| Patents for F16L 15 - Screw-threaded joints; Forms of screw-threads for such joints (5,444) |
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| 01/04/2000 | US6010163 Threaded joint for connecting two pipes with a metal to metal seal |
| 01/04/2000 | US6009611 Method for detecting wear at connections between pin and box joints |
| 12/23/1999 | WO1999066170A1 Drill rod coupling |
| 12/15/1999 | EP0778928B1 Pipe joint |
| 12/07/1999 | US5997049 Adjustable leak-tight coupling system |
| 12/07/1999 | US5997045 Pipe joint |
| 12/01/1999 | CN2351541Y Non-hoop double-stage synchronous screwed pipe |
| 11/25/1999 | DE19827821C1 Joint for drill rod sections |
| 11/17/1999 | EP0957233A2 Threaded connector |
| 11/11/1999 | WO1999049171A3 Threaded assembly of metal tubes designed to contain a corrosive fluid |
| 11/11/1999 | WO1999043974A9 Threaded connection for internally clad pipe |
| 11/03/1999 | CN2347033Y Fast connecting pipe piece |
| 11/03/1999 | CN2347032Y Pipeline universal active joint |
| 11/03/1999 | CN1233722A Screw-threat joint for radiator |
| 10/27/1999 | CN2345824Y Strong pipe fitting for pipe without mantle fiber |
| 10/27/1999 | CN1046023C Self-locking quick pipe connector |
| 10/26/1999 | US5971443 Threaded joint for pipes |
| 10/21/1999 | WO1999053232A1 Screw joint for oil well piping |
| 10/20/1999 | CN2344633Y Expansion joint for plastic pipe |
| 10/13/1999 | EP0949441A1 Screw joint for oil well pipes and method of manufacturing same |
| 10/13/1999 | CN2343452Y Halberd-shape joint for composite glass fibre thermal insulation blast pipe |
| 10/12/1999 | US5964486 Pipe connectors |
| 10/07/1999 | DE19814437A1 Water connection fitting for a domestic washing machine or dish washing machine |
| 10/06/1999 | CN1230649A Connector for securing heat exchanger tube to heating vessel bulkhead |
| 09/30/1999 | WO1999049257A1 Pipe coupling |
| 09/30/1999 | WO1999049171A2 Threaded assembly of metal tubes designed to contain a corrosive fluid |
| 09/29/1999 | CN2341003Y Mechanical structure for locking pipe joint |
| 09/29/1999 | CN2341002Y Internal and external screw connecting pipe joint |
| 09/28/1999 | US5957508 Sealing device |
| 09/28/1999 | CA2160436C Threaded tube assembly |
| 09/23/1999 | WO1999047786A1 Two-step, differential diameter wedge threaded connector |
| 09/23/1999 | WO1999047785A1 Two-step, low torque wedge thread for tubular connector |
| 09/22/1999 | CN2339829Y Water-meter pipe adaptor |
| 09/02/1999 | WO1999043974A1 Threaded connection for internally clad pipe |
| 09/01/1999 | CN2336175Y Hose coupling device |
| 08/25/1999 | CN2334984Y Screw-threaded joint for pipe |
| 08/11/1999 | CN2332865Y Plastic pipe fitting |
| 08/04/1999 | CN2331817Y Union elbow for gas meter |
| 08/03/1999 | US5931511 Threaded connection for enhanced fatigue resistance |
| 07/28/1999 | EP0897504A4 Threaded tool joint with dual mating shoulders |
| 07/21/1999 | CN1044279C Pipe screw joint composed of pin shape part and box shape part |
| 07/14/1999 | CN2328845Y Pipe fitting for water central heating |
| 07/13/1999 | US5921591 Pipe connecting assembly and method for joining two lengths of pipe by a press-fit connection |
| 07/13/1999 | US5921590 Flexible swivel coupling for underground sprinkler systems |
| 07/07/1999 | CN2327864Y Composite yoke |
| 07/01/1999 | DE19752363A1 Screw connection for medium carrying pipe |
| 06/30/1999 | CN2326811Y Pipe connection device |
| 06/23/1999 | CN1220716A Threaded joint for tubes |
| 06/16/1999 | CN2324366Y Fast-mounting sealing pipe joint |
| 06/12/1999 | CA2255360A1 Male hose coupler |
| 06/10/1999 | WO1999028665A1 Pipe joint |
| 06/10/1999 | WO1999028637A1 Sealing threaded pairing |
| 06/09/1999 | CN2323228Y Quick pipe joint with locking ring |
| 06/09/1999 | CN2323227Y Self-locking quick pipe joint |
| 06/02/1999 | CN2322013Y Plastic pipe joint |
| 06/01/1999 | US5908212 Oilfield tubular threaded connection |
| 05/26/1999 | CN2320868Y 可调式管接头 Adjustable fittings |
| 05/26/1999 | CN2320867Y Pipe joint |
| 05/26/1999 | CN1217445A Airtight threaded connection |
| 05/26/1999 | CN1217426A Pipe adaptor |
| 05/25/1999 | US5906402 For a fluid conduit |
| 05/25/1999 | US5906399 Threaded joint for metal tubes with internal coating |
| 05/25/1999 | US5906398 Threaded joint for two tubular plastic parts |
| 05/19/1999 | EP0916883A1 Screw joint for oil well pipe |
| 05/12/1999 | CN2318493Y Convenient pipe joint |
| 05/05/1999 | CN2317379Y Pipe joint |
| 04/29/1999 | WO1999008034A9 Tubular connection |
| 04/22/1999 | WO1998044236A9 Threaded joint for tubes |
| 04/21/1999 | EP0792429A4 High-pressure fiber reinforced composite pipe joint |
| 04/21/1999 | CN2315406Y 专用复合管接头 Special composite pipe fittings |
| 04/20/1999 | US5895079 Threaded connections utilizing composite materials |
| 04/15/1999 | WO1999018382A1 Screw joint for oil well pipes and method of manufacturing same |
| 03/31/1999 | EP0905428A2 Adjustable leak-proof coupling |
| 03/30/1999 | US5887908 Pipe swivel joint assembly |
| 03/24/1999 | CN2311682Y 管子连接件 Pipe fittings |
| 03/11/1999 | WO1999011963A1 Pipe connector |
| 03/11/1999 | DE19739458A1 Rohrverbinder Pipe Connector |
| 03/10/1999 | CN2310227Y Sealing joint for solar energy vacuum tube |
| 02/24/1999 | EP0897504A1 Threaded tool joint with dual mating shoulders |
| 02/24/1999 | EP0897499A1 A pipe joint and a gasket therefor |
| 02/24/1999 | CN2308790Y Tube joint |
| 02/18/1999 | WO1999008034A1 Tubular connection |
| 01/12/1999 | CA2195523C Drill pipe with improved connectors |
| 01/06/1999 | CN1204379A Tubing connector |
| 12/30/1998 | CN2302384Y Variable diameter joint for water well |
| 12/23/1998 | CN2301592Y Quick connection device for pipeline |
| 12/17/1998 | WO1998057087A1 Pipe threaded joint assembly |
| 12/16/1998 | EP0670021B1 Pipe connecting assembly and method for joining two lengths of steel pipe by a press-fit connection |
| 12/16/1998 | CN2300783Y Metal, rubber-plastics composite pipe cover |
| 12/16/1998 | CN2300782Y Pipe line joint device |
| 12/15/1998 | US5848813 Threaded port for fluid flow connection |
| 12/08/1998 | CA2128060C Pipe coupling |
| 12/03/1998 | WO1998054501A1 Screw joint for oil well pipe |
| 12/02/1998 | EP0771400A4 Drill pipe with improved connectors |
| 11/26/1998 | WO1998053177A1 Stress reduction groove for tubular connection |
| 11/18/1998 | CN1040791C Integral joint for connecting two pipes |
| 11/17/1998 | US5837083 Method of forming a rigid tubular body |
| 11/12/1998 | WO1998050721A1 Ultra high torque double shoulder tool joint |
| 11/12/1998 | WO1998050720A1 Threaded connection for enhanced fatigue resistance |
| 11/12/1998 | CA2288740A1 Threaded connection for enhanced fatigue resistance |