Patent Inventor: Jyri Jarvenkyla
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Tubular product
Inventor: Kirjavainen, et al. | Patent Number: 7381454
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Pipe
Inventor: Kirjavainen, et al. | Patent Number: 7077164
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Branchtubing for pipework
Inventor: Smahl, et al. | Patent Number: 7007716
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Heat fusion fitting
Inventor: Harget, et al. | Patent Number: 6998588
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Multilayer pipe and method for manufacturing one
Inventor: | Patent Number: 6959736
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Apparatus for extrusion of polymers and plastic products formed with the apparatus
Inventor: | Patent Number: 6689472
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Method of manufacturing branched pipe, pipe manufacturing apparatus and branched pipe
Inventor: | Patent Number: 6672324
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Method and apparatus for using recycled plastic material, and a plastic product made by an extruder
Inventor: Jarvenkyla | Patent Number: 6638589
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Heat fusion fitting
Inventor: Harget, et al. | Patent Number: 6585924
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Method and arrangement for cooling an extruded hollow product
Inventor: Kirjavainen, et al. | Patent Number: 6551534
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Plastic pipe having a socket, and a method of providing a plastic pipe with a socket
Inventor: Jarvenkyla, et al. | Patent Number: 6550500
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Method of producing homogeneous material with an extruder, an extruder, and a multilayer plastic pipe
Inventor: Hippelainen, et al. | Patent Number: 6446674
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Method and apparatus for molding plastic
Inventor: Kirjavainen, et al. | Patent Number: 6416211
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Method of manufacturing branched pipe
Inventor: Jarvenkyla | Patent Number: 6372168
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Extrusion of high molecular weight polymers
Inventor: Jarvenkyla, et al. | Patent Number: 6309574
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Extrusion method, extruder and extruded product
Inventor: Kirjavainen, et al. | Patent Number: 6306326
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Method for lining underground pipelines
Inventor: Agren, et al. | Patent Number: 6302983
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Biaxial stretching of plastic tubes
Inventor: Chapman, et al. | Patent Number: 6296804
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Method and apparatus for preparing an extrudable product, and an extruded product
Inventor: Kirjavainen, et al. | Patent Number: 6274071
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Extruder with rotor and bearings that receive forces acting on the rotor
Inventor: Kirjavainen, et al. | Patent Number: 6217206
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Apparatus and method for adjusting a mandrel and kernel while producing a plastic pipe
Inventor: Holso, et al. | Patent Number: 6210617
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Extrusion method, extruder and extruded product
Inventor: Kirjavainen, et al. | Patent Number: 6203740
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Method and apparatus for making an extrusion product, and an extrusion product
Inventor: | Patent Number: 6203651
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Extrusion apparatus and method for orienting plastic material by using an extrusion apparatus
Inventor: Kirjavainen, et al. | Patent Number: 6197239
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Method for making a product to be extruded, and an extruder
Inventor: Kirjavainen, et al. | Patent Number: 6187237
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Multi-layer reinforced and stabilized cable construction
Inventor: Ravela, et al. | Patent Number: 6178277
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Co-extruder multilayer plastic pipe, method for producing the same, and device therefor
Inventor: Jarvenkyla | Patent Number: 6176269
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Method for joining plastic pipes, a joint ring used in the joining and a pipe joint provided with the method
Inventor: Jarvenkyla | Patent Number: 6149756
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Method for heating and/or cross-linking of polymers and apparatus therefor
Inventor: Sjoberg, et al. | Patent Number: 6106761
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Extruder with supply conduit for supplying even flow of material
Inventor: | Patent Number: 6086239
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Method for producing homogeneous material with an extruder, an extruder, and a multilayer plastic pipe
Inventor: Hippelainen, et al. | Patent Number: 6073657
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Sizing apparatus
Inventor: Chapman, et al. | Patent Number: 6050800
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Method for manufacturing a corrugated pipe, and a corrugated pipe manufactured by the method
Inventor: | Patent Number: 5975143
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Branch pipe connection
Inventor: | Patent Number: 5957505
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Method of socketing a pipe
Inventor: Johansson, et al. | Patent Number: 5928451
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Method of forming a multi-layer plastic pipe for conducting fluids
Inventor: | Patent Number: 5759461
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Socket joint for plastic pipes
Inventor: | Patent Number: 5653452
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Method and apparatus for forming ribs with sideward projections in a plastic pipe, and a plastic pipe
Inventor: | Patent Number: 5589127
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Pipes with integral sockets
Inventor: Macovaz, et al. | Patent Number: 5526847
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Method and apparatus for orienting plastic of a pipe
Inventor: Jarvenkyla | Patent Number: 5449487
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Apparatus for manufacturing ribbed pipes
Inventor: Jarvenkyla, et al. | Patent Number: 5340299
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Pipe manufacturing line
Inventor: Scharwachter, et al. | Patent Number: 5171500
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Method and apparatus for manufacturing ribbed pipe
Inventor: Holso, et al. | Patent Number: 5139730
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Device for producing a grate construction and a grate construction
Inventor: Jarvenkyla | Patent Number: 5018959
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Method and an apparatus for the production of ribbed pipes
Inventor: Jarvenkyla | Patent Number: 4988466
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Method and apparatus for the production of pipe
Inventor: Jarvenkyla, et al. | Patent Number: 4952362
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Method and device for extrusion of a double wall plastics pipe
Inventor: Jarvenkyla, et al. | Patent Number: 4933134
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Method for the formation of a hole in a plastic pipe
Inventor: Jarvenkyla | Patent Number: 4873048
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Apparatus and a method for the production of ribbed pipes
Inventor: Jarvenkyla, et al. | Patent Number: 4867928
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Method and an apparatus for the extrusion of plastic pipes
Inventor: Jarvenkyla | Patent Number: 4865797
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Method and device for extrusion of a double wall plastics pipe
Inventor: Jarvenkyla, et al. | Patent Number: 4790975
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Method and an apparatus for the production of ribbed pipes
Inventor: Jarvenkyla | Patent Number: 4721594
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Plastic pipe
Inventor: | Patent Number: 4690174