| Patents for E02D 1 - Investigation of foundation soil in situ (1,969) |
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| 12/22/1993 | CN2150241Y Open-mouth piston-type thin-walled soil sampling device |
| 12/15/1993 | EP0573718A1 Moving apparatus for the automatic collection of ground samples |
| 12/01/1993 | EP0475986B1 Method and device for in-situ measurement of ground heave characteristics |
| 11/09/1993 | US5259240 Device for in situ testing of soils that includes a vent valve adapted to close at a predetermined depth during installation |
| 10/21/1993 | DE4311032A1 Double ring tension infiltration measuring device for determining hydraulic conductivity of soil in field - has infiltration system connected to water supply system and is divided into two separate complete concentric infiltration chambers |
| 10/19/1993 | US5253519 Method and apparatus for in-situ measurement of ground heave characteristics |
| 08/11/1993 | CN2139953Y Forced water testing device for engineering geological prospecting |
| 07/08/1993 | WO1993013399A1 Audio torque indicator |
| 06/24/1993 | DE4242388A1 Tension filtrometer to determine hydraulic soil conductivity - uses infiltration assembly coupled to pressure measurement assembly determining tension during process |
| 06/23/1993 | CN2136854Y Dead load-bearing instrument for soil |
| 06/02/1993 | EP0544606A1 Penetrometer measuring head and casing for the penetrometer, and it's use |
| 05/05/1993 | CN2132177Y Manual directly-compressed soil-sampling tool |
| 04/20/1993 | US5203824 Method and apparatus for preparing the surface of a region of soil for further testing |
| 04/06/1993 | US5199194 Sea bottom sampler |
| 03/31/1993 | WO1993007462A1 Sea bottom sampler |
| 03/31/1993 | EP0534715A1 Method and apparatus for preparing the surface of a region of soil for further testing |
| 03/31/1993 | CA2097299A1 Sea bottom sampler |
| 03/24/1993 | CN1020167C Tester for soil viscosity force |
| 03/24/1993 | CA2078834A1 Method and apparatus for preparing the surface of a region of soil for further testing |
| 03/11/1993 | DE4127646A1 Measuring thermal parameters using measurement probes in ground - placing hollow steel rods into ground and inserting selected measurement probes into them according to parameters to be measured |
| 03/04/1993 | WO1993004385A1 Method of deciding bed structure and apparatus for investigating bed structure |
| 02/03/1993 | CN1068654A Intelligence comprehensive tester for soil parameters |
| 10/29/1992 | WO1992018701A1 Improvements in or relating to underwater excavation apparatus |
| 07/29/1992 | CN1063158A Pyrotechnic dynamic penetrometer |
| 07/07/1992 | US5127270 Ground characteristics analyzer |
| 06/13/1992 | WO1992010753A1 Dynamic pyrotechnical penetrometer |
| 06/13/1992 | CA2098091A1 Dynamic pyrotechnical penetrometer |
| 05/05/1992 | US5109702 Method for determining liquefaction potential of cohesionless soils |
| 04/29/1992 | EP0482074A1 Test method for boring |
| 04/14/1992 | US5103654 Tensiometer with removable wick |
| 03/31/1992 | US5099696 Methods of determining capability and quality of foundation piles and of designing foundation piles, apparatus for measuring ground characteristics, method of making hole for foundation pile such as cast-in-situ pile and apparatus therefor |
| 03/11/1992 | CN1015831B Method of evaluating compound foundation |
| 02/12/1992 | EP0470297A1 Method and device for exchanging soil, especially next to roads and buildings |
| 02/06/1992 | WO1992001839A1 Screw punch for testing loose soil |
| 01/22/1992 | CN2093863U Electric drill-rod driver for architecture |
| 12/31/1991 | US5076372 Under frame mounted soil sampler for light trucks |
| 12/18/1991 | CN1057112A Method for measuring, analysing, and judging stratum structure |
| 11/14/1991 | DE4018735A1 Soil specimen extraction arrangement - has hollow tube mounted on jib attached to rail linked to tractor hydraulic mechanism |
| 11/06/1991 | EP0455091A2 Methods for measurement, analysis and assessment of ground structure |
| 10/23/1991 | CN1014437B Densification measuring method and equipment on vehicle |
| 10/17/1991 | DE4105607A1 Drawing liq. samples from waste-water treatment plant - dividing outflow into separate sample collectors associated with compartments of tub tilted about axis |
| 10/16/1991 | EP0289520B1 Remote underwater excavator and sampler |
| 10/15/1991 | CA1290747C Method and apparatus to generate precisely-defined wall shearing stresses |
| 10/03/1991 | WO1991014832A1 Device for driving rods used primarily for soil mechanics tests into the ground |
| 10/03/1991 | CA2078326A1 Device for driving rods used primarily for soil mechanics tests into the ground |
| 09/25/1991 | EP0448462A1 Apparatus for driving rods into the ground, used in particular for ground mechanic testing |
| 09/18/1991 | CN1013980B Directional earth-filling method and apparatus for the deep-hole installation of a sensor |
| 08/20/1991 | US5040421 Measuring method of fluctuations of ground and its apparatus |
| 07/30/1991 | US5035149 Soil solution sampler |
| 07/02/1991 | US5028213 Convertible and variable-length groundwater devices, components therefor, and methods of constructing and utilizing same |
| 06/11/1991 | US5022262 Process and apparatus for determining the erodability of soil, in particular soil belonging to the underwater floor |
| 06/05/1991 | CN1051978A Soil viscosity force tester |
| 05/29/1991 | EP0429130A1 Drill point and ground drilling device. |
| 05/15/1991 | EP0427288A2 Method for measuring fluctuations of ground, and apparatus therefore |
| 05/08/1991 | CN2076574U Pocket contact-detector |
| 04/23/1991 | US5009112 Method and apparatus for conducting field dissipation and leaching studies |
| 03/13/1991 | EP0416104A1 Method of testing loose ground |
| 03/06/1991 | CN1011916B Car for testing strength of earth with loading plate |
| 02/27/1991 | EP0413696A1 Impact testing apparatus |
| 02/19/1991 | US4993500 Automatic drive hammer system and method for use thereof |
| 01/24/1991 | WO1991000951A1 Test method for boring |
| 01/22/1991 | US4986120 Low-water-pressure controlled hydrologic test method |
| 01/15/1991 | US4984447 Soils percolation testing apparatus |
| 01/01/1991 | US4981393 Method and apparatus for cellularly isolating, treating and/or removing strongly polluted material present in or on the soil |
| 12/18/1990 | US4977965 Automatic drop hammer system |
| 12/12/1990 | CN1047734A Method of evaluating compound foundation |
| 12/10/1990 | WO1990015324A1 Method and device for in-situ measurement of ground heave characteristics |
| 12/10/1990 | CA2058981A1 Method and device for in-situ measurement of ground heave characteristics |
| 11/27/1990 | US4973165 Method of generating precisely-defined wall shearing stresses |
| 11/22/1990 | DE3915768A1 Extracting soil specimen from covering of deposit - ramming hollow core tube through all layers of covering whilst reducing mineral refilling |
| 11/21/1990 | CN2066037U Multi-functional electric beating instrument |
| 10/24/1990 | CN2064374U Power reconnaissance machine |
| 10/10/1990 | CN2063539U Motor-driven hammer drill for making holes in rock |
| 10/04/1990 | WO1990011411A1 Method of testing loose ground |
| 10/03/1990 | EP0389956A1 Automatic drive hammer apparatus |
| 09/05/1990 | CN2061691U Automatic loading device for lever-type consolidometer |
| 08/01/1990 | CN2059925U Core sample extracting machine in spodosol |
| 07/11/1990 | CN1043763A Method for determining and designing the performance and quality of foundation piles, apparatus for measuring the performance of foundations and method and apparatus for drilling holes of foundation.. |
| 07/04/1990 | EP0376340A2 Methods of determining capability and quality of foundation piles and of designing foundation piles, apparatus for measuring ground characteristics, method of making hole for foundation pile such as cast-in-situ pile and apparatus therefor |
| 06/29/1990 | CA2006945A1 Methods of determining capability and quality of foundation piles and of designing foundation piles. apparatus for measuring ground characteristics, method of making hole for foundation pile such as cast-in-situ pile and apparatus therefor. |
| 06/20/1990 | CN1008462B Reversely-fitted circlip type self-controlling on and off long cyclinder engineering geological soft soil-grit sampler |
| 06/13/1990 | CN1042992A Densification measuring method and equipment on vehicle |
| 06/12/1990 | US4932144 Remote underwater excavator and sampler |
| 05/08/1990 | US4923333 Lysimeter for leak detection and method of assembly thereof |
| 04/19/1990 | DE3834846A1 Method and device for the examination of the surface condition in terrain which is difficult to access or inaccessible |
| 04/19/1990 | DE3834845A1 Method and device for the examination of the surface condition in terrain which is inaccessible or difficult to access |
| 04/11/1990 | CN1041195A Freezing method for collecting undisturbed saturated sand samples |
| 02/06/1990 | US4899320 Downhole tool for determining in-situ formation stress orientation |
| 01/04/1990 | DE3821899A1 Method for the removal of contaminated heterogeneous mixtures from landfill sites or the like |
| 01/04/1990 | DE3821823A1 Method for determining the air permeability of water-conducting soils, and a system and devices for carrying it out |
| 12/13/1989 | EP0346099A2 Low-water-pressure controlled hydrologic test method |
| 12/05/1989 | US4884892 Method and apparatus to generate precisely-defined wall shearing stresses |
| 11/30/1989 | DE3817691A1 Method of removing special waste from a deposit site |
| 10/31/1989 | US4876895 Engineering constructive load cell |
| 09/26/1989 | US4869371 Groundwater sampling kit |
| 09/26/1989 | CA1259982A1 Combination soil auger and soil core sampler with sample retaining capacity |
| 08/31/1989 | DE3903923A1 Device for determining the E-modulus (modulus of elasticity) |
| 08/30/1989 | CN2043630U A new type standart penetrating apparatus |
| 08/10/1989 | WO1989007176A1 Impact testing apparatus |
| 07/12/1989 | CN2040920U Electromagnetic hammer for boring |