Patent FR690785A successfully refreshed from Google Patents.
Patent US3824718A successfully refreshed from Google Patents.
US3824718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Excavator bucket with electromagnetic field weakening teeth
Assignee: Individual
•
Filing: 1973-04-02
•
Granted: 1974-07-23
•
Expires: 1993-04-02
Abstract
Abstract An excavator bucket including soil-breaking teeth mounted on the wall of the bucket, the teeth being in the form of electrodes electrically insulated from one another and electrically connected to a high-frequency generator so that each pair of adjacent teeth forms a capacitor adapted to produce an electromagnetic field reducing the mechanical strength of frozen soil, owing to dielectric heating thereof, whereby effective progress of these soil-breaking teeth into the soil is promoted. The present invention permits earth-moving jobs to be carried out under conditions of season-long and several years'' long freezing of soil, using for this purpose commonly known single-bucket excavators.
Inventors
- 👤 R Kilkeev
- 👤 L Nekrasov
- 👤 J Misnik
- 👤 Z Tsukernik
- 👤 S Kriger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:04
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/28; E02F9/2808
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
89 words
An excavator bucket, comprising a body, a pluRality of ground-breaking teeth mounted spatially adjacent to one another on said body, each one of said teeth being in the form of electrodes electrically insulated one from the other, a highfrequency generator operatively coupled to said electrodes, each adjacent pair of said ground-breaking teeth thus forming capacitors capable of producing an electromagnetic field whereby when the teeth are brought into contact with frozen ground and the like the electromagnetic field weakens the ground and allows unimpeded progress of the bucket therethrough.
Claim 2
Dependent Claim
89 words
An excavator bucket, comprising a body, a pluRality of ground-breaking teeth mounted spatially adjacent to one another on said body, each one of said teeth being in the form of electrodes electrically insulated one from the other, a highfrequency generator operatively coupled to said electrodes, each adjacent pair of said ground-breaking teeth thus forming capacitors capable of producing an electromagnetic field whereby when the teeth are brought into contact with frozen ground and the like the electromagnetic field weakens the ground and allows unimpeded progress of the bucket therethrough.
Claim 3
Dependent Claim
36 words
An excavator bucket as claimed in claim 1, wherein the adjacent ones of said ground-breaking teeth are connected to the two phases, respectively, of said high-frequency generator, symmetrically with respect to the body of the bucket.
Claim 4
Dependent Claim
73 words
An excavator bucket as claimed in claim 1, wherein each tooth of said ground-breaking teeth is mounted in a dielectric carrier supported by the body of said bucket, each adjacent pair of said ground-breaking teeth being adapted to form between and in front of themselves an electromagnetic field whereby when the teeth are brought into contact with frozen ground the electromagnetic field weakens the ground and allows unimpeded progress of the bucket therethrough.
References Cited (Backward Citations)
SU237710A1
Cited
US855389A
Cited
US2308860A
Cited
US2429412A
Cited
US2641173A
Cited
US2859952A
Cited
US2821611A
Cited
US3057985A
Cited
US3251975A
Cited
US3443051A
Cited
US3461970A
Cited
US3512284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |