Patent US4667436A successfully refreshed from Google Patents.
US4667436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus for eradicating fire ants
Assignee: YAARD-VARK Corp
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Filing: 1985-08-02
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Granted: 1987-05-26
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Expires: 2005-08-02
Abstract
Abstract An apparatus powered by an electric alternating current source comprising an insulator having the upper end of a spike mounted therein and two wires wrapped about the insulator forming a double helical coil. The two wires have a voltage of about 1000-1500 volts placed across them to electrocute fire ants upon contact. The spike is inserted into the ground thus supporting the apparatus in an upright position.
Inventors
- 👤 James A. Benson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:42
CPC Classifications
A; A01; A01M; A01M17/00; A01K; A01K79/00; A01K79/02; A01M1/00; A01M1/22; A01M1/223; A01M2200/00; A01M2200/01; A01M2200/011
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
244 words
An apparatus connected to an alternating current electric power source at about 60 cycles per second for eradicating ants in an anthill, comprising: a spike for being inserted into an anthill to support the apparatus adjacent to the hill: an insulator having the upper end of said spike mounted therein; a first wire wrapped about said insulator to form spaced apart coils on the surface of said insulator; said second a second wire wrapped about said insulator to form spaced apart coils on the surface of said insulator, said second wire being spaced-apart from and between the coils of said first wire to form a double helical coil; a transformer having an input and an output for producing a voltage gain between the input and output, said output being connected to said first and second wires to place a potential difference across said wires; means for connecting the input of said transformer to the power source; the voltage gain of said transofrmer being sized to place a voltage of between about 1000 and about 1500 volts across said first and second wires to electrocute and fire ant that crawls across and bridges between said first and second wires and cause the ants to being attaching and killing each other and to drive the survivors out of the area; and a said first and second wires being supported by said insulator and spike such that no substantial electrical energy is directly conducted into the anthill.
Claim 2
Independent Claim
244 words
An apparatus connected to an alternating current electric power source at about 60 cycles per second for eradicating ants in an anthill, comprising: a spike for being inserted into an anthill to support the apparatus adjacent to the hill: an insulator having the upper end of said spike mounted therein; a first wire wrapped about said insulator to form spaced apart coils on the surface of said insulator; said second a second wire wrapped about said insulator to form spaced apart coils on the surface of said insulator, said second wire being spaced-apart from and between the coils of said first wire to form a double helical coil; a transformer having an input and an output for producing a voltage gain between the input and output, said output being connected to said first and second wires to place a potential difference across said wires; means for connecting the input of said transformer to the power source; the voltage gain of said transofrmer being sized to place a voltage of between about 1000 and about 1500 volts across said first and second wires to electrocute and fire ant that crawls across and bridges between said first and second wires and cause the ants to being attaching and killing each other and to drive the survivors out of the area; and a said first and second wires being supported by said insulator and spike such that no substantial electrical energy is directly conducted into the anthill.
Claim 3
Dependent Claim
25 words
The apparatus of claim 1 wherein the spacing between the coils of said first and second wires is between about 1/16 and about 1/8 inch.
Claim 4
Dependent Claim
21 words
The apparatus of claim 1 wherein said transformer is enclosed in a housing above said insulator and supported by said spike.
Claim 5
Dependent Claim
28 words
The apparatus of claim 3 further comprising a handle secured to said housing for applying pressure to the apparatus to insert and remove the spike from the ground.
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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) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |