Patent US4008845A successfully refreshed from Google Patents.
US4008845A
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Method of positive and non-positive cold-joining
Assignee: Bleckman & Co
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Filing: 1974-07-11
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Granted: 1977-02-22
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Expires: 1994-07-11
Abstract
Abstract A method of joining metal sheets together or to shaped bodies, e.g., electric tubular heating elements, wherein use is made of an insert in the form of wire coils, profiled strips, wires or balls which are pressed into the material of the parts which are to be joined together.
Inventors
- 👤 Richard Bleckmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:01
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/02; B23K20/021; B21; B21D; B21D39/00; B21D39/03; B21D51/00; B21D51/16; B21D51/26; B21D51/2676; B21D51/38; B21D51/383; B21D51/386; B23K20/22; B23K20/233; B23K20/2333; F; F16; F16B; F16B11/00; F16B11/002; B23P; B23P2700/00; B23P2700/05; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49936
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
110 words
A method of joining a metallic first member to another metallic planar sheet member comprising the steps of providing a metallic first member and a metallic planar sheet member, providing at least one wire coil of metallic material having a hardness greater than the hardness of said sheet member, securing said wire coil to said first member, moving said metallic members together with at least a portion of said wire coil therebetween, compressing said metallic members into overlying, flush engagement to enclose said at least a portion of said wire coil with the material of said sheet member and thereby cold-join said metallic members together in a securely bonded relationship.
Claim 2
Independent Claim
110 words
A method of joining a metallic first member to another metallic planar sheet member comprising the steps of providing a metallic first member and a metallic planar sheet member, providing at least one wire coil of metallic material having a hardness greater than the hardness of said sheet member, securing said wire coil to said first member, moving said metallic members together with at least a portion of said wire coil therebetween, compressing said metallic members into overlying, flush engagement to enclose said at least a portion of said wire coil with the material of said sheet member and thereby cold-join said metallic members together in a securely bonded relationship.
Claim 3
Dependent Claim
24 words
A method in accordance with claim 1 wherein said first member comprises a tubular heater and wherein said wire coil surrounds said first member.
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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) | 1980-02-22 | 1980-08-23 | 1981-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-22 | 1984-08-23 | 1985-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-22 | 1988-08-23 | 1989-02-22 | $7700.00 | Window Closed / Lapsed |