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| Number | Title | Issue Date |
| 7334446 | Method for producing a striplike pre-material made of metal, especially a pre-material which has been profiled into regularly reoccurring sections, and device therefor This invention describes both a method and apparatus to practice a method which produces a strip-like pre-material from metal using rollers which have a roll gap in which the metal strip is discontinuously rolled in successively steps between the same two rollers wi... | 02/26/2008 |
| 6082990 | Stent crimping tool A stent crimping tool for firmly and uniformly crimping a stent onto a balloon catheter. The stent crimping tool is constructed of three orthogonally arranged semi-circular shaped cams rotatably mounted on a common base. Two cams are disposed horizontally... | 07/04/2000 |
| 6000267 | Process for fabrication of rack shaft and fabrication machine therefor A steel pipe having a circular sectional form is retained by a retainer. A rotatable first roller is pressed against an intermediate portion of the steel pipe. In this state, a pusher causes the steel pipe to move axially of the steel pipe. This causes th... | 12/14/1999 |
| 5979205 | Ring manufacturing method and ring manufacturing apparatus A ring manufacturing method and a ring manufacturing apparatus according to the invention does not require the preparation of a specially shaped plate material for each type of ring plate to be manufactured. It is therefore possible to manufacture a ring ... | 11/09/1999 |
| 5315854 | Tube tapering apparatus having a variable orifice die An apparatus for tapering a tube having a frame, a tube receiving end connected to the frame, a variable-orifice die arranged so as to be movable relative to the frames, and an axial tension cylinder connected to the tube receiving end so as to apply tens... | 05/31/1994 |
| 4962658 | Method and apparatus for straight drawing a pipe Pipes are straight drawn for reducing the pipe diameter and the pipe wall thickness. The drawing is performed intermittently through a plurality of drawing stages, each including a drawing plate having a drawing nozzle or opening through which the pipe mu... | 10/16/1990 |
| 4941339 | Tool bits and method of shaping Grooves are formed in an insertion end of a working tool, such as a tool bit or a chisel bit by pivoting a grooving tool about a pivot axis extending perpendicularly to the axis of the insertion end. By pivoting the grooving tool about the pivot axis, it ... | 07/17/1990 |
| 4651551 | Means for manufacturing components of rotary valves A die head for a roll imprinting machine for the imprinting of edges of grooves performed in a valve core for a rotary valve for use in a power steering gear, the die head supporting a circular cluster of radially disposed rolling die holders, each die ho... | 03/24/1987 |
| 4538440 | Roll swage device Device for swaging a loose fitting onto a core. The device has at least two opposed coplaner swaging tools each rotatable about a fixed axis and together forming a swaging station. Pusher means are provided for pushing the fitting through the swaging stat... | 09/03/1985 |
| 4441351 | Method of and apparatus for producing metallic tape A method of producing a continuous metallic tape from a metallic material wire by rolling. A wire having any desired cross-sectional shape is fed into the gap between a pair of rolls in a direction parallel to the axes of the rolls. The rolls are adapted ... | 04/10/1984 |
| 4409812 | Method of and apparatus for producing metallic tape A method of producing a continuous metallic tape from a metallic material wire by rolling. A wire having any desired cross-sectional shape is fed into the gap between a pair of rolls in a direction parallel to the axes of the rolls. The rolls are adapted ... | 10/18/1983 |
| 4316377 | Roll forging machine A roll forging machine has a pair of opposed work rolls carrying cooperating dies and a pair of support rails mounted on each work roll on opposite sides of the die thereon. The support rails provide the work rolls with a high spring constant, so that the... | 02/23/1982 |
| 4214468 | Hot rolling pilger mill The feeder and the rolls are operated by separate cranks to avoid obstruction of the area in which the hollows are connected to the feeder. The two cranks are either separately driven or connected to a common drive; in either case, synchronism is maintain... | 07/29/1980 |
| 4213320 | Roll-forging mill A roll-forging mill comprises a roll stand with working tools adapted to perform oscillating movement by means of bars articulated on a support stand. The support stand is mounted for movement on stationary guides along the passline and is actuated by pow... | 07/22/1980 |
| 4157025 | Method and mill for rolling metal billets A method of rolling metal billets in a single pass comprises the steps of reducing a billet by workrolls and alternating each reduction cycle of the billet being worked with axial feed thereof through a step of rolling. As the billet is worked by the work... | 06/05/1979 |
| 4152917 | Hot rolling pilger mill The pilger rolls are driven through gear segments which are reciprocated by a crank and linkage which also reciprocates the feed mechanism; that mechanism includes a carriage and a mandrel holder in a feed slide on the carriage, the mandrel holder may als... | 05/08/1979 |
| 4100785 | Method and apparatus for manufacturing valve components A valve core for co-operation with a hydraulic valve sleeve, wherein the core is provided with a plurality of longitudinally extending grooves constructed for co-operation with mating radially inwardly facing grooves in the valve sleeve, wherein the groov... | 07/18/1978 |
| 3948070 | Motion control for the feed mechanism in pilger rolling mills The feed mechanism for a pilger or Mannesmann rolling mill is driven by an electrical linear motor which is controlled on the basis of two pulse trains. One train is derived from the rolls, the other one from the reciprocating motor. The control is carrie... | 04/06/1976 |
| 3943617 | Novel apparatus and solid state method for converting small pieces of metal to a workpiece A method of converting scrap or other small pieces of metal into a useful, commercial product while maintaining the metal in a solid state. According to the process, the pieces are maintained together for further processing. They are impacted, while heate... | 03/16/1976 |
