Patent US4277263A successfully refreshed from Google Patents.
US4277263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air and rock particle separator with spiral deflectors
Assignee: Equifab Inc
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Filing: 1979-03-26
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Granted: 1981-07-07
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Expires: 1999-03-26
Abstract
Abstract A separator for use in separating air-born rock material from air. The separator comprises a housing defining a generally horizontal air flow path with at least one set of spiral deflector bands within the housing extending across the flow path. Each band preferably comprises a twisted strip of material which is resilient, but the strip can also be made from rigid or flexible material.
Inventors
- 👤 Willard Bergeron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:45
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; B01D46/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
149 words
An air borne rock separator for use in separating the heavier rock material from an air stream carrying heavy and light rock material, the separator having a housing defining a generally straight air stream path, an inlet at one end of the housing, an outlet at the other end of the housing, at least one set of spirally twisted deflector bands extending across the air stream path in a plane generally perpendicular to the air stream path, the bands made of material strong enough to normally intercept and deflect the heavier rock material, at least the outer portion of the bands composed of resilient material of sufficient thickness to allow the bands to give slightly when struck by heavier rock material so as to increase their operational life, and including at least one screen mounted in the housing extending across said air stream path downstream from said deflector bands.
Claim 2
Dependent Claim
149 words
An air borne rock separator for use in separating the heavier rock material from an air stream carrying heavy and light rock material, the separator having a housing defining a generally straight air stream path, an inlet at one end of the housing, an outlet at the other end of the housing, at least one set of spirally twisted deflector bands extending across the air stream path in a plane generally perpendicular to the air stream path, the bands made of material strong enough to normally intercept and deflect the heavier rock material, at least the outer portion of the bands composed of resilient material of sufficient thickness to allow the bands to give slightly when struck by heavier rock material so as to increase their operational life, and including at least one screen mounted in the housing extending across said air stream path downstream from said deflector bands.
Claim 3
Dependent Claim
32 words
A separator as claimed in claim 1 wherein the bands are mounted at their ends in spaced-apart relation in a frame, and mounting means within the housing for removably mounting the frame.
Claim 4
Dependent Claim
22 words
A separator as claimed in claim 2 wherein the frame is removably mounted in the mounting means with the bands extending vertically.
Claim 5
Dependent Claim
21 words
A separator as claimed in claim 1 including a further outlet at the bottom of the housing for the deflected material.
Claim 6
Dependent Claim
16 words
A separator as claimed in claim 1 wherein the bands are made entirely from resilient material.
Claim 7
Dependent Claim
20 words
A separator as claimed in claim 1 wherein the bands are made from flexible metallic material coated with resilient material.
References Cited (Backward Citations)
FR789409A
Cited
GB464433A
Cited
US3307336A
Cited
US3446906A
Cited
US3763633A
Cited
US3880626A
Cited
US3910360A
Cited
US3913890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-06 | 1985-01-05 | 1985-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-06 | 1989-01-05 | 1989-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-06 | 1993-01-05 | 1993-07-07 | $7700.00 | Window Closed / Lapsed |