Patent US5909982A successfully refreshed from Google Patents.
US5909982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Large-depth underground drainage facility and method of running same
Assignee: Hitachi Ltd
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Filing: 1997-03-20
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Granted: 1999-06-08
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Expires: 2017-03-20
Abstract
Abstract An underground water channel is provided in an underground of a large depth, and rain water and the like flow into this underground channel from flood control channels, conduits and rivers through vertical shafts. A pump well of a pump station is connected to a downstream end of the underground channel, and water flowing into the pump well is discharged by a pump to a discharge tank. The pump is disposed generally at a medium water level of the underground channel, and a lowest water level L.W.L enabling draining is the medium water level of the underground channel. In an open channel flow operation of an open channel-closed channel mixed flow operation, water level of the underground channel is maintained at the lowest water level L.W.L, so that the underground channel is in an open channel condition. In the closed channel flow operation, the underground channel is fully filled with water, and further water level rises into the vertical shafts, so that the underground channel is in a closed channel condition. By changing an outflow factor in accordance with rainfall patterns, the rate of flow into the vertical shafts can be accurately estimated, so that the large-depth underground drainage facility can be run in a stable manner.
Inventors
- 👤 Kunio Takada
- 👤 Kenji Otani
- 👤 Masayuki Yamada
- 👤 Saburo Maru
- 👤 Sumio Sudo
- 👤 Sadashi Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:41
CPC Classifications
E; E02; E02B; E02B11/00; E03; E03F; E03F1/00; E03F5/00; E03F5/22; F; F04; F04D; F04D15/00; F04D15/0072; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/445; F04D29/448; F04D29/60; F04D29/605; F05; F05B; F05B2260/00; F05B2260/96; F05C; F05C2225/00; F05C2225/08; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y10; Y10T; Y10T137/00; Y10T137/402
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
143 words
A large-depth underground drainage facility comprising an underground water channel in an underground location at a great depth and into which drain water flows from drainage channels; a vertical water channel; a pumping tank, the bottom of said pumping tank being above the depth of said underground water channel and communicating through said vertical water channel with a downstream end of said underground water channel; a vertical discharge channel having an outlet near the ground surface; and a drainage pump for drawing water from said pumping tank and pumping the drawn water through said vertical discharge channel to said outlet, said drainage pump being disposed at substantially the level of said bottom of said pumping tank and having a pump suction port communicating with said pumping tank and disposed to pump water from substantially the level of the bottom of said pumping tank.
Claim 2
Dependent Claim
143 words
A large-depth underground drainage facility comprising an underground water channel in an underground location at a great depth and into which drain water flows from drainage channels; a vertical water channel; a pumping tank, the bottom of said pumping tank being above the depth of said underground water channel and communicating through said vertical water channel with a downstream end of said underground water channel; a vertical discharge channel having an outlet near the ground surface; and a drainage pump for drawing water from said pumping tank and pumping the drawn water through said vertical discharge channel to said outlet, said drainage pump being disposed at substantially the level of said bottom of said pumping tank and having a pump suction port communicating with said pumping tank and disposed to pump water from substantially the level of the bottom of said pumping tank.
Claim 3
Dependent Claim
59 words
A drainage pump having an impeller disposed between a top surface of a downstream end of an underground water channel provided in an underground location and the ground surface; and a suction port communicating with a pumping tank disposed above the depth of the underground water channel and in communication with the downstream end of the underground water channel.
Claim 4
Dependent Claim
59 words
A drainage pump having an impeller disposed between a top surface of a downstream end of an underground water channel provided in an underground location and the ground surface; and a suction port communicating with a pumping tank disposed above the depth of the underground water channel and in communication with the downstream end of the underground water channel.
Claim 5
Dependent Claim
19 words
A drainage pump as claimed in claim 2, wherein the underground water channel is at a great depth underground.
Claim 6
Dependent Claim
87 words
A drainage system comprising an underground water channel provided in an underground location beneath a ground surface, the underground water channel having a downstream end with a top surface; a pumping tank communicating with the downstream end of the underground water channel and having a bottom surface above the depth of the underground water channel; and a drainage pump disposed between the top surface of the downstream end of the underground water channel and the ground surface and having a suction port communicating with the pumping tank.
Claim 7
Dependent Claim
87 words
A drainage system comprising an underground water channel provided in an underground location beneath a ground surface, the underground water channel having a downstream end with a top surface; a pumping tank communicating with the downstream end of the underground water channel and having a bottom surface above the depth of the underground water channel; and a drainage pump disposed between the top surface of the downstream end of the underground water channel and the ground surface and having a suction port communicating with the pumping tank.
Claim 8
Dependent Claim
20 words
A drainage water system as claimed in claim 4, wherein the underground water channel is at a great depth underground.
Claim 9
Dependent Claim
93 words
A drainage water system comprising an underground water channel provided in an underground location; a pumping tank disposed above the depth of the underground water channel; a vertical water channel connecting the pumping tank to the underground water channel for providing water from the underground water channel to the pumping tank; and a pump for pumping water from the pumping tank to a discharge location near the ground surface, the pump being disposed at a level adjacent the bottom of the pumping tank and having a suction port communicating with the pumping tank.
Claim 10
Dependent Claim
93 words
A drainage water system comprising an underground water channel provided in an underground location; a pumping tank disposed above the depth of the underground water channel; a vertical water channel connecting the pumping tank to the underground water channel for providing water from the underground water channel to the pumping tank; and a pump for pumping water from the pumping tank to a discharge location near the ground surface, the pump being disposed at a level adjacent the bottom of the pumping tank and having a suction port communicating with the pumping tank.
Claim 11
Dependent Claim
20 words
A drainage water system as claimed in claim 6, wherein the underground water channel is at a great depth underground.
Claim 12
Dependent Claim
84 words
A drainage water system comprising an underground water channel provided in an underground location, the water channel having a downstream end with a top surface; a pumping tank disposed above the depth of the underground water channel and communicating with the downstream end of the water channel, the pumping tank having a bottom level disposed between the top surface of the downstream end of the underground water channel and the ground surface; and a pump having a suction port communicating with the pumping tank.
Claim 13
Dependent Claim
84 words
A drainage water system comprising an underground water channel provided in an underground location, the water channel having a downstream end with a top surface; a pumping tank disposed above the depth of the underground water channel and communicating with the downstream end of the water channel, the pumping tank having a bottom level disposed between the top surface of the downstream end of the underground water channel and the ground surface; and a pump having a suction port communicating with the pumping tank.
Claim 14
Dependent Claim
20 words
A drainage water system as claimed in claim 8, wherein the underground water channel is at a great depth underground.
Claim 15
Dependent Claim
84 words
A drainage water system comprising an underground water channel provided in an underground location, the water channel having a deep downstream end with a top surface; a pumping tank disposed at a level above the underground water channel and communicating with the downstream end of the underground water channel; and a pump having a suction port at a level between the top surface of the downstream end of the underground water channel and the ground surface, the suction port communicating with the pumping tank.
Claim 16
Dependent Claim
84 words
A drainage water system comprising an underground water channel provided in an underground location, the water channel having a deep downstream end with a top surface; a pumping tank disposed at a level above the underground water channel and communicating with the downstream end of the underground water channel; and a pump having a suction port at a level between the top surface of the downstream end of the underground water channel and the ground surface, the suction port communicating with the pumping tank.
Claim 17
Dependent Claim
20 words
A drainage water system as claimed in claim 10, wherein the underground water channel is at a great depth underground.
Claim 18
Dependent Claim
107 words
A drainage water system comprising an underground water channel in an underground location, the water channel having a deep downstream end with a top surface; a pumping tank disposed at a level above the underground water channel and communicating with the downstream end of the underground water channel, the pumping tank having a bottom level between the level of the top surface of the downstream end and the ground surface; and a pump having a suction port disposed at a level between the top surface of the downstream end of the underground water channel and the ground surface, the pump suction port communicating with the pumping tank.
Claim 19
Dependent Claim
107 words
A drainage water system comprising an underground water channel in an underground location, the water channel having a deep downstream end with a top surface; a pumping tank disposed at a level above the underground water channel and communicating with the downstream end of the underground water channel, the pumping tank having a bottom level between the level of the top surface of the downstream end and the ground surface; and a pump having a suction port disposed at a level between the top surface of the downstream end of the underground water channel and the ground surface, the pump suction port communicating with the pumping tank.
Claim 20
Dependent Claim
20 words
A drainage water system as claimed in claim 12, wherein the underground water channel is at a great depth underground.
Claim 21
Dependent Claim
82 words
A drainage pump for drawing water flowing into a pumping tank through a vertical channel from a downstream end of an underground water channel provided in an underground location at a great depth, below the depth of the pumping tank, and for pumping the drawn water to a discharge location near the ground surface, said drainage pump having an impeller disposed substantially at the level of the bottom of said pumping tank and having a suction port communicating with said pumping tank.
Claim 22
Dependent Claim
82 words
A drainage pump for drawing water flowing into a pumping tank through a vertical channel from a downstream end of an underground water channel provided in an underground location at a great depth, below the depth of the pumping tank, and for pumping the drawn water to a discharge location near the ground surface, said drainage pump having an impeller disposed substantially at the level of the bottom of said pumping tank and having a suction port communicating with said pumping tank.
Claim 23
Dependent Claim
60 words
A drainage pump having a suction port communicating with a pumping tank which is in communication with the downstream end of an underground water channel provided in an underground location at a great depth, below the depth of the pumping tank, the level of the bottom of said pumping tank being disposed between said downstream end and the ground surface.
Claim 24
Dependent Claim
60 words
A drainage pump having a suction port communicating with a pumping tank which is in communication with the downstream end of an underground water channel provided in an underground location at a great depth, below the depth of the pumping tank, the level of the bottom of said pumping tank being disposed between said downstream end and the ground surface.
Claim 25
Dependent Claim
65 words
A drainage pump having a suction port disposed between a top surface of the deepest portion of an underground water channel provided in an underground location at a great depth and the ground surface, said suction port communicating with a pumping tank which is above the level of said underground water channel and is in communication with the downstream end of said underground water channel.
Claim 26
Dependent Claim
65 words
A drainage pump having a suction port disposed between a top surface of the deepest portion of an underground water channel provided in an underground location at a great depth and the ground surface, said suction port communicating with a pumping tank which is above the level of said underground water channel and is in communication with the downstream end of said underground water channel.
Claim 27
Dependent Claim
84 words
A drainage pump having a suction port disposed between a top surface of the deepest portion of an underground water channel, provided in an underground location at a great depth, and the ground surface, said suction port communicating with a pumping tank which is above the level of said underground water channel and is in communication with the downstream end of said underground water channel, the level of the bottom of said pumping tank being disposed between said downstream end and the ground surface.
Claim 28
Dependent Claim
84 words
A drainage pump having a suction port disposed between a top surface of the deepest portion of an underground water channel, provided in an underground location at a great depth, and the ground surface, said suction port communicating with a pumping tank which is above the level of said underground water channel and is in communication with the downstream end of said underground water channel, the level of the bottom of said pumping tank being disposed between said downstream end and the ground surface.
Claim 29
Dependent Claim
90 words
A drainage pump for drawing water flowing into a pumping tank from a downstream end of an underground water channel provided in an underground location at a depth below the depth of the pumping tank, through a vertical water channel connecting the pumping tank to the underground water channel, and pumping the drawn water to a discharge location near the ground surface, said drainage pump having an impeller disposed substantially at the level of the bottom of said pumping tank and having a suction port communicating with said pumping tank.
Claim 30
Dependent Claim
90 words
A drainage pump for drawing water flowing into a pumping tank from a downstream end of an underground water channel provided in an underground location at a depth below the depth of the pumping tank, through a vertical water channel connecting the pumping tank to the underground water channel, and pumping the drawn water to a discharge location near the ground surface, said drainage pump having an impeller disposed substantially at the level of the bottom of said pumping tank and having a suction port communicating with said pumping tank.
Claim 31
Dependent Claim
61 words
A drainage pump having a suction port disposed between a top surface of the deepest portion of an underground water channel provided in an underground location and the ground surface, said suction port communicating with a pumping tank which is above the depth of the underground water channel and is in communication with the downstream end of said underground water channel.
Claim 32
Dependent Claim
61 words
A drainage pump having a suction port disposed between a top surface of the deepest portion of an underground water channel provided in an underground location and the ground surface, said suction port communicating with a pumping tank which is above the depth of the underground water channel and is in communication with the downstream end of said underground water channel.
Claim 33
Dependent Claim
80 words
A drainage pump having a suction port disposed between a top surface of the deepest portion of an underground water channel provided in an underground location and the ground surface, said suction port communicating with a pumping tank which is above the depth of the underground water channel and is in communication with the downstream end of said underground water channel, the level of the bottom of said pumping tank being disposed between said downstream end and the ground surface.
Claim 34
Dependent Claim
80 words
A drainage pump having a suction port disposed between a top surface of the deepest portion of an underground water channel provided in an underground location and the ground surface, said suction port communicating with a pumping tank which is above the depth of the underground water channel and is in communication with the downstream end of said underground water channel, the level of the bottom of said pumping tank being disposed between said downstream end and the ground surface.
Claim 35
Dependent Claim
91 words
In an underground drainage facility, including an underground water channel provided in an underground location and having a downstream end with a top surface; and a pumping tank disposed at a level above the underground water channel, the pumping tank being in communication with the downstream end of the underground water channel, the improvement comprising a drainage pump having a suction port disposed between the top surface of the downstream end of the underground water channel and the ground surface and communicating with the downstream end of the underground water channel.
Claim 36
Dependent Claim
91 words
In an underground drainage facility, including an underground water channel provided in an underground location and having a downstream end with a top surface; and a pumping tank disposed at a level above the underground water channel, the pumping tank being in communication with the downstream end of the underground water channel, the improvement comprising a drainage pump having a suction port disposed between the top surface of the downstream end of the underground water channel and the ground surface and communicating with the downstream end of the underground water channel.
Claim 37
Dependent Claim
114 words
In an underground drainage facility, including an underground water channel provided in an underground location at a great depth; a pumping tank disposed at a level above the underground water channel; a vertical water channel connecting the pumping tank with the downstream end of the underground water channel; and a discharge location near the ground surface, the improvement comprising a drainage pump for drawing water flowing into the pumping tank from the downstream end of the underground water channel and pumping the drawn water to the discharge location, said drainage pump being disposed substantially at the level of the bottom of said pumping tank and having a suction port communicating with said pumping tank.
Claim 38
Dependent Claim
114 words
In an underground drainage facility, including an underground water channel provided in an underground location at a great depth; a pumping tank disposed at a level above the underground water channel; a vertical water channel connecting the pumping tank with the downstream end of the underground water channel; and a discharge location near the ground surface, the improvement comprising a drainage pump for drawing water flowing into the pumping tank from the downstream end of the underground water channel and pumping the drawn water to the discharge location, said drainage pump being disposed substantially at the level of the bottom of said pumping tank and having a suction port communicating with said pumping tank.
Claim 39
Dependent Claim
99 words
In an underground drainage facility, including an underground water channel provided in an underground location at a great depth beneath the ground surface; a pumping tank having a bottom surface disposed at a level between the level of the downstream end of the underground water channel and the ground surface, the pumping tank being in communication with the downstream end of the underground water channel, the improvement comprising a drainage pump having a suction port disposed between the top surface of the deepest portion of the underground water channel and the ground surface and communicating with the pumping tank.
Claim 40
Dependent Claim
99 words
In an underground drainage facility, including an underground water channel provided in an underground location at a great depth beneath the ground surface; a pumping tank having a bottom surface disposed at a level between the level of the downstream end of the underground water channel and the ground surface, the pumping tank being in communication with the downstream end of the underground water channel, the improvement comprising a drainage pump having a suction port disposed between the top surface of the deepest portion of the underground water channel and the ground surface and communicating with the pumping tank.
Claim 41
Dependent Claim
84 words
In an underground drainage facility, including an underground water channel provided in an underground location at a great depth beneath the ground surface; a pumping tank disposed at a depth above the underground water channel, the pumping tank being in communication with the downstream end of the underground water channel, the improvement comprising a drainage pump having a suction port disposed between the top surface of the deepest portion of the underground water channel and the ground surface and communicating with the pumping tank.
Claim 42
Dependent Claim
84 words
In an underground drainage facility, including an underground water channel provided in an underground location at a great depth beneath the ground surface; a pumping tank disposed at a depth above the underground water channel, the pumping tank being in communication with the downstream end of the underground water channel, the improvement comprising a drainage pump having a suction port disposed between the top surface of the deepest portion of the underground water channel and the ground surface and communicating with the pumping tank.
Claim 43
Dependent Claim
99 words
In an underground drainage facility, including an underground water channel provided in an underground location at a great depth beneath the ground surface; a pumping tank having a bottom surface disposed at a level between the level of the downstream end of the underground water channel and the ground surface, the pumping tank being in communication with the downstream end of the underground water channel, the improvement comprising a drainage pump having a suction port disposed between the top surface of the deepest portion of the underground water channel and the ground surface and communicating with the pumping tank.
Claim 44
Dependent Claim
99 words
In an underground drainage facility, including an underground water channel provided in an underground location at a great depth beneath the ground surface; a pumping tank having a bottom surface disposed at a level between the level of the downstream end of the underground water channel and the ground surface, the pumping tank being in communication with the downstream end of the underground water channel, the improvement comprising a drainage pump having a suction port disposed between the top surface of the deepest portion of the underground water channel and the ground surface and communicating with the pumping tank.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-06-07 | 2002-12-07 | 2003-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-06-07 | 2006-12-07 | 2007-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-06-07 | 2010-12-07 | 2011-06-08 | $7700.00 | Window Closed / Lapsed |