| Patent Number |
Title Of Patent |
Date Issued |
| 7337531 |
Die assembly and method for manufacturing lamina stacks from a plurality of separate strips of s |
March 4, 2008 |
| A progressive die assembly and a method for manufacturing lamina stacks from a plurality of separate strips of stock material. The die assembly includes a plurality of feed pathways for the material strips, each feed pathway having an associated punch set. Each punch set includes one or |
| 7062841 |
Method of manufacturing a formable laminated stack in a progressive die assembly having a choke |
June 20, 2006 |
| A method of manufacturing a stack of interlocked laminations in a progressive die assembly having a choke. A strip of sheet stock material is provided and a plurality of laminations are stamped therein. Each of the laminations include at least one interlock feature and include first |
| 6984913 |
Lamination stack with center interlock |
January 10, 2006 |
| An interlocked stack of laminations for rotors wherein each lamination includes a centrally located, circular indentation. The indentation provides corresponding projections and depressions in the laminas which may be interlocked by engagement of a projection in one lamina with an ad |
| 6877214 |
Method of manufacturing a stack of laminations |
April 12, 2005 |
| A method of manufacturing a stack of interlock laminations and thereby shaping the stack of laminations into a desired shape. Each of the individual laminations is formed by a series of punching operations from sheet stock material. The laminations are blanked from the stock material, |
| 6745458 |
Laminated magnetic core and method for making |
June 8, 2004 |
| A method of manufacturing an elongate stack of interlocked laminae in a die assembly. The method includes the steps of stamping a first lamina having generally opposed first and second edges in the strip stock material, stamping at least one first interlock means for engaging another lam |
| 6742239 |
Progressive stamping die assembly having transversely movable die station and method of manufact |
June 1, 2004 |
| A progressive stamping die assembly apparatus and method in which strip stock material advances in a first direction through the apparatus and substantially simultaneously with the strip stock movement, a transversely moveable die station moves in opposite second and third directions |
| 6725756 |
Two-piece metal punch construction |
April 27, 2004 |
| An apparatus for providing an improved two-piece punch construction. The two-piece punch construction includes a supporting member and a punch body. The supporting member includes an aperture in which the punch body is accurately located. The supporting member further includes a supporti |
| 6636137 |
Ignition coil assembly |
October 21, 2003 |
| An ignition coil assembly having an inner core element formed from an interlocked stack of elongate laminae plates. Each of the laminae plates has a substantially common length and a substantially uniform width along the length thereof, with the length of each laminae plates being greate |
| 6530142 |
Dual action indexing system and method for a die assembly |
March 11, 2003 |
| An indexing system for a die assembly for manufacturing a stack of laminae from sheet stock material in a punch press, the stack having a desired stack height and a skew angle, the stock material having a nominal thickness. The indexing system includes indexing means for producing a |
| 6484387 |
Progressive stamping die assembly having transversely movable die station and method of manufact |
November 26, 2002 |
| A progressive stamping die assembly apparatus and method in which strip stock material advances in a first direction through the apparatus and substantially simultaneously with the strip stock movement, a transversely moveable die station moves in opposite second and third directions |
| 6237214 |
Apparatus for manufacturing laminated parts with center interlock |
May 29, 2001 |
| Progressive die assembly for forming a centrally interlocked stack of laminations for rotors, the stack of laminations having a central stack axis. The die assembly includes a punch which forms a centrally located, circular indentation in each lamination, the indentations each having a |
| 6195875 |
Apparatus for manufacturing long, slender lamina stacks from nonuniform laminae |
March 6, 2001 |
| A method of manufacturing an elongate stack of interlocked laminae in a die assembly. The method includes the steps of stamping a first lamina having generally opposed first and second edges in the strip stock material, stamping at least one first interlock means for engaging another lam |
| 6192575 |
Dual action indexing system and method for a die assembly |
February 27, 2001 |
| A dual action indexing system and method for relatively rotating a lamina and a partial lamina stack in a progressive die assembly. The dual action indexing system includes a mechanical indexer which provides a large indexed rotational movement to correct for thickness inconsistencies in |
| 6163949 |
Method for manufacturing long, slender lamina stack from nonuniform laminae |
December 26, 2000 |
| A method of manufacturing an elongate stack of interlocked laminae in a die assembly. The method includes the steps of stamping a first lamina having generally opposed first and second edges in the strip stock material, stamping at least one first interlock means for engaging another lam |
| 6131268 |
Method for manufacturing a lamina stack having at least two differently shaped lamina layers |
October 17, 2000 |
| A laminated stack having a lamina layer comprised of a plurality of discrete lamina segments and which may also have laminas which define a plurality of outer perimeter configurations. The invention provides a method and apparatus for manufacturing such stacks. Lamina layers comprisi |
| 6000119 |
Lamina stack having a plurality of outer perimeter configurations and an apparatus and method fo |
December 14, 1999 |
| A method and apparatus for manufacturing a lamina stack having laminas with a plurality of outer perimeter configurations. Each of the outer perimeter configurations has at least one common choke surface. The common choke surfaces form, when the laminas are stacked, a choke contacting su |
| 5960533 |
Apparatus for manufacture of laminated parts |
October 5, 1999 |
| Elongated thin strip stock is blanked to form interlocking laminas for electric motor or generator rotors or stators at successive blanking stations. At a final assembly station the laminas are stacked and pressed into interlocking relationship. In response to an operator input a pre |
| 5918359 |
Apparatus for manufacturing an interlocked core spaced for anneal penetration |
July 6, 1999 |
| A process and apparatus for manufacturing lamina stacks used to form rotor or stator cores for electric motors. In the process of forming a plurality of blanked lamina, a blanking and tacking machine forms dimples in the laminas prior to coaxially stacking the laminas. The lamina may als |
| 5881450 |
Dual action indexing system and method for a die assembly |
March 16, 1999 |
| A dual action indexing system and method for relatively rotating a lamina and a partial lamina stack in a progressive die assembly. The dual action indexing system includes a mechanical indexer such as a roller gear cam which provides a large indexed rotational movement to correct for |
| 5809638 |
Method for manufacturing laminated parts with center interlock |
September 22, 1998 |
| The present invention involves a method and apparatus for forming a centrally interlocked stack of laminations for rotors. A centrally located, circular indentation is formed in each lamination. The indentation provides corresponding projections and depressions in the laminas which m |
| 5755023 |
Lamina stack with at least one lamina layer having a plurality of discrete segments and an appar |
May 26, 1998 |
| A laminated stack having a lamina layer comprised of a plurality of discrete lamina segments and which may also have laminas which define a plurality of outer perimeter configurations. The invention provides a method and apparatus for manufacturing such stacks. Lamina layers comprisi |
| 5604678 |
Controller for a progressive die assembly for the manufacture of limited parts |
February 18, 1997 |
| Elongated thin strip stock is blanked to form interlocking laminas for electric motor or generator rotors or stators at successive blanking stations. At a final assembly station the laminas are stacked and pressed into interlocking relationship. In response to an operator input a pre |
| 5550327 |
Coreweighing system for closed-loop stock gauging control |
August 27, 1996 |
| A core conveyor system for electric motor manufacturing apparatus, including a core weighing station for improving the accuracy of stock measurement in manufacturing electric motor stator and rotor laminated stacks or cores from sheet stock. Stock is initially measured to determine a |
| 5377115 |
Controller for a progressive die assembly for the manufacture of laminated parts |
December 27, 1994 |
| Elongated thin strip stock is blanked to form interlocking laminas for electric motor or generator rotors or stators at successive blanking stations. At a final assembly station the laminas are stacked and pressed into interlocking relationship. In response to an operator input a pre |
| 5373622 |
Apparatus and method for manufacturing laminated parts |
December 20, 1994 |
| Elongated thin strip stock is blanked to form interlocking laminas for electric motor or generator rotors or stators at successive blanking stations. At a final assembly station the laminas are stacked and pressed into interlocking relationship. In response to an operator input a pre |
| 5365021 |
Coreweighing system for closed-loop stock gauging control |
November 15, 1994 |
| A core conveyor system for electric motor manufacturing apparatus, including a core weighing station for improving the accuracy of stock measurement in manufacturing electric motor stator and rotor laminated stacks or cores from sheet stock. Stock is initially measured to determine a |
| 5359763 |
Progressive die assembly apparatus with rotation and interlock for the manufacture of laminated |
November 1, 1994 |
| Elongated thin strip stock is blanked to form interlocking laminas for electric motor or generator rotors or stators at successive blanking stations. At a final assembly station the laminas are stacked and pressed into interlocking relationship. In response to an operator input a pre |
| 5349741 |
Method of making an interlocked core spaced for anneal penetration |
September 27, 1994 |
| A process and apparatus for manufacturing lamina stacks used to form rotor or stator cores for electric motors. In the process of forming a plurality of blanked lamina, a blanking and stacking machine forms dimples in the laminas prior to coaxially stacking the laminas. The lamina may al |
| 5349740 |
Method and progressive die assembly with separate blanking and stacking for the manufacture of l |
September 27, 1994 |
| Elongated thin strip stock is blanked to form interlocking laminas for electric motor or generator rotors or stators at successive blanking stations. The laminas are blanked at one station and pushed back into the strip stock to be carried to a final station where the laminas are stacked |
| 5241138 |
Coreweighing system for closed-loop stock gauging control |
August 31, 1993 |
| A core conveyor system for electric motor manufacturing apparatus, including a core weighing station for improving the accuracy of stock measurement in manufacturing electric motor stator and rotor laminated stacks or cores from sheet stock. Stock is initially measured to determine a |
| 5123155 |
Apparatus and method for manufacturing laminated parts |
June 23, 1992 |
| Elongated thin strip stock is blanked to form interlocking laminas for electric motor or generator rotors or stators at successive blanking stations. At a final assembly station the laminas are stacked and pressed into interlocking relationship. In response to an operator input a pre |
| 5087849 |
Laminated parts and a method for manufacture thereof |
February 11, 1992 |
| Elongated thin strip stock is blanked to form interlocking laminas for electric motor or generator rotors or stators at successive blanking stations. At a final assembly station the laminas are stacked and pressed into interlocking relationship. In response to an operator input a pre |
| 4738020 |
Method for manufacture of laminated parts |
April 19, 1988 |
| Elongated thin strip stock is blanked to form interlocking laminas for electric motor or generator rotors or stators at successive blanking stations. At a final assembly station the laminas are stacked and pressed into interlocking relationship. In response to an operator input a pre |
| 4619028 |
Apparatus for manufacture of laminated parts |
October 28, 1986 |
| Elongated thin strip stock is blanked to form interlocking laminas for electric motor or generator rotors or stators at successive blanking stations. At a final assembly station the laminas are stacked and pressed into interlocking relationship. In response to an operator input a pre |
