| Patents for B21B 25 - Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group; Accessories or auxiliary means therefor (1,103) |
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| 01/03/1990 | EP0348595A2 A spindle for pilgrim-process rolling mill |
| 11/15/1989 | CN1037100A Process and device for making hollow billets into tube |
| 10/04/1989 | EP0335079A2 Method and device for making tubes from loops |
| 09/26/1989 | CA1261684A1 Process for application of a free-flowing material on the inner surface of a tube blank and device for performing the process |
| 09/26/1989 | CA1259828A1 Method and device for increasing the output of pilger cold rolling mills |
| 09/19/1989 | US4866968 High strength cemented carbide dies and mandrels for a pilgering machine |
| 09/19/1989 | US4866966 Method and apparatus for producing bypass grooves |
| 06/22/1989 | DE3742155A1 Method and apparatus for producing seamless tubes |
| 06/07/1989 | EP0156922B1 Cross helical rolling mill for seamless steel tubes. |
| 04/04/1989 | CA1251954A1 Cross helical rolling mill |
| 12/13/1988 | US4790263 Process for application of free-flowing material on the inner surface of a tube blank and device for performing the process |
| 11/24/1988 | DE3715803A1 Vorrichtung zum radialen fuehren von rotierenden dornstangen und rohrluppen Apparatus for radial lead by rotating mandrel rod and tube blanks |
| 09/20/1988 | US4771624 Thrust mount for tube rolling mills |
| 05/25/1988 | CN86106418A Coated composite piercer head for pipe mill |
| 05/11/1988 | EP0267128A1 Snap-fastening device for retaining a rotating mandrel |
| 02/16/1988 | US4724697 Mandrel rod holding device |
| 01/07/1988 | EP0250881A1 Process for applying a fluent material to the inner side of a hollow body, and apparatus for carrying out the process |
| 12/22/1987 | US4713955 Method permitting the increase of operations of cold pilger mills and an apparatus for the embodiment of this method |
| 12/08/1987 | US4711733 Gilsonite, graphite and resin particles |
| 12/05/1987 | CN86207635U Automatic replacing equipment of a conic tip of a automatic pipe rolling mill |
| 07/21/1987 | CA1224349A1 Apparatus for the lateral transfer of mandrels in a tube rolling mill |
| 07/16/1987 | WO1987004092A1 A method for primarily extending the useful lifespan of ceramic tools, and an arrangement for carrying out the method |
| 05/21/1987 | DE3540585A1 Skew rolling mill |
| 04/21/1987 | US4658617 Method permitting the increase of operations of cold pilger mills and an apparatus for the embodiment of this method |
| 04/07/1987 | US4655068 Floating cylindrical mandrel and method for producing tubing |
| 02/17/1987 | CA1217959A1 Apparatus for supporting the piercing mandrel back-up bar of a press-piercing rolling mill |
| 02/10/1987 | CA1217665A Apparatus for supporting the mandrel back-up bar of an axial piercing machine for hotworking billets, ingots and the like |
| 01/27/1987 | US4638655 Holding and guiding a mandrel rod in rolled stock in and adjacent to a tube rolling mill |
| 10/08/1986 | EP0197015A1 Floating cylindrical mandrel and method for producing tubing |
| 09/02/1986 | CA1210750A1 Separating-and-lubricating agent in solid form |
| 07/22/1986 | CA1208049A1 Mandrel-carrier head for a restrained-mandrel continuous rolling mill |
| 07/02/1986 | CA1206782A Restrained mandrel mil inlet table |
| 06/03/1986 | US4592222 Device for the delivery and removal of the mandrel rods in skew and longitudinal rolling mills |
| 04/29/1986 | US4585114 Apparatus for the lateral transfer of mandrels in a tube rolling mill |
| 03/11/1986 | US4575430 Separating-and-lubricating agent in solid form |
| 02/25/1986 | US4571970 Rolling mill plant for the manufacture of seamless tubes |
| 10/29/1985 | CA1195953A1 Holding fixture for a hollowing or expanding device onto a reaction bar |
| 10/09/1985 | EP0156922A1 Cross helical rolling mill for seamless steel tubes. |
| 07/17/1985 | EP0148806A1 Tube rolling method for the increase in performance of a cold pilger rolling mill, and device to carry out the method |
| 04/23/1985 | CA1185815A1 Mandrel rod holding device |
| 04/11/1985 | WO1985001458A1 Inclined rolling mill |
| 03/13/1985 | EP0133937A1 Process for descaling loops |
| 03/12/1985 | US4503698 Apparatus for supporting the piercing mandrel back-up bar of a press-piercing rolling mill |
| 02/12/1985 | US4498324 Restrained mandrel mill inlet table |
| 12/18/1984 | US4488421 Mandrel-carrier head for a restrained-mandrel continuous rolling mill |
| 12/11/1984 | US4487049 Working mandrel and method of rolling elongate hollow pieces in a multi-stand continuous mill on same working mandrel |
| 11/20/1984 | US4483638 Device for fixing a piercing or expanding plug to a piercing or expanding bar |
| 08/29/1984 | EP0116882A2 Separating and lubricating agent in solid form |
| 03/27/1984 | CA1164252A1 Rolling head support assembly for a rolling mill |
| 09/27/1983 | US4406143 Return pass practice for the high mill of a seamless-pipe mill |
| 08/02/1983 | US4395897 Rolling head support assembly for a rolling mill |
| 08/02/1983 | CA1150985A1 Mandrel restraining assembly for a tube-rolling mill |
| 07/19/1983 | US4393677 Plugs for use in piercing and elongating mills |
| 06/07/1983 | CA1147615A1 Plugs for use in piercing and elongating mills |
| 04/06/1983 | EP0076170A1 Lubricating mandrel bars |
| 01/18/1983 | US4368630 Mandrel exchange in piercing mills |
| 01/05/1983 | EP0069027A2 Device for fixing a pear-shaped piercing or expanding mandrel to a reaction bar |
| 12/29/1982 | EP0067906A2 Method for the production of seamless copper pipes |
| 11/30/1982 | US4361023 Mandrel-restraining assembly for a tube-rolling mill |
| 08/31/1982 | CA1130753A1 Apparatus for lifting a heavy load and transporting it over an obstruction |
| 07/13/1982 | CA1127430A1 Method and apparatus for rolling seamless tubes with a restrained mandrel |
| 04/27/1982 | US4326829 Apparatus for lifting a heavy load and transporting it over an obstruction |
| 03/30/1982 | CA1120752A1 Mandrel-holder for a pilger rolling mill |
| 03/09/1982 | US4318294 Method of manufacturing seamless metal pipes and tubes |
| 01/19/1982 | US4311032 Method and apparatus for rolling seamless tubes with a restrained mandrel |
| 12/16/1981 | EP0041907A1 Bench for retaining the mandrel in continuous rolling mills |
| 12/09/1981 | EP0041464A1 Slidable thrust bearing for rolling mills |
| 10/27/1981 | US4296622 Device for inserting and thrusting a bar into a press piercing _mill |
| 09/15/1981 | US4289012 Device for inserting and pushing a bar into a press-piercing mill |
| 08/25/1981 | US4285226 Mandrel-holder for a pilger rolling mill |
| 06/23/1981 | CA1103484A1 Device for inserting and thrusting a bar into a press piercing mill |
| 06/16/1981 | CA1103072A1 Device for inserting and pushing a bar into a press- piercing mill |
| 10/21/1980 | US4228939 Combined support and guide for the mandrel of a restrained mandrel continuous rolling mill |
| 06/10/1980 | CA1079097A1 Mandrel changing device for a piercing rolling mill |
| 05/06/1980 | US4201097 Device for locking and releasing the mandrel-holding carriage of a piercing pressure mill |
| 05/06/1980 | US4201070 Graphite lubricant application method |
| 02/05/1980 | US4186585 Device for controlling the speed of a mandrel in continuous retained-mandrel rolling mills |
| 12/25/1979 | CA1068520A Mandrel holding and releasing means |
| 11/13/1979 | US4173880 Cooled mandrel |
| 06/26/1979 | US4158954 Extraction device for continuous rolling mills using a retained mandrel |
| 04/17/1979 | US4149396 Mandrel holding and releasing means |
| 02/13/1979 | CA1048309A1 Continuous flow plug mill system |
| 01/02/1979 | US4132096 Coating mandrels in seamless pipe mill |
| 12/19/1978 | CA1044493A1 Plug and shoe changing in piercing and reeling mills |
| 12/05/1978 | US4127998 Mandrel changing device for a piercing rolling mill |
| 11/07/1978 | CA1041805A1 Hose reel for piercer and reeler outlet tables |
| 11/07/1978 | CA1041804A1 Plug changer for plug mill |
| 05/30/1978 | US4091650 Rolling mill for forming seamless tubes, and seamless tube-making apparatus comprising such a mill |
| 03/14/1978 | US4078412 Support shoes and methods of supporting metal members such as seamless tubes |
| 08/02/1977 | US4038854 Plug changer for plug mill |
| 07/26/1977 | US4037449 Continuous flow plug mill system |
| 07/12/1977 | US4034588 Methods of piercing and enlarging elongate metal members such as seamless tubes |
| 06/28/1977 | US4031738 Plug for plug rolling |
| 06/14/1977 | US4028923 Plug and shoe changing in piercing and reeling mills |
| 05/10/1977 | US4022047 Hose reel for piercer and reeler outlet tables |
| 05/10/1977 | US4022043 Plug changing mechanism for use in piercing mills |
| 04/05/1977 | US4015460 Rolling mill plug assembly |
| 11/09/1976 | US3990330 Method of producing seamless tube mill piercer mandrel |
| 08/24/1976 | US3975937 Method and apparatus for supplying plugs to plug mills |
| 06/15/1976 | US3962897 Metal working apparatus and methods of piercing |