US3566000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grounding rod
Assignee: Allegheny Ludlum Corp
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Filing: 1969-06-20
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Granted: 1971-02-23
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Expires: 1989-06-20
Abstract
Abstract Described herein is a grounding rod and method of using it. The grounding rod comprises a rigidized thin-walled tube of a corrosion-resistant steel and a core of a plastic-type filler within the tube, the core being sufficiently rigid to provide structural support to the thin-walled tube yet resilient enough to allow some bending of the rod to circumvent obstructions encountered in driving the rod into the ground. The plastic filler is a material substantially nonreactive with the tube or the earth environment of the rod''s location. The rod is pointed on one end to facilitate driving into the ground and has an anvil on the other end to distribute forces and minimize distortion while the rod is driven into the ground.
Inventors
- 👤 Jack R Maurer
- 👤 Frank J Haynes
- 👤 Harrison Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:00
CPC Classifications
H; H01; H01R; H01R4/00; H01R4/58; H01R4/66
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
87 words
An electrical grounding rod for driving into the earth comprising a thin-walled tube of corrosion-resistant steel and a core of resilient material inert with said earth environment substantially coterminus with the inside of said tube, means on said rod for attaching a grounding conductor to said rod, directing means on one end of said rod to facilitate driving said rod and circumventing obstructions in the earth, said core and thin-walled tube being sufficiently rigid to be driven into the ground and sufficiently resilient to circumvent said obstructions.
Claim 2
Dependent Claim
87 words
An electrical grounding rod for driving into the earth comprising a thin-walled tube of corrosion-resistant steel and a core of resilient material inert with said earth environment substantially coterminus with the inside of said tube, means on said rod for attaching a grounding conductor to said rod, directing means on one end of said rod to facilitate driving said rod and circumventing obstructions in the earth, said core and thin-walled tube being sufficiently rigid to be driven into the ground and sufficiently resilient to circumvent said obstructions.
Claim 3
Dependent Claim
12 words
An article according to claim 1 wherein said core is under compression.
Claim 4
Dependent Claim
25 words
An article according to claim 2 wherein said core is formed of a material of the group of high molecular weight compounds known as plastics.
Claim 5
Dependent Claim
12 words
An article according to claim 1 wherein said tube is stainless steel.
Claim 6
Dependent Claim
33 words
An article according to claim 4 including anvil means on the other end of said rod to uniformly distribute forces and minimize distortion is said rod during driving said rod into the earth.
Claim 7
Dependent Claim
24 words
An article according to claim 5 wherein said anvil means is detachable from said rod after driving and is reusable on another ground rod.
Claim 8
Dependent Claim
20 words
An article according to claim 4 wherein said directing means includes an end on said rod of progressively reduced diameter.
Claim 9
Dependent Claim
27 words
An article according to claim 7 wherein said directing means is a separate end having a hardness greater than earth affixed to one end of said rod.
Claim 10
Dependent Claim
14 words
An article according to claim 7 wherein said directing means includes a rounded end.
Claim 11
Dependent Claim
18 words
An article according to claim 9 wherein said core protrudes from said end to form said rounded end.
Claim 12
Dependent Claim
24 words
An article according to claim 4 wherein said core is a flowable plastic of the group of materials expandable and hardenable within said core.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |