Patent US4631237A successfully refreshed from Google Patents.
US4631237A
Expired / Lapsed
US
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Wire electrode for spark-eroding systems
Assignee: Berkenhoff and Co KG
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Filing: 1985-04-17
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Granted: 1986-12-23
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Expires: 2005-04-17
Abstract
Abstract A wire electrode for a spark-eroding system for erosion cutting of workpieces using intermittent electrical charges includes a core of a current-conducting material and a wire coating of a material with a lower evaporation temperature, for example zinc. The core consists of one of the following alloys according to DIN (German Industrial Standard) 17666: (a) Cu Mg 0.4; (b) Cu Fe 2P; (c) Cu Cr Zr; (d) Cu Zr.
Inventors
- 👤 Erich Dommer
- 👤 Heinrich Groos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:11
CPC Classifications
B; B23; B23H; B23H7/00; B23H7/02; B23H7/08; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12771; Y10T428/12785; Y10T428/12792; Y10T428/12861; Y10T428/12903
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
145 words
In a wire electrode for spark-eroding systems for cutting of workpieces by eroding using intermittent electrical charges, including a core of a current-conducting material and a wire coating of a material having a lower evaporation temperature, the improvement which comprises: the core consists essentially of one of the following alloys: (1) Mg 0.3-0.5% by weight Others up to 0.3% by weight Cu balance % by weight (2) Fe 2.1-2.6% by weight P 0.015-0.15% by weight Pb up to 0.03% by weight Zn 0.05-0.20% by weight Others up to 0.5% by weight Cu balance % by weight (3) Cr 0.3-1.2% by weight Zr 0.03-0.3% by weight Others up to 0.2% by weight Cu balance % by weight (4) Zr 0.1-0.3% by weight Others up to 0.2% by weight Cu balance % by weight. 2. The wire electrode according to claim 1, wherein the wire electrode is
Claim 2
Dependent Claim
21 words
coated with a second, thin, insulating, anti-friction, coating layer. 3. The wire electrode according to claim 2, wherein the insulating layer
Claim 3
Dependent Claim
11 words
is comprised of a saturated aliphatic hydrocarbon. 4. The wire electrode
Claim 4
Dependent Claim
11 words
is comprised of a saturated aliphatic hydrocarbon. 4. The wire electrode
Claim 5
Dependent Claim
159 words
according to claim 1, in which said wire coating is made of zinc. 5. In a wire electrode for spark-eroding systems for cutting of workpieces by eroding using intermittent electrical charges, including a core of a current-conducting material and a wire coating of a material having a lower evaporation temperature, the improvement which comprises: the core consists essentially of one of the following alloys: (1) Mg 0.3-0.5% by weight Others up to 0.3% by weight Cu balance % by weight (2) Fe 2.1-2.6% by weight P 0.015-0.15% by weight Pb up to 0.03% by weight Zn 0.05-0.20% by weight Others up to 0.5% by weight Cu balance % by weight (3) Cr 0.3-1.2% by weight Zr 0.03-0.3% by weight Others up to 0.2% by weight Cu balance % by weight (4) 0.1-0.3% by weight Others up to 0.2% by weight Cu balance % by weight, said alloy containing up to 0.5% by weight of at least one metal selected
Claim 6
Dependent Claim
26 words
from the group consisting of Ni, Zn and Pb. 6. The wire electrode according to claim 5, wherein the wire electrode is coated with a second,
Claim 7
Dependent Claim
21 words
thin, insulating, antifriction, coating layer. 7. The wire electrode according to claim 6, wherein the insulating layer is comprised of a
Claim 8
Dependent Claim
20 words
saturated aliphatic hydrocarbon. 8. The wire electrode according to claim 5, in which said wire coating is made of zinc.
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) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |