Patents
Sitemap › E02 - Hydraulic engineering; Foundations; Soil-shifting › E02B - Hydraulic engineering › E02B 13 - Irrigation ditches, i.e. gravity flow, open channel water distribution systems
Patents for E02B 13 - Irrigation ditches, i.e. gravity flow, open channel water distribution systems (1,251)
05/1994
05/25/1994CN2166155Y Cover for channel
05/19/1994DE4238830A1 Verfahren zum hydraulischen Verzweigen einer offenen Strömung sowie hydraulisch arbeitende Kanalverzweigung A method for hydraulic branching of an open flow and hydraulically operated channel branching
01/1994
01/18/1994CA2074139A1 Enclosed hydraulic irrigation system
01/16/1994CA2073892A1 Watering gutters
11/1993
11/02/1993US5257643 Dry hydrant
09/1993
09/28/1993US5248217 Process for forming notches in an irrigation lateral
06/1993
06/22/1993US5221158 Irrigation and drainage method and apparatus
06/16/1993EP0546848A2 Flow-controlled irrigation system
06/09/1993EP0545495A2 By-pass arrangement for controlling the return flow of a pilot valve connected into an irrigation network
05/1993
05/26/1993CN1020936C Irrigation and drainage system with functions of flood prevention and soil conservation
05/25/1993CA1318138C Method and apparatus for forming a continuous plastic sheet
05/18/1993US5211426 Point irrigation apparatus with branch connections
04/1993
04/15/1993CA2120758A1 Oil absorption method and apparatus utilizing a replaceable bladder
03/1993
03/09/1993US5192426 Water reclamation system for landscape irrigation
01/1993
01/06/1993CN1067696A New cultivating method able to resisting flood and drought
01/05/1993US5176163 Flow-controlled irrigation system
12/1992
12/30/1992CN2126252U Smallsize ditch water gate
12/30/1992CN2126251U Split plastic antiseep semicircle trough for water transfusion
11/1992
11/11/1992CN2121480U Irrigation ditch water-saving busket gate
11/03/1992US5160214 Irrigation system and irrigation method
10/1992
10/27/1992US5158396 Adjustable levee gate
10/20/1992US5156489 Adjustable flume
10/20/1992US5156488 For burial in the earth
10/14/1992CN2118749U Hand driven type paving machine
09/1992
09/23/1992CN2116712U Safety type irrigation ditch opening and closing device
09/09/1992CN1064330A Floating water intake
08/1992
08/26/1992EP0500270A2 Floating water-intake
08/18/1992CA1306365C Fluid flow channeling means
08/04/1992US5135334 Method and apparatus of water-saving irrigation system
06/1992
06/03/1992CN2106192U Low rotation speed large flow spiral ditch
05/1992
05/26/1992CA1301813C Irrigation system and method
05/19/1992US5113889 Floating intake for transport of liquid from a fixed depth below the surface of a reservoir
05/13/1992CN2104242U Irrigation ditch antiseep pressure reducing valve
04/1992
04/09/1992DE4031852A1 Ground water level raising - using slit trench degassed by initial bottom supply of water
03/1992
03/25/1992CN2099776U Low pressure pipeline water carriage irrigation valve
01/1992
01/22/1992CN2093862U High-pressure rotary gate
12/1991
12/18/1991CN2090833U Pressure reducer for preventing seepage of irrigation ditch
12/18/1991CN1057081A Valve for pulsation transport of irrigational liquid and mating equipment
10/1991
10/29/1991US5061116 Reinforced structural elements
10/01/1991US5052855 Method and apparatus for providing water for irrigating turf grass
09/1991
09/18/1991CN2084948U Water drain valve of concealed canal
05/1991
05/29/1991DE4037396A1 Irrigation line - has central hose with porous surround to bury at root level
05/21/1991US5017041 Leaching system conduit with high rigidity joint
05/14/1991US5015122 System permitting channeling of drainage fluid
04/1991
04/03/1991EP0420732A1 Trickle irrigation device with branch couplings
03/1991
03/30/1991CA2026085A1 Point irrigation apparatus with branch connections
03/26/1991CA1281909C Riser assembly for a sub-surface irrigation and drainage system
09/1990
09/12/1990CN1009524B Under-ground flexible pipe water-conveying method
08/1990
08/29/1990EP0384638A2 Drainage channel
07/1990
07/24/1990US4943184 Irrigation device
07/17/1990US4941501 For controlling the watering of a patch of earth
06/1990
06/26/1990US4937732 Irrigation controller
06/13/1990CN1042961A Irrigation and drainage system with functions of flood prevention and soil conservation
06/05/1990US4930934 Surface, subsurface, continuous feed moisture maintenance system apparatus and method
05/1990
05/01/1990US4922433 Automatic irrigation water conservation controller
04/1990
04/11/1990CN1041194A Flood-controlling and soil-conserving irrigation and drainage system
02/1990
02/27/1990US4904112 Underground irrigation system
02/21/1990CN2053225U Fabricated structural board for canal
11/1989
11/15/1989CN2047676U Constant-flow bucket
11/07/1989US4878782 Drain channel alignment and installation apparatus
10/1989
10/25/1989EP0338071A1 Irrigation controller
10/18/1989EP0337974A1 Installation for canalizing the flow of a liquid
09/1989
09/06/1989CN2043982U Self-flow-irrigating valve
07/1989
07/11/1989CA1257101A1 Land drainage system
06/1989
06/13/1989US4838734 Method and device for forming a fluid permeation control layer of the ground
05/1989
05/09/1989US4828432 Apparatus for forming a continuous plastic sheet
05/05/1989WO1989004010A1 Irrigation controller
05/03/1989DE3735679A1 Arrangement for raising the groundwater level, method of producing the arrangement, and apparatus for carrying out this method
03/1989
03/14/1989US4812082 Underground surge irrigation system
11/1988
11/29/1988US4787776 Earthen recess is covered by cloth coated with curable liquid silicone elastomer;
11/17/1988WO1988008901A1 Irrigation system
11/17/1988EP0290527A1 Sub-surface irrigation system
10/1988
10/26/1988CN87212470U Water supply device
10/25/1988CA1243496A1 Portable form for lining irrigation ditches
10/05/1988CN87215737U Folding rubber dam
08/1988
08/09/1988CA1240160A1 Method and device for insulation of the ground
05/1988
05/11/1988EP0267013A2 Method and apparatus for forming a continuous plastic sheet
05/05/1988WO1988003195A1 Sub-surface irrigation system
04/1988
04/05/1988US4735525 Irrigation channel gates
01/1988
01/26/1988US4721408 Water distribution system
12/1987
12/09/1987CN86103780A Horizontal vacuum continuous ingot casting machine
11/1987
11/04/1987CN87101342A Under-ground flexible pipe water-conveying method
11/03/1987US4704047 Land drainage system
08/1987
08/11/1987US4685828 Irrigation channel gate
07/1987
07/07/1987US4678368 Canal covering system and method of installing same
07/07/1987US4678367 Riser assembly for a sub-surface irrigation and drainage system
06/1987
06/16/1987US4673128 Method and system for furrow irrigation
05/1987
05/19/1987US4666337 Method and device for insulation of the ground
11/1986
11/12/1986EP0201478A1 Sliding gate for blocking or regulating the flow of water in gutters
11/11/1986US4621945 Head control stand
10/1986
10/29/1986EP0199598A2 Improved land drainage system
10/07/1986US4615642 Variable porosity irrigation pipe
03/1986
03/25/1986US4577802 Method and system for furrow irrigation
03/18/1986US4576512 For controlling the flow through a canal sluice
12/1985
12/31/1985US4561801 Method and apparatus for inhibiting erosion
12/10/1985US4557633 Portable form for lining irrigation ditches
10/1985
10/29/1985US4549837 Penstock
09/1985
09/17/1985US4541563 Electronic valve control apparatus
07/1985
07/09/1985US4527927 Water harvesting and storage system
06/1985
06/12/1985EP0144164A1 A method and device for insulation of the ground
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