US3638432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stationary dredging apparatus
Assignee: Individual
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Filing: 1969-04-28
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Granted: 1972-02-01
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Expires: 1989-04-28
Abstract
Abstract This application discloses apparatus for removing sand and other sedimentary materials from waterways and other submerged locations comprising a generally horizontal perforated pipe extending across the bottom of the waterway and connected to a suction pump above the water level with a high-volume clear water supply conduit entering the perforated conduit near the perforations closest to the pump. The clear water supply may be provided by a suction apparatus or a pressure apparatus, and where the perforations are provided in the bottom of the perforated pipe, the pipe may dig its own channel in the bottom of a waterway.
Inventors
- 👤 Townsend L Schoonmaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:15
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/8808; E02B; E02B3/00; E02B3/02; E02B3/023; Y; Y02; Y02A; Y02A10/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
155 words
Apparatus for removing sediment submerged in water which comprises: A. a stationary dredging conduit submerged under a body of water near the bottom thereof with said conduit having lateral passageway means opening into said conduit with said passageway means distributed along the length of said conduit; B. a pump having an intake opening; C. a connecting conduit connected to said dredging conduit and extending therefrom to the intake opening of said pump; and D. water supply means for introducing clear water into said conduits at a location between said lateral passageway means and said pump below the water level in said body of water adjacent that part of said lateral passageway mEans in said dredging conduit which is closest to said connecting conduit with said water supply means having a capacity for introducing water at said location which is greater than 20 percent of the capacity of said pump to pump water through said conduits.
Claim 2
Dependent Claim
155 words
Apparatus for removing sediment submerged in water which comprises: A. a stationary dredging conduit submerged under a body of water near the bottom thereof with said conduit having lateral passageway means opening into said conduit with said passageway means distributed along the length of said conduit; B. a pump having an intake opening; C. a connecting conduit connected to said dredging conduit and extending therefrom to the intake opening of said pump; and D. water supply means for introducing clear water into said conduits at a location between said lateral passageway means and said pump below the water level in said body of water adjacent that part of said lateral passageway mEans in said dredging conduit which is closest to said connecting conduit with said water supply means having a capacity for introducing water at said location which is greater than 20 percent of the capacity of said pump to pump water through said conduits.
Claim 3
Dependent Claim
37 words
The apparatus of claim 1 in which said water supply means comprises means for introducing clear water at said location in said conduits in an amount of at least 50 percent of the capacity of said pump.
Claim 4
Dependent Claim
46 words
The apparatus of claim 1 in which said water supply means comprises means including a valve for introducing clear water at said location in said conduits in an amount which is at least 100 percent of the capacity of said pump when said valve is open.
Claim 5
Dependent Claim
37 words
The apparatus of claim 1 in which said water supply means comprises a suction pipe extending from said conduits to a location in said body of water above the bottom thereof and below the water level thereof.
Claim 6
Dependent Claim
51 words
The apparatus of claim 1 in which said water supply means comprises a pipe extending from said conduits at said location, a pump having a discharge opening connected to said pipe and an intake opening communicating with said body of water above the bottom thereof and below the water level thereof.
Claim 7
Dependent Claim
35 words
The apparatus of claim 1 characterized further in that said lateral passageway means are located above the bottom of said dredging conduit for removing from said body of water sand which approaches said dredging conduit.
Claim 8
Dependent Claim
51 words
The apparatus of claim 1 characterized further in that said lateral passageway means are located in the bottom of said dredging conduit for removing sand from underneath said dredging conduit and causing said dredging conduit to sink into the bottom of said body of water responsive to operation of said pump.
Claim 9
Dependent Claim
124 words
Apparatus for preventing sand intrusion into a waterway which comprises: A. a dredging conduit in said waterway adjacent to the bottom thereof with said conduit having lateral passageway means opening into said conduit adjacent to the top thereof with said passageway means distributed along the length of said conduit; B. an upwardly extending conduit connected to said dredging conduit and extending upwardly therefrom; C. a pump having an intake opening connected to said upwardly extending conduit; and, D. a suction conduit extending from a first location below the water level in said waterway substantially above the bottom of said waterway to said conduits at a second location adjacent to that part of said lateral passageway means which is closest to said upwardly extending conduit.
Claim 10
Dependent Claim
124 words
Apparatus for preventing sand intrusion into a waterway which comprises: A. a dredging conduit in said waterway adjacent to the bottom thereof with said conduit having lateral passageway means opening into said conduit adjacent to the top thereof with said passageway means distributed along the length of said conduit; B. an upwardly extending conduit connected to said dredging conduit and extending upwardly therefrom; C. a pump having an intake opening connected to said upwardly extending conduit; and, D. a suction conduit extending from a first location below the water level in said waterway substantially above the bottom of said waterway to said conduits at a second location adjacent to that part of said lateral passageway means which is closest to said upwardly extending conduit.
Claim 11
Dependent Claim
43 words
The apparatus of claim 8 characterized further in that said suction conduit extends from said first location to a position above said water level and hence to said second position, and a valve is mounted in said suction conduit above the water level.
Claim 12
Dependent Claim
29 words
The apparatus of claim 8 characterized further in that said suction conduit has a diameter at least 50 percent as large as the diameter of said upwardly extending conduit.
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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |