US4166207A — Microwave generating device--door seal

Claim 1

Independent Claim 220 words

In a microwave generating device having a cabinet defining a cavity provided with an opening with a front edge portion of the cabinet defining the outward periphery of the opening, a closure impervious to the microwave energy extending removably across said opening and having a peripheral portion forwardly overlying said cabinet edge portion, and means for generating microwave energy in the cavity, improved series and parallel related seal means for preventing loss of microwave energy outwardly between said closure peripheral portion and said cabinet opening edge portion comprising: cooperating surface portions on said closure peripheral portion and said cabinet opening edge portion facially juxtaposed when said closure is disposed across said opening and defining a first capacitive seal against transmission of microwave energy outwardly from said cavity therebetween; a metallic frame extending about said closure peripheral portion and having a recess opening inwardly toward said capacitive seal to define a wave trap having a length preselected to be effectively one-quarter the wavelength of the microwave energy; a second capacitive seal outwardly of said wave trap; an electrically conductive reflective seal embracing said closure peripheral portion within said frame and forwardly of said wave trap; and a microwave energy absorbing seal between said frame and said cabinet opening edge portion rearwardly of said wave trap and outwardly of said capacitive seal.

Claim 2

Dependent Claim 220 words

In a microwave generating device having a cabinet defining a cavity provided with an opening with a front edge portion of the cabinet defining the outward periphery of the opening, a closure impervious to the microwave energy extending removably across said opening and having a peripheral portion forwardly overlying said cabinet edge portion, and means for generating microwave energy in the cavity, improved series and parallel related seal means for preventing loss of microwave energy outwardly between said closure peripheral portion and said cabinet opening edge portion comprising: cooperating surface portions on said closure peripheral portion and said cabinet opening edge portion facially juxtaposed when said closure is disposed across said opening and defining a first capacitive seal against transmission of microwave energy outwardly from said cavity therebetween; a metallic frame extending about said closure peripheral portion and having a recess opening inwardly toward said capacitive seal to define a wave trap having a length preselected to be effectively one-quarter the wavelength of the microwave energy; a second capacitive seal outwardly of said wave trap; an electrically conductive reflective seal embracing said closure peripheral portion within said frame and forwardly of said wave trap; and a microwave energy absorbing seal between said frame and said cabinet opening edge portion rearwardly of said wave trap and outwardly of said capacitive seal.

Claim 3

Dependent Claim 26 words

The microwave generating device of claim 1 wherein the length of the capacitive seal is preselected to be substantially one-quarter the wavelength of the microwave energy.

Claim 4

Dependent Claim 16 words

The microwave generating device of claim 1 wherein said microwave energy seal comprises a reflecting seal.

Claim 5

Dependent Claim 16 words

The microwave generating device of claim 1 wherein said microwave energy seal comprises an absorbing seal.

Claim 6

Dependent Claim 32 words

The microwave generating device of claim 1 including cooperating surface portions on said frame and said cabinet outer edge portion outwardly of said first named capacitive seal defining said secondary capacitive seal.

Claim 7

Dependent Claim 18 words

The microwave generating device of claim 1 wherein a body of filler material is provided in said recess.

Claim 8

Dependent Claim 19 words

The microwave generating device of claim 1 wherein a cover is mounted to said frame for covering said recess.

Claim 9

Dependent Claim 20 words

The microwave generating device of claim 1 wherein said electrically conductive seal is formed of carbon loaded synthetic resin material.

Claim 10

Dependent Claim 22 words

The microwave generating device of claim 1 wherein said microwave energy seal comprises an absorbing seal formed of ferrite-impregnated synthetic resin material.

Claim 11

Dependent Claim 35 words

The microwave generating device of claim 1 further including closely spaced cooperating surface portions on said frame and said cabinet outer edge portion outwardly of said first named capacitive seal defining a secondary capacitive seal.

Claim 12

Dependent Claim 24 words

The microwave generating device of claim 1 wherein said cooperating surface portions are closely spaced with a thin body of dielectric material disposed therebetween.

Claim 13

Dependent Claim 30 words

The microwave generating device of claim 1 wherein said cooperating surface portions are closely spaced with a thin body of dielectric material carried on said closure to be disposed therebetween.

Claim 14

Dependent Claim 12 words

The microwave generating device of claim 1 wherein said recess is straight.

Claim 15

Dependent Claim 12 words

The microwave generating device of claim 1 wherein said recess is turned.

Claim 16

Dependent Claim 18 words

The microwave generating device of claim 1 wherein said recess is turned to extend outwardly of said closure.

Claim 17

Dependent Claim 231 words

In a microwave generating device having a cabinet defining a cavity provided with an opening with a front edge portion of the cabinet defining the outward periphery of the opening, a closure impervious to the microwave energy extending removably across said opening and having a peripheral portion forwardly overlying said cabinet edge portion, and means for generating microwave energy in the cavity, improved series and parallel related seal means for preventing loss of microwave energy outwardly between said closure peripheral portion and said cabinet opening edge portion comprising: a surface portion of said cabinet opening edge portion including a planar inner portion, an outwardly angled midportion, and an outer portion; a cooperating planar inner portion on said closure peripheral portion facially juxtaposed to said cabinet outer edge portion planar inner portion when said closure is disposed across said opening and defining a capacitive seal against transmission of microwave energy outwardly from said cavity therebetween; and a metallic frame extending about said closure peripheral portion and having a recess rearwardly of said peripheral portion and opening inwardly toward said capacitive seal to define a wave trap having a length preselected to be effectively one-quarter the wavelength of the microwave energy, said frame being spaced outwardly from said cabinet opening edge portion outer portion and defining therewith a second capacitive seal outwardly of said first capacitive seal and rearwardly of said wave trap.

Claim 18

Dependent Claim 231 words

In a microwave generating device having a cabinet defining a cavity provided with an opening with a front edge portion of the cabinet defining the outward periphery of the opening, a closure impervious to the microwave energy extending removably across said opening and having a peripheral portion forwardly overlying said cabinet edge portion, and means for generating microwave energy in the cavity, improved series and parallel related seal means for preventing loss of microwave energy outwardly between said closure peripheral portion and said cabinet opening edge portion comprising: a surface portion of said cabinet opening edge portion including a planar inner portion, an outwardly angled midportion, and an outer portion; a cooperating planar inner portion on said closure peripheral portion facially juxtaposed to said cabinet outer edge portion planar inner portion when said closure is disposed across said opening and defining a capacitive seal against transmission of microwave energy outwardly from said cavity therebetween; and a metallic frame extending about said closure peripheral portion and having a recess rearwardly of said peripheral portion and opening inwardly toward said capacitive seal to define a wave trap having a length preselected to be effectively one-quarter the wavelength of the microwave energy, said frame being spaced outwardly from said cabinet opening edge portion outer portion and defining therewith a second capacitive seal outwardly of said first capacitive seal and rearwardly of said wave trap.

Claim 19

Dependent Claim 27 words

The microwave generating device of claim 16 wherein the juncture of said midportion and said outer portion of the cabinet opening edge portion defines a sharp break.

Claim 20

Dependent Claim 35 words

The microwave generating device of claim 16 wherein the juncture of said midportion and said outer portion of the cabinet opening edge portion defines a sharp break centered over the inner end of said recess.

Claim 21

Dependent Claim 40 words

The microwave generating device of claim 16 wherein said outer portion of the cabinet opening edge portion includes a planar outer end extending parallel to said inner portion, and a turned inner end extending substantially perpendicular to said outer end.

Claim 22

Dependent Claim 135 words

In a microwave generating device having a cabinet defining a cavity provided with a front opening with an edge portion of the cabinet defining the outward periphery of the opening, a closure impervious to the microwave energy extending removably across said opening and having a peripheral portion forwardly overlying said cabinet edge portion, and means for generating microwave energy in the cavity, improved means for preventing loss of microwave energy outwardly between said closure peripheral portion and said cabinet opening edge portion comprising: a frame extending about said closure peripheral portion and defining a wave trap recess rearwardly of said peripheral portion and opening inwardly toward said cabinet opening edge portion; and means on said cabinet opening edge portion defining a localized radiator spaced inwardly of and in centered relationship to said wave trap recess.

Claim 23

Dependent Claim 135 words

In a microwave generating device having a cabinet defining a cavity provided with a front opening with an edge portion of the cabinet defining the outward periphery of the opening, a closure impervious to the microwave energy extending removably across said opening and having a peripheral portion forwardly overlying said cabinet edge portion, and means for generating microwave energy in the cavity, improved means for preventing loss of microwave energy outwardly between said closure peripheral portion and said cabinet opening edge portion comprising: a frame extending about said closure peripheral portion and defining a wave trap recess rearwardly of said peripheral portion and opening inwardly toward said cabinet opening edge portion; and means on said cabinet opening edge portion defining a localized radiator spaced inwardly of and in centered relationship to said wave trap recess.

Claim 24

Dependent Claim 28 words

The microwave generating device of claim 20 wherein a capacitive seal between said closure peripheral portion and cabinet opening edge portion is provided outwardly adjacent said radiator means.

Claim 25

Dependent Claim 51 words

The microwave generating device of claim 20 wherein a first capacitive seal between said closure peripheral portion and cabinet opening edge portion is provided inwardly adjacent said radiator means, and a second capacitive seal between said closure peripheral portion and cabinet opening edge portion is provided outwardly adjacent said radiator means.

Claim 26

Dependent Claim 21 words

The microwave generating device of claim 20 wherein said radiator means comprises a sharp break in said cabinet opening edge portion.

Claim 27

Dependent Claim 44 words

The microwave generating device of claim 20 wherein said recess is partially filled with filler material to cause the effective length of the wave path from the radiator to the bottom of the recess to be substantially one-quarter the wavelength of the microwave energy.

Claim 28

Dependent Claim 65 words

The microwave generating device of claim 20 wherein said recess is provided with a body of polypropylene and has a depth such that the spacing of said radiator from the bottom of the recess is substantially equal to one-quarter the wavelength of the microwave energy in the air and through the composite air and polypropylene path from the radiator to the bottom of the recess.

Claim 29

Dependent Claim 157 words

In a microwave generating device having a cabinet defining a cavity provided with a front opening with an edge portion of the cabinet defining the outward periphery of the opening, a closure impervious to the microwave energy extending removably across said opening and having a peripheral portion forwardly overlying said cabinet edge portion, and means for generating microwave energy in the cavity, improved cooperating energy absorbing and capacitive means for preventing loss of microwave energy outwardly between said closure peripheral portion and said cabinet opening edge portion comprising: a metallic frame embracing the closure peripheral portion and having a surface portion juxtaposed to said cabinet opening edge portion; a microwave energy absorbing seal; and a retainer for mounting said seal to said frame including a spacer portion extending between said frame and said cabinet opening edge portion for accurately spacing said frame surface portion forwardly from said cabinet opening edge portion to define a capacitive seal therewith.

Claim 30

Dependent Claim 157 words

In a microwave generating device having a cabinet defining a cavity provided with a front opening with an edge portion of the cabinet defining the outward periphery of the opening, a closure impervious to the microwave energy extending removably across said opening and having a peripheral portion forwardly overlying said cabinet edge portion, and means for generating microwave energy in the cavity, improved cooperating energy absorbing and capacitive means for preventing loss of microwave energy outwardly between said closure peripheral portion and said cabinet opening edge portion comprising: a metallic frame embracing the closure peripheral portion and having a surface portion juxtaposed to said cabinet opening edge portion; a microwave energy absorbing seal; and a retainer for mounting said seal to said frame including a spacer portion extending between said frame and said cabinet opening edge portion for accurately spacing said frame surface portion forwardly from said cabinet opening edge portion to define a capacitive seal therewith.

Claim 31

Dependent Claim 16 words

The microwave generating device of claim 26 wherein said retainer is formed of synthetic resin material.

Claim 32

Dependent Claim 14 words

The microwave generating device of claim 26 wherein said retainer encloses said absorbing seal.

Claim 33

Dependent Claim 21 words

The microwave generating device of claim 26 wherein said spacer portion comprises an integral thin wall flange portion of said retainer.

Claim 34

Dependent Claim 237 words

In a microwave generating device having a cabinet defining a cavity provided with an opening with a front edge portion of the cabinet defining the outward periphery of the opening edge, said cabinet opening edge portion including a planar inner portion and an outer portion, a closure impervious to the microwave energy extending removably across said opening and having a peripheral portion forwardly overlying said planar inner portion of said cabinet edge portion, and means for generating microwave energy in the cavity, improved means for preventing loss of microwave energy outwardly between said closure peripheral portion and said cabinet opening edge portion comprising: cooperating surface portions on said closure peripheral portion and said planar inner portion of said cabinet opening edge portion facially juxtaposed when said closure is disposed across said opening and defining a capacitive seal against transmission of microwave energy outwardly from said cavity therebetween; a metallic frame extending about said closure peripheral portion and having a recess opening inwardly toward said capacitive seal to define a wave trap having a length generally parallel to said cooperating surface portions and preselected to be effectively one-quarter the wavelength of the microwave energy; and a microwave energy seal carried by said metallic frame and disposed between said frame and said outer portion of said cabinet opening edge portion outwardly of said capacitive seal and rearwardly of said wave trap when said closure is disposed across said opening.

Claim 35

Dependent Claim 237 words

In a microwave generating device having a cabinet defining a cavity provided with an opening with a front edge portion of the cabinet defining the outward periphery of the opening edge, said cabinet opening edge portion including a planar inner portion and an outer portion, a closure impervious to the microwave energy extending removably across said opening and having a peripheral portion forwardly overlying said planar inner portion of said cabinet edge portion, and means for generating microwave energy in the cavity, improved means for preventing loss of microwave energy outwardly between said closure peripheral portion and said cabinet opening edge portion comprising: cooperating surface portions on said closure peripheral portion and said planar inner portion of said cabinet opening edge portion facially juxtaposed when said closure is disposed across said opening and defining a capacitive seal against transmission of microwave energy outwardly from said cavity therebetween; a metallic frame extending about said closure peripheral portion and having a recess opening inwardly toward said capacitive seal to define a wave trap having a length generally parallel to said cooperating surface portions and preselected to be effectively one-quarter the wavelength of the microwave energy; and a microwave energy seal carried by said metallic frame and disposed between said frame and said outer portion of said cabinet opening edge portion outwardly of said capacitive seal and rearwardly of said wave trap when said closure is disposed across said opening.

Claim 36

Dependent Claim 46 words

The microwave generating device of claim 30 wherein said outer portion of said cabinet opening edge portion defines a planar portion generally parallel to said planar inner portion, and said microwave energy seal includes a corresponding surface inwardly adjacent said planar portion of said outer portion.

Claim 37

Dependent Claim 40 words

The microwave generating device of claim 30 wherein the cabinet opening edge portion includes an intermediate portion between said planar inner portion and said outer portion, and said intermediate portion defines a sharp break generally centered over said wave trap.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1982-08-27	1983-02-26	1983-08-28	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1986-08-27	1987-02-26	1987-08-28	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1990-08-27	1991-02-26	1991-08-28	$7700.00	Window Closed / Lapsed

Microwave generating device--door seal

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