Patent US3858737A successfully refreshed from Google Patents.
US3858737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Excavator
Assignee: Individual
•
Filing: 1972-11-27
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Granted: 1975-01-07
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Expires: 1992-11-27
Abstract
Abstract An improved excavator which is provided with a transmitter, a receiver and antennae of a buried metal detector, being characterized in that said antennae comprise three antennae which are disposed in the bucket arm of said excavator in three dimensional perpendicular relation, and thereby the damages of buried metal facilities can be prevented.
Inventors
- 👤 Rikizo Senoo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:22
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/30; E02F3/32; E02F9/00; E02F9/24; E02F9/245; E02F9/26; G; G01; G01V; G01V3/00; G01V3/15; Y; Y10; Y10S; Y10S37/00; Y10S37/906
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
53 words
Ajn excavator having a bucket arm and which is provided with a buried metal detector including a transmitter, a receiver and an antennae, in which said antennae comprises three elements; said three elements being positioned on said bucket arm of said excavator and are disposed in three-dimensional mutually perpendicular relationship with each other.
Claim 2
Dependent Claim
53 words
Ajn excavator having a bucket arm and which is provided with a buried metal detector including a transmitter, a receiver and an antennae, in which said antennae comprises three elements; said three elements being positioned on said bucket arm of said excavator and are disposed in three-dimensional mutually perpendicular relationship with each other.
Claim 3
Dependent Claim
15 words
An excavator as defined in claim 1 in which said three elements are bar antennae.
Claim 4
Dependent Claim
35 words
An excavator as defined in claim 1 also including: means for interlocking said receiver to the driving source of said bucket arm to stop said bucket arm when a signal is received by said receiver.
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |