Patent US4325261A successfully refreshed from Google Patents.
Patent US5245153A successfully refreshed from Google Patents.
US5245153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Depositing metal onto a surface
Assignee: KSU INSTITUTE FOR COMMERCIALIZATION
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Filing: 1990-01-12
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Granted: 1993-09-14
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Expires: 2010-01-12
Abstract
Abstract In order to deposit metal onto a surface such as a cylindrical surface, an arc spraying method is used with a consumable electrode (16), a non-consumable electrode (18) and a jet of atomising gas (22) blown through the arc (20) in a radial direction to propel the molten metal of the consumable electrode from the acr to the cylinder wall (12). The non-consumable electrode and the atomising gas jet both rotate about the cylinder axis so that the entire surface can be covered. The supply for the consumable electrode will normally come from a reel which can be stationary such that the consumable electrode does not rotate about its own axis.
Inventors
- 👤 Alfred R. E. Singer
- 👤 Gordon I. Davies
- 👤 Allen D. Roche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:09
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/12; C23C4/14; C23C4/16; B; B05; B05B; B05B13/00; B05B13/06; B05B13/0627; B05B13/0636; B05B7/00; B05B7/16; B05B7/22; B05B7/222; B05B7/224
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
116 words
A method of annularly thermal spraying a material onto an internal cylindrical surface of a narrow cavity having a geometrical first axis, using an arc spraying process with a consumable electrode and a non-consumable electrode, wherein the non-consumable electrode rotates about a second axis as well as linearly adjusts along such second axis, said second axis being parallel to said first axis, the consumable electrode is fed into and maintained in arc striking distance from the non-consumable electrode, an arc is struck between the electrodes, and atomising gas is directed through the arc and across said first axis to atomise molten material in the arc and to carry it towards and deposit it on the surface.
Claim 2
Independent Claim
116 words
A method of annularly thermal spraying a material onto an internal cylindrical surface of a narrow cavity having a geometrical first axis, using an arc spraying process with a consumable electrode and a non-consumable electrode, wherein the non-consumable electrode rotates about a second axis as well as linearly adjusts along such second axis, said second axis being parallel to said first axis, the consumable electrode is fed into and maintained in arc striking distance from the non-consumable electrode, an arc is struck between the electrodes, and atomising gas is directed through the arc and across said first axis to atomise molten material in the arc and to carry it towards and deposit it on the surface.
Claim 3
Dependent Claim
50 words
A method as claimed in claim 1, wherein said atomizing gas is directed along the non-consumable electrode, and (ii) the non-consumable electrode describes a circle when it rotates about the first axis and the consumable electrode is fed axially into the interior of the circle described by the non-consumable electrode.
Claim 4
Dependent Claim
29 words
A method as claimed in claim 1, wherein the non-consumable electrode rotates about the consumable electrode and forms an included angle with said consumable electrode of 45° or 180°.
Claim 5
Dependent Claim
25 words
A method as claimed in claim 1, wherein the consumable electrode lies on the first axis whilst the non-consumable electrode rotates around the first axis.
Claim 6
Dependent Claim
26 words
A method as claimed in claim 1, wherein an additive is introduced into the atomised molten metal before the atomised metal is deposited on the surface.
Claim 7
Dependent Claim
21 words
The method as in claim 1, in which said narrow cavity is a cylinder bore of an internal combustion engine block.
Claim 8
Dependent Claim
121 words
Apparatus for thermally spraying a material onto an internal cylindrical surface of a narrow cavity having a geometrical first axis using an arc spraying process, the apparatus comprising a consumable electrode, a non-consumable electrode, means mounting the non-consumable electrode for rotation about a second axis as well as linearly adjustable along said second axis, said second axis being parallel to said first axis, a feed mechanism for feeding the consumable electrode in a direction generally parallel to the first axis but without rotation about its own axis, means for striking and maintaining an arc between the electrodes, and means for directing atomising gas through the arc and across said first axis to carry molten material toward and deposit on said surface.
Claim 9
Dependent Claim
121 words
Apparatus for thermally spraying a material onto an internal cylindrical surface of a narrow cavity having a geometrical first axis using an arc spraying process, the apparatus comprising a consumable electrode, a non-consumable electrode, means mounting the non-consumable electrode for rotation about a second axis as well as linearly adjustable along said second axis, said second axis being parallel to said first axis, a feed mechanism for feeding the consumable electrode in a direction generally parallel to the first axis but without rotation about its own axis, means for striking and maintaining an arc between the electrodes, and means for directing atomising gas through the arc and across said first axis to carry molten material toward and deposit on said surface.
Claim 10
Dependent Claim
18 words
Apparatus as claimed in claim 7, wherein the non-consumable electrode is mounted for rotation about the consumable electrode.
Claim 11
Dependent Claim
31 words
Apparatus as claimed in claim 7, wherein the non-consumable electrode describes a circle as it rotates about the first axis, and the feed mechanism feeds the consumable electrode within the circle.
Claim 12
Dependent Claim
12 words
Apparatus as claimed claim 7, wherein the non-consumable electrode is of tungsten.
Claim 13
Dependent Claim
69 words
Apparatus as claimed in claim 7, wherein the non-consumable electrode is mounted in a head and is directed towards the first axis of the surface, the head being mounted for rotation such that the electrode maintains its direction towards the first axis as it rotates, and the atomizing gas being directed along the non-consumable electrode to reduce stray arcing and enhance inherent ionization of the gas by the arc.
Claim 14
Dependent Claim
23 words
Apparatus as claimed in claim 11 wherein the head includes gas passages for directing the atomising gas through the arc towards the surface.
Claim 15
Dependent Claim
23 words
Apparatus as claimed claim 7 including means for feeding particulate material into the atomised metal before the metal is deposited on the surface.
Claim 16
Dependent Claim
23 words
Apparatus as claimed in claim 13 wherein the head also includes passages for directing a gas with entrained particulate additives towards the surface.
Claim 17
Dependent Claim
16 words
Apparatus as claimed in claim 7, wherein both electrodes are axially movable relative to the surface.
Claim 18
Dependent Claim
19 words
Apparatus as claimed in claim 15, wherein the wire for the consumable electrode is drawn from a stationary spool.
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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) | 1996-09-13 | 1997-03-15 | 1997-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-13 | 2001-03-15 | 2001-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-13 | 2005-03-15 | 2005-09-14 | $7700.00 | Window Closed / Lapsed |