US5067653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen forming apparatus and method
Assignee: IHI Corp
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Filing: 1990-06-12
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Granted: 1991-11-26
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Expires: 2010-06-12
Abstract
Abstract A screen forming apparatus and method comprises a long pipe of predetermined length floatable in the water, a pump for conveying the water through the pipe, a pipe connecting the pipe with the pump, an air-water device provided with the pipe for mixing the water with air, a number of nozzles disposed along the longitudinal direction of the pipe at predetermined intervals for injecting the water in the form of screen, and a device for producing air curtains flowing along the front and the rear surfaces of the screen in order to maintain the screen substantially uniform in thickness.
Inventors
- 👤 Toshimitsu Araki
- 👤 Fumihiko Kawamata
- 👤 Masayuki Ogino
- 👤 Hitoshi Miyagawa
- 👤 Toshio Kamata
- 👤 Mitsuo Watanabe
- 👤 Kunihiro Miyashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:15
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/608; A; A63; A63J; A63J25/00; A63J5/00; A63J5/02; A63J5/025; F; F21; F21W; F21W2131/00; F21W2131/40; F21W2131/401; Y; Y10; Y10S; Y10S239/00; Y10S239/01
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
91 words
Screen forming apparatus comprising: a first pipe of a predetermined length; a pump for conveying a working fluid under pressure to said first pipe; a plurality of nozzles for ejecting working fluid so as to form a screen, said nozzles being placed along the longitudinal direction of said first pipe at predetermined intervals; recovering means spaced from and facing said first pipe for recovering working fluid ejected from said nozzles; and means for generating an air curtain flowing along front and rear surfaces of the screen formed by the working fluid.
Claim 2
Dependent Claim
91 words
Screen forming apparatus comprising: a first pipe of a predetermined length; a pump for conveying a working fluid under pressure to said first pipe; a plurality of nozzles for ejecting working fluid so as to form a screen, said nozzles being placed along the longitudinal direction of said first pipe at predetermined intervals; recovering means spaced from and facing said first pipe for recovering working fluid ejected from said nozzles; and means for generating an air curtain flowing along front and rear surfaces of the screen formed by the working fluid.
Claim 3
Dependent Claim
16 words
Screen forming apparatus as recited in claim 1, wherein the working fluid includes whitish, non-transparent gas.
Claim 4
Dependent Claim
119 words
Screen forming apparatus comprising: a first pipe of a predetermined length; a pump for conveying a working fluid under pressure to said first pipe; a plurality of nozzles for ejecting working fluid so as to form a screen, said nozzles being placed along the longitudinal direction of said first pipe at predetermined intervals; recovering means spaced from and facing said first pipe for recovering working fluid ejected from said nozzles; and wherein said recovering means includes a second pipe having substantially the said same length as said first pipe, said second pipe having a configuration generally similar to said first pipe, and extending parallel to said first pipe and means to draw said working fluid into said second pipe.
Claim 5
Dependent Claim
119 words
Screen forming apparatus comprising: a first pipe of a predetermined length; a pump for conveying a working fluid under pressure to said first pipe; a plurality of nozzles for ejecting working fluid so as to form a screen, said nozzles being placed along the longitudinal direction of said first pipe at predetermined intervals; recovering means spaced from and facing said first pipe for recovering working fluid ejected from said nozzles; and wherein said recovering means includes a second pipe having substantially the said same length as said first pipe, said second pipe having a configuration generally similar to said first pipe, and extending parallel to said first pipe and means to draw said working fluid into said second pipe.
Claim 6
Dependent Claim
22 words
Screen forming apparatus as recited in claim 3, wherein the second pipe directly sucks the working fluid ejected from the first pipe.
Claim 7
Dependent Claim
18 words
Screen forming apparatus as recited in claim 3, wherein the first pipe is located above the second pipe.
Claim 8
Dependent Claim
26 words
Screen forming apparatus as recited in claim 3, wherein the second pipe is provided with means for sucking the working fluid ejected from the first pipe.
Claim 9
Dependent Claim
34 words
Screen forming apparatus as recited in claim 6, wherein the sucking means includes a device for reducing pressure within the second pipe such that interior pressure of the second pipe becomes below atmospheric pressure.
Claim 10
Dependent Claim
79 words
Screen forming apparatus comprising: a first pipe of a predetermined length; a pump for conveying a working fluid under pressure to said first pipe; a plurality of nozzles for ejecting working fluid so as to form a screen, said nozzles being placed along the longitudinal direction of said first pipe at predetermined intervals; recovering means spaced from and facing said first pipe for recovering working fluid ejected from said nozzles; and wherein said working fluid includes whitish, non-transparent gas.
Claim 11
Dependent Claim
79 words
Screen forming apparatus comprising: a first pipe of a predetermined length; a pump for conveying a working fluid under pressure to said first pipe; a plurality of nozzles for ejecting working fluid so as to form a screen, said nozzles being placed along the longitudinal direction of said first pipe at predetermined intervals; recovering means spaced from and facing said first pipe for recovering working fluid ejected from said nozzles; and wherein said working fluid includes whitish, non-transparent gas.
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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) | 1994-11-25 | 1995-05-27 | 1995-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-25 | 1999-05-27 | 1999-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-25 | 2003-05-27 | 2003-11-26 | $7700.00 | Window Closed / Lapsed |