US3933648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screening apparatus
Assignee: Hosokawa Funtai Kogaku Kenkyusho KK
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Filing: 1973-10-23
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Granted: 1976-01-20
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Expires: 1993-10-23
Abstract
Abstract A screening apparatus comprising a water receptacle, a screen frame mounted on the water receptacle with a screen covering the opening of the water receptacle, a sprinkler for sprinkling water into the screen frame and a vibrator for expanding and contracting air within the water receptacle to thereby vibrate the screen.
Inventors
- 👤 Kiyoshi Urayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:36
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/28; B07B1/34
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
129 words
In a screening apparatus, the combination comprising: housing means provided with horizontal shelf portion means; means defining an opening in said shelf portion means; open ended frame means disposed about said means defining an opening; said frame means extending upwardly therefrom; screen means disposed at the lower end of said frame means and adapted to cover said means defining the opening; means for supplying liquid to said screen from a position above said screen means; plate means disposed below said screen means and inclined relative to said screen means to provide a drainage conduit for said liquid; and air pulsation means disposed below and protected by said plate means, said pulsation means communicating with said screen means by an outlet above said plate means but below said screen means.
Claim 2
Dependent Claim
129 words
In a screening apparatus, the combination comprising: housing means provided with horizontal shelf portion means; means defining an opening in said shelf portion means; open ended frame means disposed about said means defining an opening; said frame means extending upwardly therefrom; screen means disposed at the lower end of said frame means and adapted to cover said means defining the opening; means for supplying liquid to said screen from a position above said screen means; plate means disposed below said screen means and inclined relative to said screen means to provide a drainage conduit for said liquid; and air pulsation means disposed below and protected by said plate means, said pulsation means communicating with said screen means by an outlet above said plate means but below said screen means.
Claim 3
Dependent Claim
34 words
In a screen apparatus as described in claim 1, in which said means for supplying liquid includes a plurality of nozzles revolvable by the reaction force of the flow of liquid from said means.
Claim 4
Dependent Claim
27 words
In a screening apparatus as described in claim 1, in which said air pulsation means comprises spring biased magnetic diaphragm means actuated by an intermittently energized electromagnet.
Claim 5
Dependent Claim
28 words
In a screening apparatus as described in claim 1 in which said means for supplying liquid is upwardly translatable thereby providing access to said frame and screen means.
References Cited (Backward Citations)
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Cited
US969364A
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US2958655A
Cited
US3326383A
Cited
US3409125A
Cited
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Cited
US3816176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |