Inventors list

Assignees list

Classification tree browser

Top 100 Inventors

Top 100 Assignees


Pipes and tubular conduits

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
138118000 FLEXIBLE 268
138103000 COMBINED 207
138140000 DISTINCT LAYERS 205
138097000 REPAIRING 123
138037000 WITH FLOW REGULATORS AND/OR BAFFLES 101
138026000 WITH PRESSURE COMPENSATORS 100
138089000 WITH CLOSURES AND PLUGS 97
138177000 STRUCTURE 90
138111000 PLURAL DUCT 52
138155000 JOINED SECTIONS 37
138096000 END PROTECTORS 26
138032000 THAWING AND FREEZE PROTECTION 20
138172000 REINFORCED 19
138156000 LONGITUDINALLY SEAMED 14
138154000 SPIRALLY SEAMED 4
20090301597DUCT ELEMENT FORMING AN AIR-CHANNEL FOR AIR HANDLING SYSTEMS - The object of the invention is thus a duct element made of a band-shaped strip (12-10-2009
20110030834 MULTI-LAYERED CORRUGATED TUBULAR ARTICLE - The present invention provides a multi-layered corrugated cylindrical tubular structure formed from a strip (02-10-2011
20110000573TUBULAR ARTICLE - The present invention provides a strip and a tubular article formed from said strip which may, for example, be used in the oil and gas industry for transporting fluids which may be volatile fluids or corrosive fluids and which may be at elevated temperatures and/or pressure. The strip includes a plurality of combined step (joggle) and rib arrangements. In the finished assembled article, the strip is wound in helically self-overlapping relationship such as to allow corresponding step portions to sit one within the other. The step effectively provides the dual function of a joggle and a rib as known in the art and does so in a manner that reduces the forming stresses in the material and increases the strength of the final article.01-06-2011
20120152397Frame Tube for Light-Weighted Bicycle Frame - A frame tube for a light-weighted bicycle frame includes a spiral tube body having multiple spiral turns and made by processing 6-4 titanium, ASTM A313 or ASTM A564 high-strength stainless steel alloy sheet material of thickness under 1 mm. Each two adjacent spiral turns of the spiral tube body is bonded together by welding. A plurality of pores is formed in the spiral tube body to reduce the weight of the frame tube and to enhance its shock-absorbing capability.06-21-2012
138036000 WITH WEAR INDICATOR 2
20120222766FLEXIBLE HOSE WITH WEAR INDICATOR - The present disclosure relates to a flexible hose that has an outer jacket which includes a continuous layer and a plurality of protrusions extending radially outward from the continuous layer. The protrusions are in spaced relation to one another and extend along a longitudinal axis of the hose. When one of the at least one protrusions is abraded, a greater portion of the continuous layer is revealed in an area below the abraded protrusion, indicating that the continuous layer is susceptible to potentially damaging wear.09-06-2012
20120222765FLEXIBLE HOSE WITH WEAR INDICATOR - The present disclosure relates to a flexible hose that has an outer jacket which includes a continuous layer and a plurality of protrusions connected to and extending radially outward from the continuous layer. The protrusions are in spaced relation to one another and extend along a longitudinal axis of the hose. The continuous layer has a first color and at least one of the plurality of protrusions has a second color that is different from the first color. When one of the at least one protrusions is abraded, the first color of the continuous layer is revealed in an area below the abraded protrusion, indicating that the continuous layer is susceptible to potentially damaging wear.09-06-2012

Patent applications in all subclasses Pipes and tubular conduits