201U Chain-knife type dredging control machine |
| 06/05/1991 | CN2078344U Rear-placed disc trench digging and refilling equipment |
| 05/28/1991 | US5018792 Impact ripper apparatus with linear reciprocating ram |
| 05/21/1991 | US5016717 Vacuum excavator |
| 05/15/1991 | EP0427013A1 Floating dredger |
| 05/14/1991 | US5015847 Device for measuring the radioactivity of a load of ore on an extraction machine such as a mechanical shovel or digger |
| 05/07/1991 | CA1283785C Ballasting method and device for a continuously laid and buried pipe in a trench with temporarily shored sidewalls |
| 05/03/1991 | WO1991006744A1 Linear impact ripper apparatus |
| 05/03/1991 | CA2072648A1 Linear inpact ripper apparatus |
| 05/01/1991 | CN2076130U Submerged dredge pump |
| 05/01/1991 | CN2076129U Ploughing and sucking submerged dredger |
| 04/23/1991 | US5009548 Apparatus for and a method of facilitating the excavating and refilling of a trench |
| 04/18/1991 | WO1991005141A1 Tunnel drilling apparatus and method to remove drill waste |
| 04/18/1991 | CA2066051A1 Tunnel drilling apparatus and method to remove drill waste |
| 04/17/1991 | EP0201503B1 Casting of structural walls |
| 04/09/1991 | US5006016 Corotating preventor of excavated soils in a ground improvement apparatus |
| 04/03/1991 | EP0419484A1 Improvements relating to dredgers. |
| 04/03/1991 | CN2074323U Hydraulic drive axial flow sludge cleaning machine |
| 04/03/1991 | CN1012271B Amphibious blower for feeding mud or earth |
| 04/02/1991 | US5003712 Apparatus for cleaning irrigation ditch |
| 03/28/1991 | WO1991005140A1 Drilling apparatus and method for its control |
| 03/28/1991 | WO1991005138A1 Control method and control equipment for drilling apparatus |
| 03/28/1991 | CA2066217A1 Control method and control equipment for drilling apparatus |
| 03/28/1991 | CA2066168A1 Drilling apparatus and method for its control |
| 03/27/1991 | CN2073902U Hydraulic grilled dirt-removing machine |
| 03/27/1991 | CN2073901U Multifunctional sludge cleaner for river and pond |
| 03/21/1991 | WO1991003607A1 Multi-tier plough |
| 03/21/1991 | DE3930590A1 Enclosed conveyor belt for earth or loose material - has horizontal belt and two fixed vertical side walls of low frictional resistance |
| 03/20/1991 | EP0417135A1 Trench filling unit |
| 03/19/1991 | US4999893 Method of making a bentleg plow |
| 03/19/1991 | CA1281613C Control system for a multiple shank impact ripper |
| 02/26/1991 | US4995175 For underwater debris |
| 02/21/1991 | WO1991002126A1 Multi-purpose device fitted at the front of machines for building road backfill and the like and comprising a blade for pushing the materials |
| 02/21/1991 | DE3926976A1 Machine for cutting concrete - has frame with drive motor for frame cutting head |
| 02/15/1991 | CA2008942A1 Trenching attachment mounting system |
| 02/13/1991 | CN2071213U Sand suction tube |
| 02/12/1991 | US4992000 Underwater trenching system |
| 02/12/1991 | US4991659 Ripper assembly with pitch control and integral frame and push block |
| 02/12/1991 | US4991322 Device for affixing cutter drums to an apparatus intended for cutting trenches in the ground |
| 02/12/1991 | CA1280130C Trenching system with trench wall enhancer, local longitudinal tractor, and concrete pouring facility |
| 02/06/1991 | EP0411278A1 Method and apparatus for destroying an underground pipe |
| 02/05/1991 | US4989824 Motor block fastening device for a trenching machine |
| 01/31/1991 | DE3943515A1 Excavator optional accessory with release mechanism |
| 01/30/1991 | EP0409873A1 Conveyor apparatus |
| 01/30/1991 | CN2070322U Pneumatic lifting digging ship |
| 01/29/1991 | US4987689 Trenching attachment mounting method |
| 01/24/1991 | DE3923113A1 Arrangement for cleaning sea beds contaminated by pumpable material - has underwater vehicle with stirring system and pump in underside hopper |
| 01/22/1991 | US4986697 Marine pipeline trenching plow for simultaneous pipe laying and entrenchment |
| 01/22/1991 | US4986010 Sloper apparatus |
| 01/16/1991 | EP0407934A2 Method for executing monolithic continuous straights or circular structural walls and a machine for realizing such a method |
| 01/16/1991 | CN1048583A Dredger capable of generating electricity |
| 01/15/1991 | US4984850 Linear impact ripper apparatus |
| 01/15/1991 | CA1278925C Method and device for temporary shoring of trench walls |
| 01/09/1991 | CN2068980U Trench-digging machine |
| 01/02/1991 | EP0405950A2 Digging machine |
| 01/01/1991 | US4981548 Apparatus for use in removing tile from a floor |
| 01/01/1991 | US4981396 Multiple pipe installation backfilling, and compaction attachment |
| 12/28/1990 | WO1991000392A1 Multi-functional finishing and levelling machine for the construction of road and other embankments |
| 12/28/1990 | CA2062832A1 Road embakment grader-finisher |
| 12/27/1990 | CA1278318C Road planer with full width cutting/excavating tool |
| 12/25/1990 | US4979781 Bench mining method and apparatus |
| 12/20/1990 | DE3919824A1 Mobile rotary boring and borehole lining arrangement - for installing concrete piles, is adapted from excavator or crane and safely distributes torque reaction forces |
| 12/20/1990 | DE3919469A1 Excavator optional accessory with release mechanism |
| 12/19/1990 | EP0402619A2 Continual digging-transport-loading accessory for earth moving equipment |
| 12/12/1990 | EP0264392B1 Apparatus for laying subterranean plastic tape and pipe |
| 12/12/1990 | CN2067294U Wring -suction type silt removing dredge |
| 12/11/1990 | US4976051 Rotary trench excavator |
| 12/11/1990 | CA1277587C High pressure fluid jet apparatus for cutting and removing pavement |
| 12/05/1990 | CN1010702B Trenching apparatus |
| 12/04/1990 | US4974348 Chain digger attachment |
| 11/28/1990 | EP0399090A2 Float for hydraulic engineering works |
| 11/28/1990 | CN2066459U Mud sucking disk for fish pool dredger |
| 11/27/1990 | CA1276912C Method and apparatus for padding pipe |
| 11/22/1990 | EP0397822A1 Cutter |
| 11/22/1990 | DE3914736A1 Pipe laying machine for concrete or stone pipes - consists of milling unit, with basket with back outlet and underneath cutter, with retainer |
| 11/22/1990 | CA2016043A1 Bucket wheel assembly |
| 11/21/1990 | CN2066038U Multi-functional excavator |
| 11/21/1990 | CN1010489B Under reaming pile bore excavating bucket and method of its excavation |
| 11/20/1990 | US4971157 Apparatus for the removal of spoil when making trenches of great depth |
| 11/20/1990 | US4970800 Method and apparatus for grading and measuring a surface having a curved profile |
| 11/14/1990 | CN2065629U Digging machine |
| 11/14/1990 | CN2065628U Combined digging machine |
| 11/06/1990 | CA1275813C Large diameter burried pipe |
| 11/01/1990 | WO1990012928A1 Method and apparatus for the active prevention of sedimentation in harbors and waterways |
| 10/30/1990 | US4966418 Front-loading cutting device for cutting up damaged road surfaces |
| 10/17/1990 | CN2063956U Universal miniature hydraulic excavator |
| 10/11/1990 | DE3911624A1 Tool for digging and undercutting slit trench - has cutting tool mounted on links pivoted to lower end of fixed frame |
| 10/03/1990 | EP0389643A1 Direct-acting impact ripper |
| 10/02/1990 | US4959915 Impact bucket apparatus |
| 09/26/1990 | EP0388568A2 Arrangement for measuring the radioactivity of mineral load on an extraction machine, for instance a shovel dredger |
| 09/26/1990 | CN2062741U Improved spiral ditching machine with main cone |
| 09/26/1990 | CN1045618A Apparatus for harnessing yellow river |
| 09/25/1990 | US4958457 Trench digging or root cutting device |
| 09/25/1990 | US4958449 Apparatus for covering drilling mud liquids in a surface depression |
| 09/20/1990 | WO1990010379A1 Spot mounder method and apparatus |