US3909873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for dedusting loose materials
Assignee: Individual
•
Filing: 1974-08-22
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Granted: 1975-10-07
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Expires: 1994-08-22
Abstract
Abstract A device for dedusting loose materials in which there is provided an inclined covered trough along which the loose material travesl downwards. The trough bottom has an opening with a slot type grate through which from a bottom inlet, a flow of compressed air is delivered to pass through the bed of material and be extracted together with dust particles of the material through an inlet in the top portion of the trough. The slotted grate is composed of separate and parallel strips positioned in a step-like fashion perpendicular to the longitudinal axis of the trough. These strips are installed for possible turning in relation to their longitudinal axes to adjust the width of the slots therebetween.
Inventors
- 👤 Alexandr Nikolaevich Minasov
- 👤 Nikolai Viktorovich Florinsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:14
CPC Classifications
C; C10; C10B; C10B57/00; C10B57/005; B; B07; B07B; B07B4/00; B07B4/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
204 words
A device for dedusting loose materials, comprising: an inclined trough having side walls, a top and a bottom along which loose material travels downwards; a lower opening in the bottom of said trough; an upper opening in said top above the lower opening; a slot type grate mounted in said lower opening, said grate including separate parallel strips, the top surfaces of said strips being arranged in a descending step-like fashion perpendicular to the longitudinal axis of said trough for transferring the material step-by-step across said lower opening to the lower side thereof, said strips being mounted for simultaneous rotation about the longitudinal axes thereof to adjust the width of slots provided between and formed by said strips; a duct outlet connected to said lower opening to deliver compressed air from a source to the inner space of said trough via the slots between said strips of the grate; a source of suction connected to said upper opening to extract the mixture of air with dust particles of bulk material from the inner space of said trough, with the mixture being created when an upward flow of compressed air passes through the bed of material travelling across said strips and slots along the trough.
Claim 2
Independent Claim
204 words
A device for dedusting loose materials, comprising: an inclined trough having side walls, a top and a bottom along which loose material travels downwards; a lower opening in the bottom of said trough; an upper opening in said top above the lower opening; a slot type grate mounted in said lower opening, said grate including separate parallel strips, the top surfaces of said strips being arranged in a descending step-like fashion perpendicular to the longitudinal axis of said trough for transferring the material step-by-step across said lower opening to the lower side thereof, said strips being mounted for simultaneous rotation about the longitudinal axes thereof to adjust the width of slots provided between and formed by said strips; a duct outlet connected to said lower opening to deliver compressed air from a source to the inner space of said trough via the slots between said strips of the grate; a source of suction connected to said upper opening to extract the mixture of air with dust particles of bulk material from the inner space of said trough, with the mixture being created when an upward flow of compressed air passes through the bed of material travelling across said strips and slots along the trough.
Claim 3
Dependent Claim
78 words
The device according to claim 1, wherein the simultaneous rotation of the strips of the grate is effected by means of levers, each lever having one end rigidly connected to a corresponding strip at the rotative axis thereof and with the other end pivotally connected to a bar installed in parallel to the bottom of the trough for reciprocating motion in relation to the trough to adjust the width of the slots between the strips of the grate.
Claim 4
Dependent Claim
48 words
The device according to claim 2, wherein the reciprocating motion of the bar is effected by a hydraulic cylinder-piston unit whose cylinder is pivotally connected via its end to a lower surface of the trough bottom, while its piston is pivotally connected to the end of the bar.
References Cited (Backward Citations)
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US2028834A
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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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |