US3770125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillatory screening apparatus with vertical screen channel
Assignee: Individual
•
Filing: 1971-07-02
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Granted: 1973-11-06
•
Expires: 1991-07-02
Abstract
Abstract The side walls of an oscillatory screening box support a pair of associated screens defining therebetween a vertical screening channel of funnel shape. Granular material is gravity fed through the channel to an open outlet and a transverse screening motion is simultaneously imparted to the flowing material to screen fines out of the material through the screens. The oscillating drive for the assembly oscillates the same in a direction transverse to the vertical feed direction while maintaining an equilibrium of the mass.
Inventors
- 👤 J Schober
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:22
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/28; B07B1/286
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
178 words
An oscillatory screening apparatus for screening mineral granular material, comprising 1. an oscillatory screening box consisting of side walls; 2. a pair of associated screens mounted on the side walls in the box and defining therebetween a substantially vertically extending screening channel, a. the screens converging in a downward direction towards an open bottom outlet of the screening channel; 3. means for delivering the granular material to an open top inlet of the screening channel at a rate such that the said channel is filled with material along its entire length, whereby the material is gravity fed through the channel from the inlet to the outlet in a vertical direction; and 4. means for imparting oscillating motion to the screening box and the screens, at least one component of said motion being in a direction transverse to the vertical feed direction of the granular material to impart to the vertically moving material a transverse screening motion, said oscillating means including a. a drive for oscillating the screening box with the screens while maintaining an equilibrium of their mass.
Claim 2
Dependent Claim
178 words
An oscillatory screening apparatus for screening mineral granular material, comprising 1. an oscillatory screening box consisting of side walls; 2. a pair of associated screens mounted on the side walls in the box and defining therebetween a substantially vertically extending screening channel, a. the screens converging in a downward direction towards an open bottom outlet of the screening channel; 3. means for delivering the granular material to an open top inlet of the screening channel at a rate such that the said channel is filled with material along its entire length, whereby the material is gravity fed through the channel from the inlet to the outlet in a vertical direction; and 4. means for imparting oscillating motion to the screening box and the screens, at least one component of said motion being in a direction transverse to the vertical feed direction of the granular material to impart to the vertically moving material a transverse screening motion, said oscillating means including a. a drive for oscillating the screening box with the screens while maintaining an equilibrium of their mass.
Claim 3
Dependent Claim
39 words
a pair of associated screens mounted on the side walls in the box and defining therebetween a substantially vertically extending screening channel, a. the screens converging in a downward direction towards an open bottom outlet of the screening channel;
Claim 4
Dependent Claim
39 words
a pair of associated screens mounted on the side walls in the box and defining therebetween a substantially vertically extending screening channel, a. the screens converging in a downward direction towards an open bottom outlet of the screening channel;
Claim 5
Dependent Claim
47 words
The oscillatory screening apparatus of claim 1, further comprising a support for the screening box, the oscillating drive comprising a rotating eccentric mass arranged to impart to all points of the oscillating screening box and screens orbital paths in planes extending perpendicularly to the screens during oscillation.
Claim 6
Dependent Claim
51 words
means for delivering the granular material to an open top inlet of the screening channel at a rate such that the said channel is filled with material along its entire length, whereby the material is gravity fed through the channel from the inlet to the outlet in a vertical direction; and
Claim 7
Dependent Claim
51 words
means for delivering the granular material to an open top inlet of the screening channel at a rate such that the said channel is filled with material along its entire length, whereby the material is gravity fed through the channel from the inlet to the outlet in a vertical direction; and
Claim 8
Dependent Claim
61 words
The oscillatory screening apparatus of claim 1, further comprising a support for the screening box, the oscillating drive comprising a pair of rotating eccentric masses arranged in superposed vertical relationship for rotation in opposite directions to impart to all poInts of the oscillating screening box and screens substantially rectilinear oscillating paths extending horizontally in planes perpendicular to the screens during oscillation.
Claim 9
Dependent Claim
60 words
The oscillatory screening apparatus of claim 1, further comprising a support, two of said screening boxes with screens suspended from the support for synchronous oscillatory motion in a horizontal direction opposite to each other, the oscillatory motion being substantially rectilinear and extending in planes perpendicular to the screens during oscillation, and the oscillating drive comprising a fixed crank shaft means.
Claim 10
Dependent Claim
66 words
means for imparting oscillating motion to the screening box and the screens, at least one component of said motion being in a direction transverse to the vertical feed direction of the granular material to impart to the vertically moving material a transverse screening motion, said oscillating means including a. a drive for oscillating the screening box with the screens while maintaining an equilibrium of their mass.
Claim 11
Dependent Claim
66 words
means for imparting oscillating motion to the screening box and the screens, at least one component of said motion being in a direction transverse to the vertical feed direction of the granular material to impart to the vertically moving material a transverse screening motion, said oscillating means including a. a drive for oscillating the screening box with the screens while maintaining an equilibrium of their mass.
Claim 12
Dependent Claim
68 words
The oscillatory screening apparatus of claim 1, further comprising a support, a carrier for the oscillating drive, the screening box with the screens and the carrier being suspended from the support for synchronous oscillatory motion in a horizontal direction opposite to each other, the oscillatory motion being substantially rectilinear and extending in planes perpendicular to the screens during oscillation, and the oscillating drive comprising a crank shaft means.
Claim 13
Dependent Claim
38 words
The oscillatory screening apparatus of claim 1, wherein the screen characteristic Kv is between 8 and 25, Kv being the ratio of an2/90,000, a being the oscillatory amplitude in centimeters and n being the oscillatory frequency in Hertz.
Claim 14
Dependent Claim
26 words
The oscillatory screening apparatus of claim 1, wherein the mean width of the screening channel s a pi +a/2, a being the oscillatory amplitude in centimeters.
Claim 15
Dependent Claim
27 words
The oscillatory screening apparatus of claim 1, wherein the drive includes a rotary shaft, the rotary speed of the shaft being adjustable to adjust the oscillating frequency.
Claim 16
Dependent Claim
85 words
The oscillatory screening apparatus of claim 1, comprising two of said pairs of associated screens arranged parallel to each other in the screening box, a material supporting surface interconnecting the upper edges of said pairs of associated screens, and the material delivering means being arranged to deliver the material to the screening channel of one of said pairs of screens, the material supporting surface guiding overflowing material from this screening channel to the screening channel of the screening channel of the other pair of screens.
Claim 17
Dependent Claim
18 words
The oscillatory screening apparatus of claim 1, further comprising means for adjusting the width of the screening channel.
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |