Patent EP0064639B1 successfully refreshed from Google Patents.
Patent US3780412A successfully refreshed from Google Patents.
US3780412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing cylindrical components
Assignee: Adwest Engineering Ltd
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Filing: 1970-11-16
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Granted: 1973-12-25
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Expires: 1990-11-16
Abstract
Abstract A method of producing cylindrical components, particuarly cylindrical components for rotary valves or pinion members, the method comprising initially producing the component in two or more separate parts, preferably heat-treating the separately formed parts, assembling said parts and electron beam welding or friction welding the parts together to form the complete component.
Inventors
- 👤 B Millard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:34
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/12; B23K20/129; B23K15/00; B23K15/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/49412; Y10T29/49416; Y10T29/49421
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
118 words
A method of producing a component having a generally cylindrical intermediate portion having axially extending opentopped channels in a surface thereof and generally cylindrical end portions which close the axial ends of said channels, the method comprising forming a first generally cylindrical part with open-topped and open-ended axially extending channels in a cylindrical surface thereof, forming second and third generally cylindrical parts which when assembled with said first part will close the axial ends of said channels, assembling said parts with the first part between the second and third parts and with the second and third parts closing the axial ends of said channels, and electron beam welding or friction welding the parts together to form the component.
Claim 2
Independent Claim
118 words
A method of producing a component having a generally cylindrical intermediate portion having axially extending opentopped channels in a surface thereof and generally cylindrical end portions which close the axial ends of said channels, the method comprising forming a first generally cylindrical part with open-topped and open-ended axially extending channels in a cylindrical surface thereof, forming second and third generally cylindrical parts which when assembled with said first part will close the axial ends of said channels, assembling said parts with the first part between the second and third parts and with the second and third parts closing the axial ends of said channels, and electron beam welding or friction welding the parts together to form the component.
Claim 3
Dependent Claim
20 words
A method according to claim 1, which comprises heat-treating at least one of said parts prior to assembly and welding.
Claim 4
Dependent Claim
42 words
A method as claimed in claim 1 wherein the component is a cylindrical component for a rotary vAlve, the cylindrical component having spaced axially-extending channels in a surface there of which extend over a part only of the length of the component.
Claim 5
Dependent Claim
41 words
A method according to claim 3, which comprises forming said first part by broaching a tubular blank so as to form spaced axially-extending channels in the internal surface thereof, which extend over the whole of the length of the first part.
Claim 6
Dependent Claim
28 words
A method according to claim 3, which comprises forming annular grooves in the exterior surface of one or more of said parts prior to assembly of said parts.
Claim 7
Dependent Claim
74 words
A method according to claim 1 wherein said component comprises a pinion member having pinion teeth extending axially of an intermediate portion thereof and buttressed by end portions, and wherein said first part is formed by cutting channels along the full length of a short length of bar stock so as to define pinion teeth, and heat treating the so-formed first part prior to assembly and welding, said welding being by electron beam welding.
Claim 8
Dependent Claim
29 words
A method according to claim 6, which comprises clamping the assembled parts together, rotating the clamped assembled parts and electron beam welding the parts together whilst they are rotated.
Claim 9
Dependent Claim
57 words
A method according to claim 6, which comprises assembling the parts of a plurality of pinion members, clamping the assembled parts of the plurality of pinion members in a frame, rotating the assembled parts and successively passing them past electron beam welding means so that the clamped assembled parts of the different members are successively welded together.
Claim 10
Dependent Claim
18 words
A method according to claim 1, which comprises effecting said welding in a vacuum chamber under reduced pressure.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |