Patent US3592994A successfully refreshed from Google Patents.
US3592994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spot-welding apparatus
Assignee: Duracell Inc USA
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Filing: 1969-07-25
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Granted: 1971-07-13
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Expires: 1989-07-25
Abstract
Abstract A spot-welding electrode having a tip with a flat operative contact face and an annular recess surrounding the contact face. The portion of the electrode body which extends beyond the recess is chamfered or tapered away from the contact face. The annular insert is force fit into the recess and extends into the electrode body from the periphery of the contact face. The outer end of the insert provides a flat annular zone which surrounds the contact face and is flush with it so as to constitute essentially a peripheral reinforced flat extension of the face. The insert is formed of a conductive material having greater strength and resistance to deformation under welding conditions than the material forming the contact face. The outer end of the insert is chamfered or tapered beyond the flat annular zone so as to coincide with the chamfer or tapered in the electrode body.
Inventors
- 👤 Leslie A Ford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:40
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/30; B23K11/3009; B23K35/00; B23K35/02; B23K35/0205
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
151 words
A spot-welding electrode comprising an electrode body having a tip with a flat operative contact face and an annular recess surrounding said contact face with the portion of said body extending beyond said recess being chamfered or tapered away from said contact face, a reinforcing member comprising an annular insert force fit into said recess and extending into the electrode body from the periphery of the contact face, the outer end of said insert providing a flat annular zone surrounding said face and flush therewith so as to constitute essentially a peripheral reinforced flat extension of the face, said insert being formed of a conductive material having greater strength and resistance to deformation under welding conditions than the material forming said contact face, the outer end of the insert being chamfered or tapered beyond said flat annular zone so as to coincide with the chamfer or taper in said electrode body.
Claim 2
Dependent Claim
151 words
A spot-welding electrode comprising an electrode body having a tip with a flat operative contact face and an annular recess surrounding said contact face with the portion of said body extending beyond said recess being chamfered or tapered away from said contact face, a reinforcing member comprising an annular insert force fit into said recess and extending into the electrode body from the periphery of the contact face, the outer end of said insert providing a flat annular zone surrounding said face and flush therewith so as to constitute essentially a peripheral reinforced flat extension of the face, said insert being formed of a conductive material having greater strength and resistance to deformation under welding conditions than the material forming said contact face, the outer end of the insert being chamfered or tapered beyond said flat annular zone so as to coincide with the chamfer or taper in said electrode body.
Claim 3
Dependent Claim
25 words
An electrode according to claim 1 wherein the insert consists of a metallic material having an electrical conductivity of not less than 27 percent I.A.C.S.
Claim 4
Dependent Claim
22 words
An electrode according to claim 1 wherein the reinforcing member comprises a plurality of rods or strips arranged in circular tube formation.
Claim 5
Dependent Claim
22 words
An electrode according to claim 1 wherein the reinforcing member comprises a plurality of rods or strips arranged in tapered tube formation.
Claim 6
Dependent Claim
12 words
An electrode according to claim 1 wherein the reinforcing member is helical.
Claim 7
Dependent Claim
37 words
An electrode according to claim 1 wherein the reinforcing member is formed of a sintered mass of tungsten particles with the interstices between them filled with copper and the body of the electrode is a copper-chromium alloy.
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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |