US5294270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-treated wire-mesh EMI/RFI shielding gasket
Assignee: Laird Technologies Inc
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Filing: 1992-08-20
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Granted: 1994-03-15
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Expires: 2012-08-20
Abstract
Abstract A wire-mesh gasket fashioned from heat-treatable materials such as beryllium copper alloy wire is knitted or braided into a tubular structure. Plural wires may be used. Various cross-sectional configurations such as circular, teardrop, double lobed, and finned with and without cores are available. Cores may be air, elastomeric, or wire mesh. The formed tubular structure is heat-treated after forming using appropriate time-temperature cycles to strengthen and/or stress relieve the material.
Inventors
- 👤 Gary Fenical
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:35
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0007; H05K9/0015; D; D04; D04B; D04B1/00; D04B1/14
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
53 words
A method of making a wire-mesh gasket structure comprising the steps of: selecting a heat-treatable wire in a soft temper condition; forming the heat-treatable wire into a tubular wire-mesh structure having a nominal dimension; and heat treating the tubular structure to a high temper condition whereby hardening occurs and forming stresses are relieved.
Claim 2
Independent Claim
53 words
A method of making a wire-mesh gasket structure comprising the steps of: selecting a heat-treatable wire in a soft temper condition; forming the heat-treatable wire into a tubular wire-mesh structure having a nominal dimension; and heat treating the tubular structure to a high temper condition whereby hardening occurs and forming stresses are relieved.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein the forming step includes knitting the tubular structure as a helical band of interengaging serpentine loops of wire.
Claim 4
Dependent Claim
15 words
The method of claim 2 wherein the knitting steps uses more than one wire simultaneously.
Claim 5
Dependent Claim
19 words
The method of claim 1 wherein the forming step includes braiding the tubular structure from a plurality of wires.
Claim 6
Dependent Claim
14 words
The method of claim 1 wherein the forming step is performed around a core.
Claim 7
Dependent Claim
12 words
The method of claim 5 wherein the core is an elastomeric material.
Claim 8
Dependent Claim
12 words
The method of claim 1 wherein the tubular shape is longitudinally creased.
Claim 9
Dependent Claim
26 words
The method of claim 1 wherein opposite sides of the tubular shape are pressed together and secured to one another so that a double-lobed shape results.
Claim 10
Dependent Claim
11 words
The method of claim 8 wherein each lobe has a core.
Claim 11
Dependent Claim
16 words
The method of claim 5 wherein the core is a wire-mesh gasket of smaller nominal diameter.
Claim 12
Independent Claim
45 words
A method of making a wire-mesh gasket comprising the steps of selecting a wire in a pre-hardened condition; forming the pre-hardened wire into a tubular structure having a nominal dimension; heat treating the pre-hardened wire to a higher strength condition whereby forming stresses are relieved.
Claim 13
Independent Claim
45 words
A method of making a wire-mesh gasket comprising the steps of selecting a wire in a pre-hardened condition; forming the pre-hardened wire into a tubular structure having a nominal dimension; heat treating the pre-hardened wire to a higher strength condition whereby forming stresses are relieved.
Claim 14
Dependent Claim
39 words
The method of claim 1 wherein the heat-treatment step is accomplished by heating the tubular structure to a temperature in the range of 550° to 900° F. for a time period in the rang of 0.10 to 24 hours.
Claim 15
Dependent Claim
39 words
The method of claim 1 wherein the heat-treatment step is accomplished by heating the tubular structure to a temperature in the range of 550° to 700° F. for a time period in the range of 0.25 to 24 hours.
Claim 16
Dependent Claim
39 words
The method of claim 1 wherein the heat-treatment step is accomplished by heating the tubular structure to a temperature in the range of 550° to 650° F. for a time period in the range of 2 to 3 hours.
Claim 17
Dependent Claim
24 words
The method of claim 1 including the step of forming the wire-mesh gasket structure into an installation configuration prior to the heat treatment step.
Claim 18
Dependent Claim
26 words
The method of claim 1 including the step of preforming the wire-mesh gasket structure to include at least one non-linear section prior to the heat-treatment step.
Claim 19
Dependent Claim
22 words
The method of claim 16 including the step of preforming a complete opening encircling wire-mesh gasket structure prior to the heat-treatment step.
References Cited (Backward Citations)
US2519850A
Cited
US2674644A
Cited
US2755079A
Cited
US3026367A
Cited
US3413406A
Cited
US4065138A
Cited
US4514585A
Cited
US4551185A
Cited
USRE33256E
Cited
US4710590A
Cited
US4731500A
Cited
US4705580A
Cited
US4791236A
Cited
US4979280A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-14 | 1997-09-13 | 1998-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-14 | 2001-09-13 | 2002-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-14 | 2005-09-13 | 2006-03-15 | $7700.00 | Window Closed / Lapsed |