US3898852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ditching machines for submarine cable
Assignee: Kokusai Cable Ship KK
•
Filing: 1973-06-07
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Granted: 1975-08-12
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Expires: 1993-06-07
Abstract
Abstract A ditching machine for digging a ditch for submarine cable comprising a main body having stabilizing means which is divided into front and rear parts and jointed so as to be bendable only up and down, and a cutting bit mounted rigidly under said rear part of the main body, to prevent the entering of the head of said stabilizing means into earth and sand on the sea-bottom and to provide stable cable burying without regard to whether the layer at sea-bottom is hard or soft.
Inventors
- 👤 Takuji Ezoe
- 👤 Kikuo Shirai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:14
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/02; E02F5/10; E02F5/104; E02F5/106
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
85 words
A ditching machine comprising a main body having front and rear portions, a cutting bit mounted on said rear portion, stabilizing means mounted on the sides of the front and rear portions of said main body, and pivotal joint means having a horizontal axis for joining the rear of the front portion and the front of the rear portion of said main body, such that said rear portion moves with respect to said front portion only about the horizontal axis of the pivotal joint means.
Claim 2
Dependent Claim
85 words
A ditching machine comprising a main body having front and rear portions, a cutting bit mounted on said rear portion, stabilizing means mounted on the sides of the front and rear portions of said main body, and pivotal joint means having a horizontal axis for joining the rear of the front portion and the front of the rear portion of said main body, such that said rear portion moves with respect to said front portion only about the horizontal axis of the pivotal joint means.
Claim 3
Dependent Claim
29 words
A ditching machine according to claim 1, further comprising a press block pivotably connected to the outlet of a cable path of said rear part of said main body.
Claim 4
Dependent Claim
16 words
A ditching machine according to claim 1, wherein said stabilizing means are a pair of sledges.
Claim 5
Dependent Claim
16 words
The ditching machine of claim 1 wherein said joint means are coupled to said stabilizing means.
References Cited (Backward Citations)
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US3641780A
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US3824798A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |