US4851732A — Spark plug having a flame deflector for use in an…

Claim 1

Independent Claim 128 words

A spark plug adapted for use in an internal combustion engine comprising; (a) a housing having means to attach to an internal combustion engine; (b) insulator means disposed within the housing; (c) a high tension electrode axially disposed within the insulator means and insulated form the housing; (d) a substantially L-shaped ground electrode having a first leg depending axially from the housing and a second leg having its free end extending radially inward and spaced axially from the first electrode; (e) a plurality of equally spaced apart rectilinear combustion flame deflecting plates extending axially from the housing and disposed generally parallel to said high tension electrode and disposed radially about the first electrode to define a combustion chamber, said plates having an axial length greater than the width.

Claim 2

Dependent Claim 128 words

A spark plug adapted for use in an internal combustion engine comprising; (a) a housing having means to attach to an internal combustion engine; (b) insulator means disposed within the housing; (c) a high tension electrode axially disposed within the insulator means and insulated form the housing; (d) a substantially L-shaped ground electrode having a first leg depending axially from the housing and a second leg having its free end extending radially inward and spaced axially from the first electrode; (e) a plurality of equally spaced apart rectilinear combustion flame deflecting plates extending axially from the housing and disposed generally parallel to said high tension electrode and disposed radially about the first electrode to define a combustion chamber, said plates having an axial length greater than the width.

Claim 3

Dependent Claim 37 words

The spark plug of claim 1 wherein each of the plates are disposed in a plane extending radially outward from the high tension electrode whereby combustion gas upon ignition in said combustion chamber is directed radially outward.

Claim 4

Dependent Claim 37 words

The spark plug of claim 1 wherein the plates are disposed in a plane angled from the radial direction from the high tension electrode whereby combustion gas upon ignition in said combustion chamber is directed spirally outward.

Claim 5

Dependent Claim 26 words

The spark plug of claim 3 wherein the plates are disposed at an angle of about 45° to the radial direction from the high tension electrode.

Claim 6

Dependent Claim 32 words

The spark plug of claim 1 wherein the plates have an axial length greater than the length of the high tension electrode whereby the plates extend axially beyond the high tension electrode.

Claim 7

Dependent Claim 37 words

The spark plug of claim 1 wherein the plates have a substantially L-shape comprising a first leg extending axially from the housing and a second leg having a free end extending inwardly toward the high tension electrode.

Claim 8

Dependent Claim 23 words

The spark plug of claim 6 wherein the end of the second leg is axially and radially spaced from the high tension electrode.

Claim 9

Dependent Claim 36 words

The spark plug of claim 6 wherein the L-shaped plates are disposed in a plane extending radially outward from the high tension electrode whereby combustion gas upon ignition in said combustion chamber is directed radially outward.

Claim 10

Dependent Claim 38 words

The spark plug of claim 6 wherein the L-shaped plates are disposed in a plane angled from the radial direction from the high tension electrode whereby combustion gas upon ignition in said combustion chamber is directed spirally outward.

Claim 11

Dependent Claim 27 words

The spark plug of claim 9 wherein the L-shaped plates are disposed at an angle of about 30° to the radial direction from the high tension electrode.

Claim 12

Dependent Claim 61 words

The spark plug of claim 1 wherein the second leg of the ground electrode has a substantially U-shaped cross-section defined by a top portion and depending longitudinal sides extending axially away from the high tension electrode, said longitudinal sides defining a combustion cavity for a fuel mixture, said top portion having at least one aperture to communicate with the combustion cavity.

Claim 13

Dependent Claim 11 words

The spark plug of claim 11 wherein the aperture is circular.

Claim 14

Dependent Claim 13 words

The spark plug of claim 12 wherein two spaced apart apertures are provided.

Claim 15

Dependent Claim 38 words

The spark plug of claim 11 wherein the aperture is a longitudinal slit having a width less than the diameter of the high tension electrode and a longitudinal length greater than the diameter of the high tension electrode.

Claim 16

Dependent Claim 13 words

The spark plug of claim 11 wherein the longitudinal sides are substantially semi-circular.

Claim 17

Dependent Claim 12 words

The spark plug of claim 1 wherein four deflecting plates are provided.

Claim 18

Dependent Claim 153 words

A spark plug adapted for use in an internal combustion engine comprising; (a) a housing; (b) electrical insulator means axially disposed within the housing; (c) a high tension electrode axially disposed within the insulator means and insulated from the housing; (d) a substantially L-shaped ground electrode having a first leg depending axially from the housing and a second leg extending radially inward and spaced axially from the first electrode; (e) a removable annular sleeve receiving the housing and adapted to be mounted in an internal combustion engine; (f) a plurality of equally spaced apart rectilinear combustion flame deflecting plates extending axially from the annual sleeve and disposed generally parallel to said high tension electrode and disposed radially about the high tension electrode, said plates having a first leg extending axially from the sleeve and a second leg extending inwardly toward the high tension electrode, said plates being disposed to define a combustion chamber.

Claim 19

Dependent Claim 153 words

A spark plug adapted for use in an internal combustion engine comprising; (a) a housing; (b) electrical insulator means axially disposed within the housing; (c) a high tension electrode axially disposed within the insulator means and insulated from the housing; (d) a substantially L-shaped ground electrode having a first leg depending axially from the housing and a second leg extending radially inward and spaced axially from the first electrode; (e) a removable annular sleeve receiving the housing and adapted to be mounted in an internal combustion engine; (f) a plurality of equally spaced apart rectilinear combustion flame deflecting plates extending axially from the annual sleeve and disposed generally parallel to said high tension electrode and disposed radially about the high tension electrode, said plates having a first leg extending axially from the sleeve and a second leg extending inwardly toward the high tension electrode, said plates being disposed to define a combustion chamber.

Claim 20

Dependent Claim 36 words

The spark plug of claim 17 wherein the L-shaped plates are disposed in a plane extending radially outward from the high tension electrode whereby combustion gas upon ignition in said combustion chamber is directed radially outward.

Claim 21

Dependent Claim 37 words

The spark plug of claim 17 wherein the L-shaped plates are disposed in a plane angled from the radial direction from the first electrode whereby combustion gas upon ignition in said combustion chamber is directed spirally outward.

Claim 22

Dependent Claim 27 words

The spark plug of claim 19 wherein the L-shaped plates are disposed at an angle of about 30° to the radial direction from the high tension electrode.

Claim 23

Dependent Claim 61 words

The spark plug of claim 17 wherein the second leg of the ground electrode has a substantially U-shaped cross-section defined by a top portion and depending longitudinal sides extending axially away from the high tension electrode, said longitudinal sides defining a combustion cavity for a fuel mixture, said top portion having at least one aperture to communicate with the combustion cavity.

Claim 24

Dependent Claim 11 words

The spark plug of claim 21 wherein the aperture is circular.

Claim 25

Dependent Claim 13 words

The spark plug of claim 22 wherein two spaced apart apertures are provided.

Claim 26

Dependent Claim 38 words

The spark plug of claim 21 wherein the aperture is a longitudinal slit having a width less than the diameter of the high tension electrode and a longitudinal length greater than the diameter of the high tension electrode.

Claim 27

Dependent Claim 13 words

The spark plug of claim 21 wherein the longitudinal sides are substantially semi-circular.

Claim 28

Dependent Claim 12 words

The spark plug of claim 17 wherein four deflector plates are provided.

Claim 29

Dependent Claim 22 words

The spark plug of claim 17 wherein the housing includes external threads and the sleeve includes internal threads to receive the housing.

Claim 30

Dependent Claim 134 words

A combustion flame deflecting device adapted for use with a spark plug in combination with an internal combustion engine, the spark plug being of the type comprising a threaded housing, insulator means disposed within the housing, an axially disposed high tension electrode and a substantially L-shaped ground electrode cooperating with the high tension electrode, said deflecting device comprising an internally threaded sleeve adapted to receive a threaded spark plug, the sleeve further having external threads for mounting the sleeve in an internal combustion engine, a plurality of equally spaced apart combustion flame deflecting plates extending axially from the annular sleeve, wherein said plates have a first leg extending axially from and generally parallel to the sleeve and a second leg extending radially inwardly toward the center of said sleeve to define a combustion chamber.

Claim 31

Dependent Claim 134 words

A combustion flame deflecting device adapted for use with a spark plug in combination with an internal combustion engine, the spark plug being of the type comprising a threaded housing, insulator means disposed within the housing, an axially disposed high tension electrode and a substantially L-shaped ground electrode cooperating with the high tension electrode, said deflecting device comprising an internally threaded sleeve adapted to receive a threaded spark plug, the sleeve further having external threads for mounting the sleeve in an internal combustion engine, a plurality of equally spaced apart combustion flame deflecting plates extending axially from the annular sleeve, wherein said plates have a first leg extending axially from and generally parallel to the sleeve and a second leg extending radially inwardly toward the center of said sleeve to define a combustion chamber.

Claim 32

Dependent Claim 34 words

The spark plug of claim 28 wherein the L-shaped plates are disposed in a plane extending radially outward from the sleeve whereby combustion gas upon ignition in said combustion chamber is directed radially outward.

Claim 33

Dependent Claim 36 words

The spark plug of claim 28 wherein the L-shaped plates are disposed in a plane angled from the radial direction of the sleeve whereby combustion gas upon ignition in said combustion chamber is directed spirally outward.

Claim 34

Dependent Claim 25 words

The spark plug of claim 30 wherein the L-shaped plates are disposed at an angle of about 30° to the radial direction of the sleeve.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1992-07-24	1993-01-23	1993-07-25	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1996-07-24	1997-01-23	1997-07-25	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2000-07-24	2001-01-23	2001-07-25	$7700.00	Window Closed / Lapsed

Spark plug having a flame deflector for use in an internal combustion engine

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