Patents
Sitemap › B21 - Mechanical metal-working without essentially removing material; Punching metal › B21D - Working or processing of sheet metal or metal tubes, rods or profiles without essentially removing material; Punching › B21D 41 - Application of procedures in order to alter the diameter of tube ends
Patents for B21D 41 - Application of procedures in order to alter the diameter of tube ends (2,982)
08/1992
08/13/1992CA2061060A1 Flaring tool for hollow workpieces
08/04/1992US5134872 Tube end expander device
07/1992
07/29/1992CN2111151U Two-purpose bushing pipe unit
04/1992
04/14/1992US5104031 Distributor tube end former
03/1992
03/24/1992US5097690 Flange repair tool
03/17/1992US5095733 Maintaining a preferred vibration mode in an annular article
03/04/1992EP0472685A1 Process for joining a pipe to the outer wall of a second pipe
03/03/1992US5092152 Crimping machine
02/1992
02/25/1992US5090230 Pipe expanding pliers
02/25/1992US5090226 Motor driven flaring device
02/25/1992CA1296168C Apparatus for gripping tubes in multirow plate fin coils
02/04/1992US5085131 Hydraulic cylinder for automotive steering systems and the like
12/1991
12/27/1991EP0462719A2 Conductor guide forming machine
12/24/1991CA1293430C Tube expanders
10/1991
10/15/1991US5056210 Method of radially flaring a resilient pipe liner
09/1991
09/25/1991EP0448304A2 Motor driven flaring device
09/16/1991WO1991013708A1 Pipe notching process
09/16/1991CA2057910A1 Pipe notching process
09/10/1991US5046349 Expansion tool for hollow working parts
08/1991
08/21/1991CN1013556B Method and apparatus for ensuring dimensional accuracy of frusta-pyramidal can body
07/1991
07/23/1991US5033301 Coupling for a gas pipe joint and associated method for making same and device therefor
07/17/1991CN1053025A Cold press mounting for rotary parts and moulds thereof
06/1991
06/19/1991EP0432485A2 Process and apparatus for the production of light alloy tubing of larger diameter starting from tubing of smaller diameter
05/1991
05/29/1991CN2077765U Binding machine
05/15/1991CN1051317A Formation method for reducing guide pipe
05/14/1991US5014779 Device for expanding pipes
05/07/1991US5012649 Power actuator
04/1991
04/09/1991CA1282646C Apparatus for crimping pipe
03/1991
03/28/1991DE3930710A1 Expanding tool for hollow, cylindrical workpieces
03/20/1991EP0417674A1 Expander tool for hollow workpieces
03/15/1991CA2024394A1 Expansion tool for hollow working parts
03/07/1991WO1991002606A1 A tool in kit form for forming conduit ends
02/1991
02/26/1991US4995254 Method and apparatus for ensuring the dimensional accuracy of a frusto-pyramidal can body
02/19/1991US4993145 Apparatus for gripping tubes in multirow plate fin coils
01/1991
01/29/1991US4987763 Tool in kit form for deforming metal
01/09/1991CN1048340A Process of glazing a layer of plastic on inner wall of metal pipes
12/1990
12/12/1990EP0402175A1 Method of and apparatus for forming the end of a flat metal tube, and closing and sealing the end thereof
11/1990
11/22/1990EP0397875A1 Pipe roller-expanding device
11/14/1990EP0397570A1 Tube end enlarging or expanding tool
11/01/1990WO1990012665A1 Pipe expander
10/1990
10/03/1990EP0390355A1 Maintaining a preferred vibration mode in an annular article
09/1990
09/28/1990CA2012930A1 Maintaining a preferred vibration mode in an annular article
09/05/1990CN1045046A Melthod and apparatus for ensuring dimensional accuracy of frusto-phramidal can body
08/1990
08/22/1990EP0383052A1 Method and device for ensuring the dimensional accuracy of a truncated pyramid-shaped can body
08/22/1990EP0382847A1 Power drive
08/16/1990CA2009415A1 Method and apparatus for ensuring the dimensional accuracy of a frusto-pyramidal can body
07/1990
07/26/1990DE3918800C1 Tube ends forming device - has tool head in form of pyramidal polygon, carrying movable segments
06/1990
06/19/1990US4934171 Hose coupling member repair tool
06/19/1990US4934038 Method and apparatus for tube expansion
06/06/1990CN1042673A Pipe-end straightening method and device for large-bore steel pipe
06/05/1990US4930331 Apparatus and method for fabricating elliptical tubing
05/1990
05/31/1990WO1990005831A1 Pipe roller-expanding device
04/1990
04/10/1990CA1267599A1 Pipe expander
04/04/1990EP0361133A1 Method and device for sealing the end of a conduit
03/1990
03/27/1990US4910991 Tube end double end forming method and apparatus
03/06/1990US4905492 Method and device for forming a transverse collar on the end of a metal pipe
02/1990
02/13/1990US4899571 Apparatus for drawing-in a pipe end by cold forming
02/08/1990WO1990001116A1 Power drive
02/08/1990DE3826187A1 Expansion tool for hollow workpieces
01/1990
01/03/1990EP0349521A2 Forming apparatus for hollow articles
01/02/1990US4890472 Flaring tool for hollow workpieces
12/1989
12/07/1989DE3818173A1 Method and apparatus for inward flanging
08/1989
08/23/1989CN2043144U Closing machine for steel cylinder
08/22/1989US4859408 Method and apparatus for securing structural tubes in nuclear reactor fuel assemblies
08/22/1989US4858305 Single station tension hairpin tube expander
08/03/1989DE3802807A1 Method for closing a filling connection
07/1989
07/04/1989US4843860 For creating a bell
05/1989
05/23/1989US4831855 Flaring tool and apparatus equipped with a flaring tool
05/09/1989US4827754 Squeezing and chamfering device for tube end
04/1989
04/20/1989DE3733990A1 Expansion tool for ends of thin-walled sheet-metal tubes
04/05/1989EP0309699A2 Enlarging device for hollow work pieces
04/04/1989CA1252029A1 Tube expanding tool
03/1989
03/21/1989US4813260 Multipurpose tube working tool
01/1989
01/25/1989EP0300318A1 Apparatus for cold swaging a pipe end
01/18/1989EP0299714A2 Process and apparatus for forming flanged ends on tubular workpieces
01/04/1989EP0298017A2 Radial press
01/04/1989CN1030036A Hot-working method for changing the inner and outer diameters of seamless seamless steel pipe
12/1988
12/13/1988US4790168 Pipe crimping and cutting
12/06/1988CA1245974A1 Method and means for securing bubble caps to riser tubes
11/1988
11/30/1988CN88202098U Combined pipe riveting and cutting device
10/1988
10/25/1988US4779441 Tube having a flared end
10/11/1988US4776196 Process and apparatus for forming flanged ends on tubular workpieces
10/05/1988EP0284773A2 Apparatus for enlarging tube ends
10/04/1988US4774828 Radial press
08/1988
08/30/1988US4766667 Apparatus for tension expanding tubes
08/09/1988US4761866 Method of working in situ the end of a heat exchanger tube
08/03/1988CN87105921A Bottomed cylinder mouth-contracting method and apparatus
07/1988
07/06/1988CN87212403U Pipe-reducing apparatus with bottom barrel
06/1988
06/28/1988US4753101 Apparatus and method for expanding and shaping tubular conduits
06/21/1988US4751839 Method for removing certain of the corrugations in a helically corrugated pipe
06/21/1988US4751836 Pipe end conditioner and method
06/09/1988DE3640690A1 Pipe with a widened, reinforced end, and apparatus for its production
05/1988
05/24/1988US4745678 Apparatus for belling and expanding coils
05/24/1988CA1237083A1 Muffler apparatus and method for making same
05/19/1988DE3637292A1 Expansion tool
05/11/1988EP0266671A2 Expanding tool and expanding device
04/1988
04/27/1988EP0264806A2 Apparatus for crimping pipe
04/05/1988US4735078 Tube expanding tool
03/1988
03/30/1988EP0261294A2 Method for sealing metal tubes
03/29/1988US4733551 Pipe expander
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