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Class 72/343 - BY USE OF CLOSED-DIE AND COACTING WORK-FORCER (E.G., PUSH-DRAWING)


Subclass of Class 72 - Metal deforming
Definition: Subject matter comprising the use of a movable member and
No. of patents: 27
Last issue date: 06/08/2010


NumberTitleIssue Date
7730755Process of producing permanent magnet and permanent magnet
The present invention relates to a process of producing a permanent magnet, which includes extruding a preform to form a plate-shaped permanent magnet, in which the preform is extruded in such a way that a dimension of a cross section of the preform is reduced in an...
06/08/2010
7347076Forging method and apparatus for forming helical gear
Disclosed herein are a helical gear forging apparatus wherein a forming introduction portion thereof, used to form gear teeth of the helical gear, is variable in shape on the basis of the desired helix angle of the gear-teeth so as to constantly keep a predetermined...
03/25/2008
7325434Method for manufacturing ring-shaped magnet material and manufacturing apparatus used therefor
A method for manufacturing a ring-shaped magnet includes arranging, in a penetrating hole formed in a die, a mandrel having a cylinder tip portion of a diameter d1, a cylinder base end portion of a diameter d2, provided d1
02/05/2008
7322094Method for manufacturing a head stack assembly
A head stack assembly of a disk drive unit including a head arm assembly (HAA) having a head gimbal assembly, a drive arm to be connected with the head gimbal assembly; wherein the drive arm comprises a securing portion, a connection portion and a spacer connecting ...
01/29/2008
7150172Burring device
A burring device is provided which can efficiently perform continuous burring. The burring device has a work holder which has a burring hole and which holds a work object, a pusher rod which rotatably supports the base end of a metal core which has a processing part...
12/19/2006
7047787Method of forming spline and keyway for sheet metal rotating member with boss part
An annular excess portion is disposed, a spline forming male mold is passed through a boss of a sheet metal-made rotary member in which a root portion of the boss and a peripheral portion are previously displaced, and the boss is set to a stationary mold with being ...
05/23/2006
7025929Method and apparatus for densifying powder metal gears
The invention provides a method and apparatus for densifying the teeth of a powder metal preform gear. The die includes an aperture for receiving a body of the gear and a plurality of grooves for receiving the teeth of the gear. The grooves have a length and a varia...
04/11/2006
6546778Tool for removing damaged fasteners and method for making such tool
A tool for removing damaged fasteners and a method for making such tool wherein the tool (10) includes a first end (12) and a second end (14) with an outside surface (32) and an inside surface (40) defined between ends (12) and (14). A portion (46) of ins...
04/15/2003
6322717Method of processing leather material, leather material thus processed and leather product using leather material thus process
A processing method of a leather material having grains thereon is disclosed. The processing method of the leather material includes: the first step of sammying a tanned leather material by hand; the second step of moistening the leather material; and thi...
11/27/2001
6168754Method and apparatus for densifying powder metal preforms
A multi-stage forming tool for densifying the outer perimeter of post-sintered powder metal preforms includes a series of axially spaced die plates having different sized die openings arranged from largest to smallest. An oversized powder metal preform it...
01/02/2001
6089070Method of manufacturing a metal wood golf club head
This invention relates to an improved golf club head and an improved method of manufacturing of a golf club head. More particularly, the invention relates to an improved metal wood golf club head and improved method of manufacturing a metal wood golf club...
07/18/2000
6071360Controlled strain rate forming of thick titanium plate
Thick plate is difficult to form because it cracks when localized strain exceeds the limits of the material. Forming thick titanium would significantly reduce manufacturing costs for finished parts by reducing machining time and by allowing standard stock...
06/06/2000
5544548Cold forming method of toothed ring-shaped products and forming apparatus for its use
A cold forming method for plastic deformation process of toothed ring-shaped products (W0) have a tooth profile portion (T) in at least one of the outer peripheral surface and inner peripheral surface thereof. When processing a ring-shaped product (W0) ha...
08/13/1996
5464652Green ceramic via metallization technique
The present invention provides a method for metallizing vias in co-fired ceramic green tape. A vacuum operated pick and place anvil comprising a porous block is used to pick up conductor balls from a bed. Air pressure is used to create a vacuum which pull...
11/07/1995
5408857Method and apparatus for extrusion of gears
A method is disclosed for forming helical or spur gears. The method comprises providing a die having a toothed region, positioning a first blank in the toothed region of the die, inserting second and third blanks adjacent the first blank, and applying a f...
04/25/1995
5295382Cold extrusion of externally toothed helical members
An internally toothed die which has the entire root to pitch diameter of its die tooth tip material removed in the transition zone between the land area and the trailing relieved portion; this essentially redistributes the extrusion bending forces without...
03/22/1994
4924690Method and apparatus for plastically forming helical internal gears and helical gears
The present invention is to extrude helical internal gears and helical gears by pushing materials processed to any type of blank into a die unit successively by use of a punch, i.e., by passing the materials once through the die unit. The invention is dir...
05/15/1990
4773248Process for manufacturing a part having a tooth profile and boss
The present invention relates to a process for the manufacture of parts having a tooth profile and boss by means of a press machine. The process of the present invention comprises a blank with a boss, which is produced in a prior operation by machining, c...
09/27/1988
4653305Apparatus for forming metallic article by cold extrusion
A method and apparatus for cold working a metallic blank having a central hole into a substantially annular or cylindrical article such as an internally and or externally toothed gear, with the method including forcibly inserting a hollow metallic blank a...
03/31/1987
4509353Method of and apparatus for forming gears
Gears are formed from annular blanks in a gear-forming apparatus including a die block formed with an axial bore and teeth radially projecting into the bore, a cylindrical punch sleeve axially movable toward and away from the bore in the die block, a mand...
04/09/1985
4479296Method of manufacturing a rubber shoe sole
This invention reveals a method of manufacturing a rubber shoe sole having a decorative metal piece incorporated therein comprising molding a metal slug to comply to the shape of a fenced area in a shoe mold while simultaneously shaping and vulcanizing a ...
10/30/1984
4454745Process for cold-forming a tube having a thick-walled end portion
A tube with a thick walled portion at one end is cold-formed by necking one end of a tube workpiece, inserting a mandrel which engages within the tapering neck of the necked portion, drawing the necked workpiece through a drawing die by applying pressure ...
06/19/1984
4372143Apparatus for forming a domed bottom in a can body
An apparatus for forming an inward dome in the bottom wall of a metal can body having a beveled peripheral edge bordering the bottom wall. The apparatus includes a housing which supports a convex die member adapted to engage the bottom wall of the can bod...
02/08/1983
4368632Apparatus for reducing the cross sectional area of a wire
Apparatus for reducing the cross sectional area of a wire comprises stabilizing means arranged to receive the wire and to limit extrusion thereof in a direction transverse to its length and movable projecting means for engaging the wire while restrained b...
01/18/1983
4308745Hydraulic press
A horizontal hydraulic press comprises stationary plates, mounted on a bed and linked with columns upon which two slides can move. The slides are moved by double-acting hydraulic cylinders. In a similar way, between said slides there is installed an inter...
01/05/1982
4151734Process for manufacturing welding necks and the like
A far less expensive process of manufacturing heavy-duty welding necks, nozzles, and similar connector elements comprising cylindrical bodies with a radial flange at one end, is provided through the utilization of a centered metal-displacement disc which ...
05/01/1979
4078413Apparatus for producing fibers from heat-softenable materials
A stream feeder for supply of streams of molten glass for attenuation into fibers. The feeder is formed of metal and is electric-resistance heated. The bottom wall and sidewalls of the feeder are of varied thickness and are formed from a single sheet of m...
03/14/1978
 
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