Patent US3768209A successfully refreshed from Google Patents.
US3768209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impelling wheel for particulate material
Assignee: BTR Industries Ltd
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Filing: 1972-03-27
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Granted: 1973-10-30
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Expires: 1992-03-27
Abstract
Abstract An impeller wheel for particulate material having a plurality of tubes radially positioned for impelling the material under the action of centrifugal force. The impeller wheel has a distributing rotor for the material at the axis of rotation of the wheel, the rotor having blades which are shaped to induce the material to be fed to the inner ends of the tubes in the stream of restricted width while the tubes are each rotatable about their longitudinal axis to bring different parts of the tubes into line with the stream so as to be subject to wear selectively.
Inventors
- 👤 T Punter
- 👤 P Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:21
CPC Classifications
B; B24; B24C; B24C5/00; B24C5/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
262 words
An impeller wheel for particulate material comprising a back plate and a front plate secured parallel to and spaced away from the back plate, a driving shaft attached at right angles to the back plate for rotating the front plate and the back plate together around the axis of the driving shaft, an axial aperture in the front plate for the entrance of particulate material into the space between the front plate and the back plate, a rotor positioned axially between the front plate and the back plate and driven by said driving shaft and opposite said aperture for receiving the particulate material entering into said aperture in the front plate, radially disposed vanes in said rotor which induce radial motion of the particulate material under centrifugal action, a manually adjusTable cylindrical control sleeve around the rotor and having a feed orifice in the outer periphery thereof to control the radial direction in which the particulate material is permitted to emerge as a stream from the rotor, and a plurality of equally spaced radially disposed tubes between the front plate and the back plate and adjustably fastened thereto with their inner ends positioned close to the cylindrical control sleeve, the particulate material entering each tube in turn as it passes the feed orifice of the control sleeve and following a narrow path along each tube in turn to the other end of each tube, each tube being rotatable about its longitudinal axis to bring different parts thereof into line with the stream of particulate material as the tube is subjected to wear.
Claim 2
Dependent Claim
262 words
An impeller wheel for particulate material comprising a back plate and a front plate secured parallel to and spaced away from the back plate, a driving shaft attached at right angles to the back plate for rotating the front plate and the back plate together around the axis of the driving shaft, an axial aperture in the front plate for the entrance of particulate material into the space between the front plate and the back plate, a rotor positioned axially between the front plate and the back plate and driven by said driving shaft and opposite said aperture for receiving the particulate material entering into said aperture in the front plate, radially disposed vanes in said rotor which induce radial motion of the particulate material under centrifugal action, a manually adjusTable cylindrical control sleeve around the rotor and having a feed orifice in the outer periphery thereof to control the radial direction in which the particulate material is permitted to emerge as a stream from the rotor, and a plurality of equally spaced radially disposed tubes between the front plate and the back plate and adjustably fastened thereto with their inner ends positioned close to the cylindrical control sleeve, the particulate material entering each tube in turn as it passes the feed orifice of the control sleeve and following a narrow path along each tube in turn to the other end of each tube, each tube being rotatable about its longitudinal axis to bring different parts thereof into line with the stream of particulate material as the tube is subjected to wear.
Claim 3
Dependent Claim
30 words
An impeller wheel as claimed in claim 1 in which the cross-sectional shape of the radial vanes in said rotor correspond in part to the inner surface of the tubes.
Claim 4
Dependent Claim
43 words
An impeller wheel as claimed in claim 2 in which the blades of the distributing rotor are of the same cross-sectional shape on both sides so that distribution of the particulate material is similar for either direction of rotation of the impeller wheel.
Claim 5
Dependent Claim
41 words
An impeller wheel as claimed in claim 1 in which the control sleeve is normally stationary, but is angularly adjustable about the axis of the driving shaft to vary the direction in which the particulate material is directed by the tubes.
Claim 6
Dependent Claim
35 words
An impeller wheel as claimed in claim 1 in which the cross-sectional shape of the radial vanes in said rotor corresponds to the inner surface of the tubes when the tubes rotate in either direction.
Claim 7
Dependent Claim
23 words
An impeller wheel as claimed in claim 1 in which the cross-sectional area of each tube varies along the length of the tube.
Claim 8
Dependent Claim
27 words
An impeller wheel as claimed in claim 6 in which the cross-sectional area of each tube increases progressively from the tip to the root of the tube.
Claim 9
Dependent Claim
45 words
An impeller wheel as claimed in claim 1 in which the tubes are arranged in pairs at equally spaced intervals around the wheel, while the orifice of the control sleeve is formed to provide two outlets for abrasive, one for each tube of the pair.
Claim 10
Dependent Claim
23 words
An impeller wheel as claimed in claim 1 in which each tube is symmetrical about the cross-section taken half way along its length.
Claim 11
Dependent Claim
41 words
An impeller wheel as claimed in claim 1 in which fastening means are provided for securely locating each tube in each of a plurality of rotational positions to bring the different parts of the inner surface into different abrasive contacting positions.
Claim 12
Dependent Claim
44 words
An impeller wheel as claimed in claim 10 in which the means for locating each tube in each of a plurality of rotational positions are circumferential grooves in said tubes and retaining pins mounted in said back and front plate to engage said grooves.
Claim 13
Dependent Claim
63 words
An impeller wheel as claimed in claim 1 in which fastening means are provided for securely locating each tube in each of a plurality of rotational positions said means comprising a spring clip engaging the tip of a tube, and a seat formed in said wheel adjacent the root of each tube against which the tube is axially pressed by said spring clip.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |