Patent US3876258A successfully refreshed from Google Patents.
US3876258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic suction conveyor
Assignee: Rio Tinto Switzerland AG
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Filing: 1973-03-15
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Granted: 1975-04-08
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Expires: 1993-03-15
Abstract
Abstract This invention relates to a pneumatic suction conveyor for loose material, including a suction head with a downwardly open inlet, and a feeder adjacent to this inlet; the feeder consisting of at least two rotors for loosening the material, each rotor consisting of blades existing from a shaft to a greater radius than the shaft, with means for rotating each rotor about its own axis and means for imparting bodily motion to the rotors in a path around the suction head, and at least one elongated auxiliary conveyor device, adjustable in direction relative to the suction head and having an output end located so as to deliver material to the said path.
Inventors
- 👤 Johann Heinrich Abderhalden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:51
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/40; B65G53/42; B65G65/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
132 words
In a fluid device for conveying loose material having a vertically movable frame, in combination, fluids feeding means having a central substantially vertical axis and being carried by said frame in fixed relation thereto and operable to receive and to convey said material, auxiliary transporting means comprising a rotor journalled with relation to said frame and rotatable about said axis, and a conveyor connected to said rotor and being rotatable with said rotor about said axis and normally disposed radially of said frame and in contact with material outside said feeding means and operable to have its position peripherally of said axis adjusted by said rotor, said conveyor including endless conveying means normally positioned radially with respect to said feeding means and operable for conveying said outside material towards said feeding means.
Claim 2
Dependent Claim
132 words
In a fluid device for conveying loose material having a vertically movable frame, in combination, fluids feeding means having a central substantially vertical axis and being carried by said frame in fixed relation thereto and operable to receive and to convey said material, auxiliary transporting means comprising a rotor journalled with relation to said frame and rotatable about said axis, and a conveyor connected to said rotor and being rotatable with said rotor about said axis and normally disposed radially of said frame and in contact with material outside said feeding means and operable to have its position peripherally of said axis adjusted by said rotor, said conveyor including endless conveying means normally positioned radially with respect to said feeding means and operable for conveying said outside material towards said feeding means.
Claim 3
Dependent Claim
43 words
A device according to claim 1, in which the said feeding means include a suction head and cutters and means for imparting bodily motion to said cutters arranged to move each cutter to and fro in an arc relatively to the suction head.
Claim 4
Dependent Claim
32 words
A device according to claim 2, in which the suction head terminates in a vertical pipe having an open lower end constituting an inlet, and the axis of each cutter is vertical.
Claim 5
Dependent Claim
29 words
A device according to claim 3, in which there are two cutters, and the means for rotating them causes them to rotate in opposite directions as seen in plan.
Claim 6
Dependent Claim
15 words
A device according to claim 3 including means for adjusting the size of the inlet.
Claim 7
Dependent Claim
23 words
A device according to claim 2, in which the blades of each cutter are inclined to the plane of rotation of that cutter.
Claim 8
Dependent Claim
16 words
A device according to claim 2, in which just above each cutter guide plates are fixed.
Claim 9
Dependent Claim
23 words
A device according to claim 1, including a control station mounted on said rotor adapted to accommodate an operator for observing and operating.
Claim 10
Dependent Claim
26 words
A device according to claim 1, in which the conveyor is carried by an auxiliary frame which is mounted to reciprocate vertically relatively to the rotor.
Claim 11
Dependent Claim
21 words
A device according to claim 9, in which the conveyor adjacent to its output end is pivoted to the auxiliary frame.
Claim 12
Dependent Claim
72 words
In a device, as claimed in claim 1, said conveyor further comprising a housing supporting said conveyor a supporting arm secured with relation to said rotor and pivoted to said housing; a guide pulley mounted with relation on said rotor; and a winch operably connected to said guide pulley and a flexible transmission means supported by said guide pulley and to said housing whereby the position of the conveyor may be adjusted.
Claim 13
Dependent Claim
131 words
A pneumatic suction conveyor for loose material, including a section head with a downwardly open inlet, and a feeder adjacent this inlet; the feeder including at least two rotors for loosening the material, each rotor comprising blades extending from a shaft to a greater radius than the shaft, with means for rotating each rotor about its own axis, said blades of each rotor being inclined to the plane of rotation of that rotor and including a ring fixed to the tips of said blades and means for imparting bodily motion to the rotors in a path around the suction head, and at least one elongated auxiliary conveyor device, adjustable in direction relative to the suction head and having an output end located so as to deliver material to the said path.
Claim 14
Dependent Claim
131 words
A pneumatic suction conveyor for loose material, including a section head with a downwardly open inlet, and a feeder adjacent this inlet; the feeder including at least two rotors for loosening the material, each rotor comprising blades extending from a shaft to a greater radius than the shaft, with means for rotating each rotor about its own axis, said blades of each rotor being inclined to the plane of rotation of that rotor and including a ring fixed to the tips of said blades and means for imparting bodily motion to the rotors in a path around the suction head, and at least one elongated auxiliary conveyor device, adjustable in direction relative to the suction head and having an output end located so as to deliver material to the said path.
Claim 15
Dependent Claim
13 words
A conveyor according to claim 12, in which each ring carries external teeth.
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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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |