Patent US3756628A successfully refreshed from Google Patents.
US3756628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Threaded connection
Assignee: Atos Origin IT Services Inc
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Filing: 1972-03-23
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Granted: 1973-09-04
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Expires: 1992-03-23
Abstract
Abstract A die-cast meter top has integral hubs provided with external screw threads to receive a thin sleeve of hard metal, such as steel, which is provided with an internal screw thread fitting said external screw thread on the hub, the sleeve having an external screw thread to receive the internal screw thread on a coupling nut. The sleeve is plastic coated, preferably fluidized bed coated with epoxy, and there is a coating of epoxy resin between the hub and the sleeve to secure the sleeve to the hub against movement and electrically insulate the sleeve from the hub for protection against galvanic corrosion.
Inventors
- 👤 T Clair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:15
CPC Classifications
F; F16; F16L; F16L25/00; F16L25/02; F16L25/023; Y; Y10; Y10S; Y10S285/00; Y10S285/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
Threaded connecting means comprising a nipple having external screw threads at one end and a flange at the other end, a nut of hard metal having internal screw threads, and having a flange adapted to engage the flange on the nipple, a hub of soft metal having external screw threads, a thin sleeve of hard metal having external screw threads and internal screw threads interposed between said hub and said nut and threadably engaging said screw threads on said nut and on said hub respectively, said sleeve being coated with dielectric plastic material, an elastomeric washer between and electrically insulating said flange on the nipple and the top of the hub, the crest diameter of the screw threads on the hub being slightly less than that of the root diameter of said screw threads on the sleeve, the resulting spaces between the screw threads on the hub and the coated screw threads on the sleeve being filled with cementitious material, the hub having a bore in which a neck portion on the nipple extends.
Claim 2
Dependent Claim
174 words
Threaded connecting means comprising a nipple having external screw threads at one end and a flange at the other end, a nut of hard metal having internal screw threads, and having a flange adapted to engage the flange on the nipple, a hub of soft metal having external screw threads, a thin sleeve of hard metal having external screw threads and internal screw threads interposed between said hub and said nut and threadably engaging said screw threads on said nut and on said hub respectively, said sleeve being coated with dielectric plastic material, an elastomeric washer between and electrically insulating said flange on the nipple and the top of the hub, the crest diameter of the screw threads on the hub being slightly less than that of the root diameter of said screw threads on the sleeve, the resulting spaces between the screw threads on the hub and the coated screw threads on the sleeve being filled with cementitious material, the hub having a bore in which a neck portion on the nipple extends.
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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) | 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 |