US3591936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submarine cutter dredger
Assignee: KONINKL MIJ TOT HET UITVOEREN
•
Filing: 1969-01-15
•
Granted: 1971-07-13
•
Expires: 1989-01-15
Abstract
Abstract A submersible dredge including a dome-shaped body to rest on the bottom of a waterway and having a vertical air shaft to atmosphere. The dome is formed in part by a rotatable annular mounting to which one end of a ladder is pivotally mounted, and on the other end of the ladder is a soil digging tool forward of one end of a suction tube. A driving motor for the tool is mounted on the ladder at the tool, above the inlet end of the suction tube, the latter being connected to a pump within the body. Two oppositely disposed sets of legs are provided to propel the dredge on the bottom of a waterway, the sets being operated alternately and each comprising three legs including one pair which are vertically movable and horizontally shiftable together, the other leg being in effect a prop.
Inventors
- 👤 Wouter Van Guens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:37
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/90; E02F3/905; E02F9/00; E02F9/02; E02F9/04; E02F9/045
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
196 words
In a dredge, a submersible dome-shaped body to rest on the bottom of a waterway, a hollow shaft mounted on said body and extending upwardly therefrom to atmosphere in a waterway of a depth less than the height of said shaft, a ladder pivotally mounted on said body to rotate in two directions, a rotary soil loosening tool mounted on said ladder, drive means operable to rotate said tool, a suction pump within said body having an intake and an outlet, a suction tube connected at one end thereof to the intake of said pump and having an inlet affixed to said ladder adjacent said cutting tool, two sets of oppositely disposed vertically retractable propelling means within said body at the bottom thereof, each of said sets of propelling means including a pair of vertically and horizontally shiftable legs and an intermediate and separately vertically shiftable leg between said pair of vertically and horizontally shiftable legs and hydraulic means for each set of legs operable to shift the pair of one set and the intermediate leg of the other set alternately with the pair of said other set and the intermediate leg of said one set.
Claim 2
Dependent Claim
196 words
In a dredge, a submersible dome-shaped body to rest on the bottom of a waterway, a hollow shaft mounted on said body and extending upwardly therefrom to atmosphere in a waterway of a depth less than the height of said shaft, a ladder pivotally mounted on said body to rotate in two directions, a rotary soil loosening tool mounted on said ladder, drive means operable to rotate said tool, a suction pump within said body having an intake and an outlet, a suction tube connected at one end thereof to the intake of said pump and having an inlet affixed to said ladder adjacent said cutting tool, two sets of oppositely disposed vertically retractable propelling means within said body at the bottom thereof, each of said sets of propelling means including a pair of vertically and horizontally shiftable legs and an intermediate and separately vertically shiftable leg between said pair of vertically and horizontally shiftable legs and hydraulic means for each set of legs operable to shift the pair of one set and the intermediate leg of the other set alternately with the pair of said other set and the intermediate leg of said one set.
Claim 3
Dependent Claim
22 words
In a dredge as defined by claim 9 wherein said dome-shaped body includes a rotatable annular support for pivotally mounting said ladder.
Claim 4
Dependent Claim
24 words
In a dredger as defined by claim 1 wherein the length of said ladder is substantially equal to the height of said hollow shaft.
Claim 5
Dependent Claim
31 words
In a dredge as defined by claim 1 wherein said drive means is a motor mounted on said ladder at said tool and above the inlet end of said suction tube.
References Cited (Backward Citations)
US1313838A
Cited
US687830A
Cited
US813935A
Cited
US1408498A
Cited
FR997304A
Cited
US2691272A
Cited
US2924946A
Cited
US2861430A
Cited
US3003454A
Cited
US3103790A
Cited
US3218739A
Cited
GB994628A
Cited
US3456371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |