US3884007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hermetic seal and method
Assignee: RCA Corp
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Filing: 1974-06-20
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Granted: 1975-05-20
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Expires: 1994-06-20
Abstract
Abstract An annular metal flange portion of a member is concentrically arranged with respect to a glass cylindrical member and is reliably sealed to a side wall surface of the glass member by a hermetic sealing glass formed within an accumulation cavity between the metal and glass member. A compressive member is provided within the cavity for applying a compressive force during assembly against glass sealant material, and sealing glass formed therefrom, disposed within the cavity. A compressive force is applied to the compressive member during a heating operation of the sealing method for removal of liquid carriers of the glass sealant material and for hermetically sealing glass particles of that material. Compensation for shrinkage of the glass sealant material, and the sealing glass formed therefrom, during that heating operation is thereby provided. Also, the formation of bubbles and voids within the glass sealant material, and the sealing glass formed therefrom, is substantially avoided.
Inventors
- 👤 Daniel Laverne Thoman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:49
CPC Classifications
C; C03; C03C; C03C27/00; C03C27/04; C03C27/042; C03C27/044; G; G02; G02B; G02B7/00; G02B7/007; H; H01; H01J; H01J5/00; H01J5/20; H01J5/22; H01J5/26; Y; Y10; Y10T; Y10T156/00; Y10T156/10
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
142 words
A hermetic seal between two or more members comprising: a. a first member having a first sealing surface portion; b. a second member having a second sealing surface portion including a contoured surface region proximately spaced apart from said first sealing surface portion, said first sealing surface portion in facing cooperating relation with said contoured surface region to form therebetween an accumulation cavity capable of substantially retaining viscous material disposed therein, c. sealing glass, within said accumulation cavity, hermetically sealing said first and second sealing surface portions, d. means abutting said sealing glass, within said accumulation cavity, capable of applying compressive force against the sealing glass to provide compensation for shrinkage, and to substantially avoid bubble and void formation, in said sealing glass, and the material from which it is formed, during hermetic sealing and formation of said sealing glass in assembly.
Claim 2
Dependent Claim
142 words
A hermetic seal between two or more members comprising: a. a first member having a first sealing surface portion; b. a second member having a second sealing surface portion including a contoured surface region proximately spaced apart from said first sealing surface portion, said first sealing surface portion in facing cooperating relation with said contoured surface region to form therebetween an accumulation cavity capable of substantially retaining viscous material disposed therein, c. sealing glass, within said accumulation cavity, hermetically sealing said first and second sealing surface portions, d. means abutting said sealing glass, within said accumulation cavity, capable of applying compressive force against the sealing glass to provide compensation for shrinkage, and to substantially avoid bubble and void formation, in said sealing glass, and the material from which it is formed, during hermetic sealing and formation of said sealing glass in assembly.
Claim 3
Dependent Claim
47 words
A hermetic seal in accordance with claim 1, wherein said contoured surface region of said second sealing surface portiOn includes: a cross-section wherein said contoured surface region defines a substantially L-shaped surface region which cooperates with said first sealing surface portion to form therebetween said accumulation cavity.
Claim 4
Dependent Claim
82 words
A hermetic seal in accordance with claim 2, wherein said second sealing surface portion includes: a terminal sealing edge surface portion, of said contoured surface region, more proximate to said first sealing surface portion than other portions of said contoured surface region, said sealing edge surface portion being spaced from said first sealing surface portion to form a substantially uniform gap therebetween capable of substantially restricting the flow of said sealing glass therethrough when said sealing glass is in a viscous state.
Claim 5
Dependent Claim
31 words
A hermetic seal in accordance with claim 3, wherein said first and second sealing surface portions comprise substantially facing surface portions of the peripheral surfaces of telescoped first and second members.
Claim 6
Dependent Claim
20 words
A hermetic seal in accordance with claim 4, wherein said peripheral surface of said first member comprises a cylindrical surface.
Claim 7
Dependent Claim
67 words
A hermetic seal in accordance with claim 5, wherein said means comprises: a compressive member having a cylindrical tubelike portion telescoping between said peripheral surface of said first member and a region of said contoured surface region less proximate to said first sealing surface portion than said terminal sealing edge; said tube-like portion including an inner and outer surface which abuts said sealing glass within said cavity.
Claim 8
Dependent Claim
31 words
A hermetic seal in accordance with claim 5, additionally comprising said first member including a peripheral sealing surface comprised of a glass material, and said second member comprising a metal flange.
Claim 9
Dependent Claim
49 words
A hermetic seal in accordance with claim 7, wherein the material composition of said sealing glass, flange, and compressive member are each selected to display substantially similar thermal coefficients of expansion, but slightly greater than the thermal coefficient of expansion displayed by said sealing surface of said first member.
Claim 10
Independent Claim
203 words
A method of providing a hermetic seal between a surface portion of a first member and a facing surface portion of a second member, the facing surface portion of the second member including a surface contour region, comprising the steps of: a. positioning and retaining the surface contour region proximate to the surface portion of the first member in substantially uniform spaced-apart relation thereto, wherein said surface contour region includes a terminal edge portion more proximate to said first member than other portions of said surface contour region, said surface contour region cooperating with said surface portion of said first member to form therebetween a cavity capable of receiving and substantially retaining a viscous material composition; b. disposing a viscous composition of glass sealant material, which includes particles of a sealing glass dispersed within at least one liquid carrier, within said receiving cavity; c. applying a substantially uniform compressive force against said glass sealant material by means of a compressive member while simultaneously heating the assemblage formed by steps (a-b) as an aligned unit to a temperature and time period sufficient to remove said liquid carrier and to form sealing glass by hermetically sealing together the sealing glass particles of said sealant material.
Claim 11
Independent Claim
203 words
A method of providing a hermetic seal between a surface portion of a first member and a facing surface portion of a second member, the facing surface portion of the second member including a surface contour region, comprising the steps of: a. positioning and retaining the surface contour region proximate to the surface portion of the first member in substantially uniform spaced-apart relation thereto, wherein said surface contour region includes a terminal edge portion more proximate to said first member than other portions of said surface contour region, said surface contour region cooperating with said surface portion of said first member to form therebetween a cavity capable of receiving and substantially retaining a viscous material composition; b. disposing a viscous composition of glass sealant material, which includes particles of a sealing glass dispersed within at least one liquid carrier, within said receiving cavity; c. applying a substantially uniform compressive force against said glass sealant material by means of a compressive member while simultaneously heating the assemblage formed by steps (a-b) as an aligned unit to a temperature and time period sufficient to remove said liquid carrier and to form sealing glass by hermetically sealing together the sealing glass particles of said sealant material.
Claim 12
Dependent Claim
58 words
The method of claim 9, wherein step (c) additionally includes: applying an effective amount of force to said glass sealant material during said time period, whereby compensation for shrinkage of said glass sealant material and sealing glass is substantially provided, and whereby gas bubbles and void formations within the glass sealant material and sealing glass are substantially avoided.
Claim 13
Dependent Claim
53 words
The method of claim 9, additionally including the step of: forming said glass sealant material as a viscous mass comprising Particles of sealing glass disposed within at least one liquid binder, said mass having a viscosity permitting substantial retension of said sealant material, disposed in step (b), within said cavity during step (c).
Claim 14
Dependent Claim
45 words
The method of claim 11, wherein said glass sealant material includes a nitrocellulose binder and an air drying solvent, the method additionally including the step of substantially removing said solvent by air drying the assembly after accomplishing step (b), but prior to accomplishing step (c).
Claim 15
Dependent Claim
71 words
The method of claim 9, wherein said terminal edge portion is proximately spaced-apart from the surface portion of said first member and forms a substantially uniform sealing gap between said surface portion of said first member and said edge portion of said second member, step (c) of the method additionally comprising restrictingly forcing a portion of said sealant material through the sealing gap, during said time period, by said compressive force.
Claim 16
Dependent Claim
60 words
The method of claim 13, wherein step (c) of the method additionally comprises: applying an effective amount of force against said glass sealant material during said time period, whereby compensation for shrinkage of said glass sealant material and sealing glass is provided, and whereby gas bubbles and void formation within the glass sealant material and sealing glass is substantially avoided.
Claim 17
Dependent Claim
43 words
The method of claim 9, wherein said surface portion of said first member comprises a peripheral wall surface thereof, step (a) of the method additionally comprising positioning said surface portions of said first and second members in telescopic substantially uniformly spaced-apart concentric relation.
Claim 18
Dependent Claim
103 words
The method of claim 15, wherein said peripheral wall surface of said first member comprises a glass material and wherein said second member comprises a metal material, the method additionally comprises: selecting the material composition for said sealing glass, said second member, and said compressive member, which display substantially similar thermal coefficients of expansion; and selecting a material composition for said first member, wherein the integrity of the hermetic seal is maintained partially by compression between said first and second members whenever the assemblage formed in steps (a-c) is cooled to a temperature below the hermetic sealing temperature of said sealing glass particles.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |