| Patents for B21K 1 - Making machine elements (7,621) |
|---|
| 06/06/1991 | CA2020408A1 One-piece push rod having enlarged spherical seat |
| 06/04/1991 | US5020353 Method of machining an oblong workpiece and a machine for performing the method |
| 05/29/1991 | EP0429327A1 Manufacturing method and apparatus to produce a shell and telescopic articulated universal joint including that shell |
| 05/29/1991 | EP0232257B1 Process for the production of flanges or collars on hollow parts by lateral extrusion |
| 05/22/1991 | EP0428317A2 Method and apparatus for manufacturing an anchor bolt |
| 05/22/1991 | CN2077501U Inner-hexagon taper screw |
| 05/21/1991 | US5016461 Method and apparatus for stamping weld adapters |
| 05/21/1991 | US5016340 Method of manufacture of a rotor core member for a dynamoelectric machine |
| 05/07/1991 | US5013281 Monobloc hub, particularly for an automotive vehicle |
| 05/07/1991 | CA1283774C Piston ring manufacturing method |
| 04/18/1991 | DE3933960A1 Lifting prong for fork lift truck - has blade section varying from tip to achieve uniform bending resistance |
| 04/10/1991 | EP0421144A2 Expanding tool |
| 04/10/1991 | EP0421143A2 Expanding tool for a shaping device |
| 03/27/1991 | EP0418838A2 A metal mold for plastic working a differential pinion and a method for plastic working with the metal mold |
| 03/26/1991 | US5001920 Method and apparatus for manufacturing a constant velocity joint and the like |
| 03/20/1991 | CA2025686A1 Differential pinion, metal mold for plastic working the same, and method for plastic working with the metal mold |
| 03/13/1991 | CN2072875U Working apparatus of aluminum granular |
| 03/13/1991 | CN1049811A Production method of sleeper bolt and its die |
| 03/12/1991 | US4998853 Self-drilling blind rivet and method for making same |
| 03/12/1991 | US4998344 Method of manufacturing a hub |
| 03/07/1991 | DE4027885A1 Synchroniser for switch couplings - has conical hole with wear resistant hole and friction lining in cone, with conical punch |
| 03/06/1991 | EP0414973A1 A die set for forging knife-edge of tapping screw |
| 03/06/1991 | EP0414670A1 A tool ring, a method of making it, and a holding tool for use in the performance of the method. |
| 03/05/1991 | US4996860 Method and apparatus for manufacturing anchor bolts for concrete |
| 02/12/1991 | US4991421 Method for extruding an elongated, lightweight rack |
| 02/12/1991 | CA1280106C Method of manufacture of manifolds and manifold provided by such method |
| 01/29/1991 | US4988247 Blind rivet and method of making same |
| 01/23/1991 | CN1011297B Manufacturing method of bicycle flywheel |
| 01/16/1991 | EP0270538B1 Tool for and method of making hollow articles |
| 01/10/1991 | CA2009649A1 Dual-alloy disk system |
| 01/09/1991 | CN1011122B Method for producing ring gears for heavy-duty drive axles |
| 01/08/1991 | US4982596 Die for manufacturing a fastener blank |
| 01/08/1991 | US4982592 Method of extruding channeled sleeves |
| 12/19/1990 | CN1010838B Method for producing near net ring gear forgings |
| 12/13/1990 | DE3919127A1 Die forging process for spiral bevel gears - uses modified tooth geometry to allow simple extraction of gear forging from one-piece die |
| 12/12/1990 | CN1047698A Cold molding reiforing process for low-carbon manganese niobium steel fastening parts |
| 11/22/1990 | EP0398512A2 Blind rivet |
| 11/22/1990 | DE3915969A1 Forging unit for gear wheels - has blank forged in toothed stamping die by longitudinal introduction of at least one press |
| 11/14/1990 | CN1046865A Automobile transmission shaft universal-joint fork squeezing die forming technology and die set |
| 11/06/1990 | US4967586 Upsetting press for upsetting or swaging wire segments of predetermined lengths into balls or the like |
| 11/06/1990 | US4967584 Method of making a forging in closed-dies |
| 10/17/1990 | CN1046108A Device for machining internal thread tube piece |
| 10/09/1990 | US4961353 Gear structure |
| 09/27/1990 | DE3930825A1 Kugelkonstruktion eines kugelgelenks und verfahren zu dessen herstellung Ball of a ball joint construction and method of producing the |
| 09/25/1990 | US4958971 Break-stem blind rivet |
| 09/25/1990 | CA1274410A1 Fastener |
| 09/12/1990 | CN2061877U High speed shaping machine for drill tail |
| 09/11/1990 | US4955133 Method of making pulleys with plural V-shaped grooves |
| 09/05/1990 | CN1045047A Process for cold stamping shaping steel thumb nut |
| 08/22/1990 | EP0382773A1 A method of machining an oblong workpiece and a machine for performing the method. |
| 08/08/1990 | EP0381556A1 Tubular pin with internal bulges, and process for making the same |
| 08/07/1990 | CA1272371A1 Tool for and method of making hollow articles |
| 08/01/1990 | EP0380005A1 Self-drilling blind rivet and method of making same |
| 08/01/1990 | CN1008976B Rolled forging formating technology for front axle of automobile |
| 07/31/1990 | CA1272006A1 Method and apparatus for making screws having a drill section and a reamer section |
| 07/26/1990 | DE4001723A1 Self drilling blind rivet - is made from cylinder blank with main body and bore |
| 07/25/1990 | CA2007523A1 Self-drilling blind rivet and method for making same |
| 07/17/1990 | US4941341 Process and apparatus for cold pressing a conical external thread |
| 07/17/1990 | US4941339 Tool bits and method of shaping |
| 07/12/1990 | DE3900186A1 Method for making a piston pin |
| 07/10/1990 | US4939829 Method of and apparatus for manufacturing a gear |
| 07/05/1990 | DE3843772A1 Method for the production of threads in drawn holes in sheet metal |
| 07/03/1990 | US4938089 Forged gear for a transmission |
| 06/28/1990 | DE3842979A1 Method for the production of a short-shank head part |
| 06/26/1990 | US4936133 Method for manufacturing an element having grooved trunnions and forming method for grooving the trunnions |
| 06/26/1990 | US4936131 Production of threaded metal rods for making U-bolts |
| 06/13/1990 | CN1008346B Brazing process for bicycle frame |
| 06/12/1990 | US4932234 Method of forming tappet adjusting screws |
| 06/05/1990 | CA1270047A1 Method and apparatus for controlling the concentration of a chemical solution |
| 05/31/1990 | WO1990002479A3 Dual-alloy disk system |
| 05/29/1990 | US4928375 Method of forming a hollow fastener from sheet metal |
| 05/22/1990 | US4926534 Method for manufacturing a poppet valve head |
| 05/15/1990 | US4924690 Method and apparatus for plastically forming helical internal gears and helical gears |
| 05/10/1990 | DE3837799A1 Method of manufacturing a freewheel for bicycles |
| 05/08/1990 | US4922738 Process for manufacturing a single piece alloy wheel rim for vehicle tires |
| 05/02/1990 | EP0366023A1 Linear ball sleeve |
| 05/01/1990 | CA1268323A1 Manufacture of metal articles from wire |
| 04/24/1990 | US4918970 Fully enclosed die forging apparatus |
| 04/24/1990 | US4918969 Forging method for a hollow article |
| 04/24/1990 | US4918967 Fully enclosed die forging apparatus |
| 04/19/1990 | WO1990004096A1 Electromagnetic fuel injector and method for producing the same |
| 04/17/1990 | US4916801 Method of forming a stem with a groove and a snap ring |
| 04/10/1990 | US4914938 Fully enclosed die forging apparatus |
| 04/04/1990 | EP0222855B1 Method for fabricating a hose adapter for threaded or nested nipples subjected to hydraulic loads |
| 04/03/1990 | US4913689 Pulley with a high-friction groove surface and manufacturing method therefor |
| 03/22/1990 | WO1990002479A2 Dual-alloy disk system |
| 03/21/1990 | EP0359386A2 Method and apparatus for press-forming intricate metallic shapes such as spool valve elements |
| 03/21/1990 | EP0358784A1 Apparatus for manufacturing a constant velocity joint |
| 03/21/1990 | EP0243463B1 Lock nut and method for making same |
| 03/20/1990 | US4910093 Piston blank for a forged piston |
| 03/06/1990 | US4905361 Method for manufacturing pulley with a high-friction groove surface |
| 03/01/1990 | DE3828446A1 Method of manufacturing self-tapping screws having a drill point |
| 02/28/1990 | EP0356375A2 Method of cold pressing a conical exterior screw thread |
| 02/28/1990 | EP0356118A2 Old extrusion process for internal helical gear teeth |
| 02/27/1990 | US4904145 Stud with an adapted head |
| 02/21/1990 | CN1006860B Forging process |
| 02/20/1990 | US4901556 Loading a segmented die and ejecting a component formed therein |
| 02/14/1990 | EP0354682A2 Cold extrusion process for internal gear teeth |
| 02/07/1990 | EP0353231A1 Process and apparatus for forging one piece track roller rim. |
| 01/31/1990 | EP0352518A2 Method of manufacturing a single-piece valve sleeve |