Patents
Sitemap › E03 - Water supply; Sewerage › E03B - Installations or methods for obtaining, collecting, or distributing water › E03B 7 - Water main or service pipe systems
Patents for E03B 7 - Water main or service pipe systems (5,081)
08/1992
08/12/1992CN1017814B Compound pot pneumatic feed water system
07/1992
07/29/1992CN1063133A Pressure-gradient type self-closing water tap
07/22/1992EP0258315B1 Fluid restrictor for a valve
07/21/1992US5131423 Pinch valve control system for water line isolation and method
07/15/1992CN2110037U Automatic water feeder for fixing water level
07/14/1992CA1305013C Dump valve assembly
07/07/1992US5127427 Drinking water faucet
06/1992
06/16/1992CA1303460C Method of preventing freezing in pipes, and a piping system for carryingout the method
06/10/1992CN2106854U Safety and sanitory automatic water economizer
06/10/1992CN2106853U Diameter-limiting water economizer
06/03/1992CN2106194U Stop water ball for water supply and drainage
06/02/1992CA1302309C Nonfreezing pipe
05/1992
05/21/1992DE4113805C1 Subsequent fitting system for installed pipeline - has crosspiece with deflector baffle and interconnecting line for two crosspiece branches
05/20/1992CN2104884U Dew collector for water pipe
05/19/1992US5113892 Freeze control and drain valve
05/19/1992US5113891 Water freeze guard valve
05/06/1992EP0484193A1 Water meter installation protected against frost
05/01/1992CA2054538A1 Water-metering installation protected against frost
04/1992
04/29/1992CN2102954U Permanent cleaning apparatus for running water of household
04/28/1992US5107883 Pinch valve control system for water line isolation and method
04/28/1992CA1299561C Heat exchanging apparatus
04/22/1992CN2102313U Automatic backwater anti-freezing device for running water
04/22/1992CN2102312U Anti-freezing device for running water pipe
04/08/1992CN2101057U Pneumatic water feeder automatic air supply device
03/1992
03/19/1992WO1992004567A1 Water meter assemblies
03/18/1992EP0475699A1 Abandonment of a branch main
03/12/1992DE4028529A1 Domestic water purifier - has filters, chemical cleaning and sterilising units, bar-coded filter elements and microprocessor control
03/11/1992EP0222858B2 Pipe cut-off device
03/11/1992CN2098521U Device preventing back-flow of jet from being frozen
03/11/1992CN2098520U Device preventing bursting of outdoor water pipe by freezing
02/1992
02/26/1992CN1059007A Reliable connection of pipe line net system
02/25/1992US5090436 Temperature sensitive water supply shut-off system
02/18/1992CA2023576A1 Buck derrick drain valve
02/12/1992CN2095884U Self-control valve by water power
02/04/1992CA1295210C Device for connecting and supporting a water-meter
01/1992
01/29/1992CN2094573U Freeze proof valve for underground running water pipe
01/21/1992US5082018 System for preventing loss of water from the water line of a building
01/21/1992US5082013 Firefighting water delivery system and method
01/14/1992US5080527 Drain apparatus
01/09/1992WO1992000478A1 Automatic fluid flow sensor and fluid shut-off system
12/1991
12/31/1991US5076321 Flow sensitive fluid shutoff safety device
12/27/1991EP0332681B1 Improved firestop stack fitting
12/25/1991CN2091313U Power domestic magnetic water unit
12/19/1991DE4036684C1 Water pipe section tester esp. for hydrant or slide valve - has sound pick=up on one side and piezo-discs on other side of receptor
12/18/1991CN2090838U Cistern with controlling mechanism for level of filtered water
12/04/1991CN2089948U Compensator of water meter
11/1991
11/27/1991CN2089485U Frozen-proof device for running water supply
11/27/1991CN1056562A Grafted protector for resisting frost crack
11/06/1991CN2088136U Pipeline bundle for house equipment
11/06/1991CN2088127U Water stop self-closing valve
11/06/1991CN2088126U Water-saving valve
10/1991
10/30/1991EP0454027A2 Adhesive for inner lining hose of water tube
10/30/1991CN2087637U Water supply-control freezing-prevention device for running water
10/30/1991CN2087636U Plastics water supply device
10/30/1991CN2087635U Domestic water pumping device
10/23/1991CN2087215U Constant pressure reducing valve
10/22/1991US5058627 Freeze protection system for water pipes
10/16/1991EP0260303B1 Automatic flow-control device
10/15/1991US5056554 Fluid loss, damage prevention and control system
10/02/1991CN2085813U Flow spatter preventing device for running water tap
10/02/1991CN1014181B Connecting and fixing device for water meter
10/01/1991US5052721 Water meter service coupling
09/1991
09/25/1991CN2085453U Frost valve for tap water
09/18/1991EP0446507A1 Assembly for controlling and/or metering a fluid flow
09/12/1991DE4008026A1 Pressure buffer for water supply etc. - consists of outer container moulded in two halves joined together and inner pressurised nitrogen reservoir enclosed in diaphragm
09/05/1991DE4006444A1 Flow-dependent reversal valve - allows automatic channelling of different fluid amounts
09/04/1991EP0444974A1 Method and device for the replacement of underground pipelines
08/1991
08/28/1991CN2083596U Pneumatic running water freezing-proof device
08/20/1991US5040922 Method for repairing an inaccessible sewage pipe leading away from a house using a remote-controlled apparatus operating in the main sewage pipe
08/14/1991EP0350485A4 A heating and insulation arrangement for a network of installed pipes and method
08/07/1991EP0354914B1 Heat exchanging apparatus
08/07/1991EP0349575B1 Method of preventing freezing in pipes, and a piping system for carrying out the method
08/02/1991CA2034852A1 Process and device for replacing an underground pipe
07/1991
07/30/1991US5035796 Liquid line chlorine cleaner
07/24/1991CN2081404U Domestic automatic water-stoped unit
07/24/1991CN2081403U Flow limiting device
07/23/1991US5033500 Freeze valve apparatus
07/23/1991CA1286614C Heating and insulation arrangement for a network of installed pipes andmethod
07/17/1991CN2080954U Water-saving and anti-freezing device for water tap in open
07/17/1991CN2080953U Device for normal flow of running water without water tower
07/16/1991CA1286278C Automatic flow-control device
07/10/1991CN2080531U 饮用水净化器 Drinking water purifier
06/1991
06/04/1991US5020569 Vented faucet system
05/1991
05/30/1991WO1991007614A1 Water tap
05/29/1991EP0429292A1 A water meter and stopvalve block
05/15/1991CN2076994U Antifreezing piece
05/14/1991US5014752 Water supply pipe
05/14/1991US5014731 Method for preventing freezing in pipes, and a piping system for carrying out the method
05/08/1991CN2076575U Automatic flushing valve for preventing blockage
04/1991
04/30/1991US5011598 Domestic lead purging system for treating stagnated water
04/16/1991CA1283000C Water/air pumping system
04/10/1991CN2074778U Water cutting-off automatic closing safety tap
04/10/1991CN1050582A Quick fixing water supply pipe device
04/02/1991US5004014 Automatic fluid flow sensor and fluid shut-off system
04/02/1991US5004012 Automatic water shut-off apparatus for building protection
03/1991
03/27/1991CN2073904U Water-saving antifreezing hydrant for running water
03/27/1991CN2073903U Preventing freezing backwater valve for running water
03/13/1991CN2072993U Automatic water-feeding valve
03/06/1991CN2072428U Waste water recovery saving device
03/06/1991CN1049696A Floating apparatus for obtaining and purifying water
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