US3755885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a sealing coating on a metallic member
Assignee: Individual
•
Filing: 1972-01-03
•
Granted: 1973-09-04
•
Expires: 1992-01-03
Abstract
Abstract A hermetic sealing coating is formed on a surface of a metallic element to be brought into sealing contact with another element by pressing the first element against a metal member in a vacuum at a pressure and temperature to ensure molecular diffusion cohesion of the metal of the first element with the metal of the contacting member whereafter the two are parted. The procedure is repeated until a finely dispersed layer is formed on the surface of the metallic element.
Inventors
- 👤 Georgy Filippovich Polyakov
- 👤 Vladimir Lvovich Vanin
- 👤 Vladimir Alexandrovich Kamardin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:39
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/08; F16J15/0806; F16K; F16K25/00; F16K51/00; F16K51/02; Y; Y10; Y10S; Y10S277/00; Y10S277/913; Y10S277/935; Y10S277/939
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
127 words
A method of forming a sealing coating on metallic sealing members, said method comprising the steps of: compressing one sealing member against another sealing member in a vacuum; holding the members compressed until molecular diffusion of the metals of the members takes place; separating the members while continuously maintaining them in the vacuum, and repeating the above steps several times until there is formed on the contact surfaces of the sealing members a finely dispersed metallic layer caused by transfer of material from one member to the other, said finely dispersed metallic layer being formed of granules of irregular shape distributed throughout said layer, said metallic layer being formed with a thickness of 10-400 microns, said granules being formed of a size between 1 and 100 microns.
Claim 2
Independent Claim
127 words
A method of forming a sealing coating on metallic sealing members, said method comprising the steps of: compressing one sealing member against another sealing member in a vacuum; holding the members compressed until molecular diffusion of the metals of the members takes place; separating the members while continuously maintaining them in the vacuum, and repeating the above steps several times until there is formed on the contact surfaces of the sealing members a finely dispersed metallic layer caused by transfer of material from one member to the other, said finely dispersed metallic layer being formed of granules of irregular shape distributed throughout said layer, said metallic layer being formed with a thickness of 10-400 microns, said granules being formed of a size between 1 and 100 microns.
Claim 3
Dependent Claim
57 words
A method as claimed in claim 1 wherein the other member against which the first sealing member is compressed and separated is intended to form a seal with the first sealing member in a sealing device, the seal between the two members being formed by compressing the members together to obtain plastic intermixing of the layers thereof.
Claim 4
Dependent Claim
32 words
A method as claimed in claim 2 wherein the compression and separation is repeated until the sealing layers on the members are self-restoring in the course of subsequent sealing and unsealing operations.
Claim 5
Dependent Claim
65 words
A method as claimed in claim 3 wherein the first sealing member and the other member are of the same metal and constitute opposed sealing elements of the sealing device, one member being formed with a boss and the other with a groove to receive the boss, the sealing layers being formed at the bottom of the groove and the outer edge of the boss.
Claim 6
Dependent Claim
33 words
A method as claimed in claim 3 wherein the sealing layers are formed so as to be plastically deformable at substantially lower pressures as compared to the underlying metal of the corresponding member.
References Cited (Backward Citations)
US3393445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |