US4468310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum marine anode with core activator
Assignee: Sabins Industries Inc
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Filing: 1983-07-28
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Granted: 1984-08-28
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Expires: 2003-07-28
Abstract
Abstract An aluminum marine anode is constructed in association with exposed activator surfaces. The surfaces are preferably provided by casting the aluminum anode with a partially exposed core of activator material in place and suitably configurated to provide good conductive contact between the aluminum and the activator. Materials which exhibit a surface potential less negative than about -300 millivolts with respect to a silver-silver chloride half cell function as activators, copper being preferred. Aluminum alloyed with zinc and tin is the preferred anode material.
Inventors
- 👤 Rolland C. Sabins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:15
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C23F13/06; C23F13/08; C23F13/10; C23F13/18; C23F2213/00; C23F2213/30; C23F2213/31
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
123 words
Structure within an array of marine anodes connected cathodically to protect a ferrous surface exposed to brine comprising: a metallic base physically coupled to said ferrous surface including spaced, upstanding sides and a top; a tee bolt between said upstanding sides with a threaded shank extending up through said top; a non-ferrous metallic mounting pad physically coupled to said top and surrounding said threaded shank, constituting means for direct coupling to a mounting lug of a marine anode; top washer means cooperatively adapted with said mounting pad to clamp said mounting lug therebetween; and a nut for said threaded shank constituting means for pressing said top washer down towards said mounting pad and pressing said tee bolt into firm engagement with said top.
Claim 2
Dependent Claim
123 words
Structure within an array of marine anodes connected cathodically to protect a ferrous surface exposed to brine comprising: a metallic base physically coupled to said ferrous surface including spaced, upstanding sides and a top; a tee bolt between said upstanding sides with a threaded shank extending up through said top; a non-ferrous metallic mounting pad physically coupled to said top and surrounding said threaded shank, constituting means for direct coupling to a mounting lug of a marine anode; top washer means cooperatively adapted with said mounting pad to clamp said mounting lug therebetween; and a nut for said threaded shank constituting means for pressing said top washer down towards said mounting pad and pressing said tee bolt into firm engagement with said top.
Claim 3
Dependent Claim
82 words
Structure according to claim 1, including: an array of individual anodes of sacrificial metal having a surface potential measured with respect to a silver-silver chloride half cell more negative than about -1,000 millivolts in direct contact with said brine and mounted in direct coupling with said ferrous surface; each said anode including a structurally rigid core carrying a pair of mounting lugs, each of which is directly coupled to a said mounting pad by means of said tee bolt and said nut.
Claim 4
Dependent Claim
25 words
Structure according to claim 2 wherein the potential difference between the surface of said core and said sacrificial metal is at least about 200 millivolts.
Claim 5
Dependent Claim
35 words
Structure according to claim 2 wherein said core is constructed from material having a surface potential less negative than bronze on the galvanic series of potentials measured with respect to a silver-silver chloride half cell.
Claim 6
Dependent Claim
12 words
Structure according to claim 2 wherein the core is constructed from copper.
Claim 7
Dependent Claim
14 words
Structure according to claim 2 wherein said sacrificial metal comprises aluminum, zinc and tin.
Claim 8
Dependent Claim
10 words
Structure according to claim 6 wherein said core comprises copper.
Claim 9
Dependent Claim
26 words
Structure according to claim 7 wherein said sacrificial metal offers a yield in ampere hours per pound approximately equivalent to that of KA-90 marine aluminum alloy.
References Cited (Backward Citations)
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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) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |