Patent US4932673A successfully refreshed from Google Patents.
US4932673A
Expired / Lapsed
US
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Emi suppression gasket for millimeter waveguides
Assignee: The AT&T MVPD Group LLC
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Filing: 1988-02-01
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Granted: 1990-06-12
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Expires: 2008-02-01
Abstract
Abstract A one-piece gasket is used between millimeter waveguide sections to prevent energy leakage from the joint. The gasket consists of an electrically conductive elastomeric ring filled with metallic particles, a conformable metallic inner shield on the inner periphery of the ring, and a conformable metallic outer shield on the outer periphery of the ring. The gasket is conveniently prepared by casting the filled elastomer in place between the shields.
Inventors
- 👤 Larissa Domnikov
- 👤 Theodore S. Fishkin
- 👤 James A. Patrick
- 👤 Gilbert Garcia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:43
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/04; H01P1/042; Y; Y10; Y10S; Y10S277/00; Y10S277/919; Y10S277/92; Y10S277/935; Y10S277/936; Y10S277/939; Y10S277/941; Y10S277/942
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
126 words
A gasket for use in sealing a joint between two millimeter waveguides, each waveguide having an end disposed in an abutting relation to an end of the other waveguide, comprising: an electrically conductive, conformable plate having an outer periphery and dimensioned to fit between and contact the ends of the two millimeter waveguides, and having a bore therethrough defining an inner periphery of the plate; an inner shield of a conformable metal sheet through which millimeter waves are not permitted to pass, joined to the inner periphery of the plate and extending between the waveguides; and an outer shield of a conformable metal sheet through which millimeter waves are not permitted to pass, joined to the outer periphery of the plate and extending between the waveguides.
Claim 2
Dependent Claim
126 words
A gasket for use in sealing a joint between two millimeter waveguides, each waveguide having an end disposed in an abutting relation to an end of the other waveguide, comprising: an electrically conductive, conformable plate having an outer periphery and dimensioned to fit between and contact the ends of the two millimeter waveguides, and having a bore therethrough defining an inner periphery of the plate; an inner shield of a conformable metal sheet through which millimeter waves are not permitted to pass, joined to the inner periphery of the plate and extending between the waveguides; and an outer shield of a conformable metal sheet through which millimeter waves are not permitted to pass, joined to the outer periphery of the plate and extending between the waveguides.
Claim 3
Dependent Claim
29 words
The gasket of claim 1, wherein said inner shield and said outer shield are formed of a metal selected from the group consisting of aluminum, silver, gold, and copper.
Claim 4
Dependent Claim
15 words
The gasket of claim 1, wherein said plate is formed of an electrically conductive elastomer.
Claim 5
Dependent Claim
18 words
The gasket of claim 1, wherein said plate is formed of rubber filled with electrically conductive metallic particles.
Claim 6
Dependent Claim
15 words
The gasket of claim 4, wherein the particles are a mixture of powders and flakes.
Claim 7
Dependent Claim
21 words
The gasket of claim 4, wherein the volume fraction of metallic particles in said plate is at least about 60 percent.
Claim 8
Dependent Claim
16 words
The gasket of claim 1, wherein the thickness of said inner shield is about 0.005 inches.
Claim 9
Dependent Claim
16 words
The gasket of claim 1, wherein the thickness of said outer shield is about 0.005 inches.
Claim 10
Dependent Claim
79 words
A gasket for sealing a joint between two pieces, comprising: an electrically conductive, flexible plate having a central bore therethrough and an outer periphery; a metallic inner shield through which short wavelength energy is not permitted to pass, joined to the plate along the central bore and extending between the pieces; and a metallic outer shield through which short wavelength energy is not permitted to pass, joined to the plate along its outer periphery and extending between the pieces.
Claim 11
Dependent Claim
79 words
A gasket for sealing a joint between two pieces, comprising: an electrically conductive, flexible plate having a central bore therethrough and an outer periphery; a metallic inner shield through which short wavelength energy is not permitted to pass, joined to the plate along the central bore and extending between the pieces; and a metallic outer shield through which short wavelength energy is not permitted to pass, joined to the plate along its outer periphery and extending between the pieces.
Claim 12
Dependent Claim
29 words
The gasket of claim 9, wherein said inner shield and said outer shield are formed of a metal selected from the group consisting of aluminum, silver, gold, and copper.
Claim 13
Dependent Claim
15 words
The gasket of claim 9, wherein said plate is formed of an electrically conductive elastomer.
Claim 14
Dependent Claim
18 words
The gasket of claim 9, wherein said plate is formed of rubber filled with electrically conductive metal particles.
Claim 15
Dependent Claim
14 words
The gasket of claim 9, wherein said plate has the shape of a disk.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |