US3803012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathodic protection anode clamp assembly
Assignee: American Smelting and Refining Co
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Filing: 1972-03-09
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Granted: 1974-04-09
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Expires: 1992-03-09
Abstract
Abstract A sacrificial anode clamp assembly for cathodically protecting a corrosible metallic object disposed in an electrolyte, for instance a coated ferrous metal pipe buried in the ground. The anode clamp assembly includes one or more rigid, substantially non-flexible clamp members, for example a generally C-shaped clamp member, and means securing the clamp member or members about the metal pipe. A sacrificial anode including a body of sacrificial anode metal has an electrically conductive bolt embedded at one end thereof in the sacrificial anode body, and the opposite end of the bolt, which extends outwardly from the anode body, is threaded and has a penetratable terminal end. A correspondingly threaded aperture is provided in the clamp member, and the conductive bolt having the sacrificial anode body at the one end is rotated and threaded through the threaded aperture in the clamp member until its terminal end contacts and bites into the metal of the metal object to be cathodically protected, thereby providing an electrical contact between the conductive bolt and the metal of the object to be protected. A moisture-excluding seal of electrical insulating, organic, waterinsoluble, plastic material is disposed about the locus or point of contact of the bolt terminal end with the metal object. The anode clamp assembly is eminently well suited for sacrificial cathodic protection of metallic service pipe lines and risers for natural gas and other gas and, in addition, can be utilized to cathodically protect other corrosible metal objects as is hereinafter disclosed.
Inventors
- 👤 G Kurr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:00
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44966; Y10T24/44974
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
205 words
A cathodic protection anode clamp assembly comprising a corrosible metallic object to be protected disposed in an electrolyte, clamp means positioned at least partially about the metallic object, the clamp means including at least one riGid, substantially non-flexible clamp member, and means securing the clamp member at least partially about the metallic object, a sacrificial anode including a body of sacrificial anode metal retained spaced apart from the corrosible metal object by a threaded, electrically conductive member of substantial length embedded at one end portion thereof in the sacrificial anode metal body, the opposite end portion of the conductive member being threaded and having a terminal end capable of penetrating any oxide layer on the surface of the corrosible metal object to assure electrical contact with the metal of the corrosible metal object, a correspondingly threaded hole in the clamp means, the conductive member threaded portion being threadedly engaged through the threaded hole in the clamp means with its terminal end contacting the metal of the corrosible metallic object to provide electrical contact between said conductive member and the metallic object, and a moisture-excluding seal of electrical insulating material disposed about the locus of contact of the conductive member terminal end with the metallic object.
Claim 2
Dependent Claim
205 words
A cathodic protection anode clamp assembly comprising a corrosible metallic object to be protected disposed in an electrolyte, clamp means positioned at least partially about the metallic object, the clamp means including at least one riGid, substantially non-flexible clamp member, and means securing the clamp member at least partially about the metallic object, a sacrificial anode including a body of sacrificial anode metal retained spaced apart from the corrosible metal object by a threaded, electrically conductive member of substantial length embedded at one end portion thereof in the sacrificial anode metal body, the opposite end portion of the conductive member being threaded and having a terminal end capable of penetrating any oxide layer on the surface of the corrosible metal object to assure electrical contact with the metal of the corrosible metal object, a correspondingly threaded hole in the clamp means, the conductive member threaded portion being threadedly engaged through the threaded hole in the clamp means with its terminal end contacting the metal of the corrosible metallic object to provide electrical contact between said conductive member and the metallic object, and a moisture-excluding seal of electrical insulating material disposed about the locus of contact of the conductive member terminal end with the metallic object.
Claim 3
Dependent Claim
24 words
The assembly of claim 1 wherein the threaded conductive member terminal end penetrates a material distance into the metal of the corrosible metallic object.
Claim 4
Dependent Claim
27 words
The assembly of claim 2 wherein a substantially continuous, protective coating of electrically insulating, organic, plastic material is provided on the external surface of the metallic object.
Claim 5
Dependent Claim
31 words
The assembly of claim 3 wherein the clamp member is a rigid, substantially non-flexible, generally C-shaped member, and the threaded hole is through an end portion of said generally C-shaped member.
Claim 6
Dependent Claim
86 words
The assembly of claim 4 wherein another threaded hole is in that end portion of the generally C-shaped member opposite that of the said threaded hole, and a threaded electrically conductive member having a penetratable terminal end is threadedly engaged through said another threaded hole in the C-shaped member with its terminal end penetrating the electrical insulating coating on the metallic object to contact the metal of the metallic object and provide an additional electrical contact between said threaded conductive member and the cathodic metal object.
Claim 7
Dependent Claim
138 words
The assembly of claim 3 wherein the clamp member is a rigid, substantially non-flexible, generally U-shaped member, the legs of said U-shaped member each having an outwardly flared end portion, and the securing means is a bar having a slot in one end portion thereof, a slot in the opposite end portion thereof, and the threaded hole is through a portion of the bar intermediate the slots, one of said slots extending inwardly of the bar a substantial distance from a side edge thereof and the other slot extending inwardly of the bar a substantial distance from a side edge thereof at the opposite side of the bar, the outwardly flared end portions of the U-shaped member legs engaging the slots in the bar opposite end portions whereby the clamp member is secured about the cathodic metal object.
Claim 8
Dependent Claim
108 words
The assembly of claim 3 wherein the clamp member is a rigid, substantially non-flexible, generally U-shaped member, the legs of said U-shaped member each having an externally threaded, non-flared end portion, and the securing means is a bar having an aperture in one end portion thereof, an aperture in the opposite end portion thereof, and the threaded hole is through a portion of the bar intermediate the apertures, the threaded, non-flared end portions of the U-shaped member legs extending through the apertures in the bar opposite end portions, and nuts threadedly engaging the threaded end portions of the legs whereby the clamp is secured about the metallic object.
Claim 9
Dependent Claim
143 words
The assembly of claim 3 wherein the clamp member is a rigid, substantially non-flexible, generally U-shaped member, the legs of said U-shaped member each having an externally threaded, non-flared end portion, and the securing means is a bar having a slot in one eNd portion thereof, a slot in the opposite end portion thereof, and the threaded hole is through a portion of the bar intermediate the slots, one of said slots extending inwardly of the bar a substantial distance from a side edge thereof and the other slot extending inwardly of the bar a substantial distance from an end edge thereof, the threaded, non-flared end portions of the U-shaped member legs extending through the slots in the bar opposite end portions, and nuts threadedly engaging the threaded end portions of the legs whereby the clamp member is secured about the metallic object.
Claim 10
Dependent Claim
124 words
The assembly of claim 4 wherein the clamp member is a rigid, substantially non-flexible, generally U-shaped member, the legs of said U-shaped member each having an externally threaded nonflared end portion, and the securing means is a bar having a slot in one end edge thereof, another slot in an opposite end edge thereof, and the threaded hole is through a portion of the bar intermediate the slots, each slot extending inwardly of the bar a substantial distance from the end edge thereof, the threaded non-flared end portions of the U-shaped member legs extending through the slots in the bar opposite end portions, and nuts threadedly engaging the threaded end portions of the legs whereby the clamp member is secured about the metallic object.
Claim 11
Dependent Claim
38 words
The assembly of claim 3 wherein the clamp member is a rigid, substantially non-flexible, generally U-shaped member, and the threaded hole is through a substantially horizontal portion of the generally U-shaped member intermediate the ends of its legs.
Claim 12
Dependent Claim
14 words
The assembly of claim 1 wherein the threaded electrically conductive member is a bolt.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |