US 6,636,137 B1Granted

Ignition coil assembly

AssigneeL.H. Carbide Corporation

InventorThomas R. Neuenschwander

Life of this patent

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Abstract

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 greater than a width thereof. A first one of the plurality of laminae plates being the widest laminae plate in the stack is located substantially in a center thereof with others of the laminae plates located above and below the first laminae plate and having progressively decreasing widths. Each of the laminae plates in the stack being interlocked to an adjacent laminae plate and the stack having substantially planar end surfaces that are provided with guide elements that are aligned substantially perpendicular to the widths of the plurality of laminae plates. The guide elements include notches and/or projections that can have various geometric shapes.

Claims13

Dependent claims

An ignition coil assembly for an internal combustion engine which comprises:

an inner core element formed from a plurality of laminae plates that are stacked and interlocked together, each of said plurality of laminae plates having a substantially common length and a substantially uniform width along the length thereof, the length of each laminae plate being greater than a width thereof, each of said laminae plates in said stack being interlocked to an adjacent laminae plate by tabs which are interference-fitted into slots, said tabs and slots provided in said adjacent ones of said stacked laminae plates and wherein said plurality of laminae plates form an interlocked stack of laminae plates having a plurality of widths and defining a substantially circular cross section, said interlocked stack of laminae plates having a substantially planar end surface that is provided with a guide element that is aligned substantially perpendicular to the widths of said plurality of laminae plates;
a primary coil and a secondary coil surrounding said inner core element;
an outer core surrounding the primary and secondary coils;
terminal leads coupled to the primary and secondary coils;
and
a high-voltage terminal for receiving a high voltage induced in the secondary coil.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/710,796Filed 9 Nov 2000 · continuation in part
Priority: 5 Jun 1996
Granted: 21 Oct 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

H02K 15/021
Of stator or rotor bodies: magnetic cores
B21D 28/02
Shaping by press-cutting; Perforating: punching blanks or articles with or without obtaining scrap ; Notching
B21D 28/10
Punching blanks or articles with or without obtaining scrap ; Notching: incompletely punching in such a manner that the parts are still coherent…
B21D 28/22
Punching blanks or articles with or without obtaining scrap ; Notching: notching the peripheries of circular blanks, e.g. laminations for…

Family

Application08/658,595Parent of this continuation-in-part · filed 5 Jun 1996
Application08/963,795Parent of this continuation-in-part · filed 4 Nov 1997
US 5,799,387 AParent of this continuation-in-part · filed 1 Sep 1998
Application09/152,979Parent of this continuation-in-part · filed 14 Sep 1998
US 6,131,268 AParent of this continuation-in-part · filed 17 Oct 2000
US 6,636,137 B1This patent

From the US filing history. Foreign family members aren’t listed.