Patent US3556355A successfully refreshed from Google Patents.
US3556355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sealed rotary feeder
Assignee: Basic Inc
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Filing: 1968-05-28
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Granted: 1971-01-19
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Expires: 1988-05-28
Abstract
Abstract A pressured sealed rotary feeder with an inlet and outlet and a rotor mounted within a housing with a material passage therethrough. The rotor has a plurality of radially extending vanes which define material transporting compartments therebetween. Sealing means are mounted in each of the vanes of the rotor and include a movable blade which extends transversely of the vane and has a surface in contact with the interior of the passage. The surface is maintained in contact with the interior of the passage by fluid under pressure which is introduced through a passageway within the rotor and the vanes. The surface in contact with the passage is preferably of a heat resistant, self-lubricating plastic such as polytetrafluoroethylene.
Inventors
- 👤 Joseph J Ruiz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:44
CPC Classifications
B; B65; B65B; B65B37/00; B65B37/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
169 words
A rotary feeder device comprising a housing having a cylindrical passage therethrough, the axis of said passage extending transversely to the flow of material through said device, inlet and outlet means communicating with said cylindrical passage, a rotor disposed within said cylindrical passage having a plurality of radially extending vanes thereon defining material transporting compartments therebetween, each of said vanes including a slot extending transversely across the width thereof, a sealing bar positioned within each of said slots including a substantially U-shaped sealing surface, a support bar mounted on said sealing bar in each of said vanes, a rotor blade mounted on each of said support bars, the surface of said blades extending above the upper surface of said vanes in contact with the interior surface of said cylindrical passage, and means communicating with said rotor and at the underside of said sealing bars and said U-shaped sealing surface through which fluid may be introduced to maintain said rotor blades in contact with the interior of said cylindrical passage.
Claim 2
Dependent Claim
169 words
A rotary feeder device comprising a housing having a cylindrical passage therethrough, the axis of said passage extending transversely to the flow of material through said device, inlet and outlet means communicating with said cylindrical passage, a rotor disposed within said cylindrical passage having a plurality of radially extending vanes thereon defining material transporting compartments therebetween, each of said vanes including a slot extending transversely across the width thereof, a sealing bar positioned within each of said slots including a substantially U-shaped sealing surface, a support bar mounted on said sealing bar in each of said vanes, a rotor blade mounted on each of said support bars, the surface of said blades extending above the upper surface of said vanes in contact with the interior surface of said cylindrical passage, and means communicating with said rotor and at the underside of said sealing bars and said U-shaped sealing surface through which fluid may be introduced to maintain said rotor blades in contact with the interior of said cylindrical passage.
Claim 3
Dependent Claim
25 words
The rotary device of claim 1, in which said rotor blades are polytetrafluoroethylene and are mounted on said support bars by a thermosetting synthetic adhesive.
Claim 4
Dependent Claim
14 words
The rotary device of claim 2 in which said support bars are stainless steel.
Claim 5
Dependent Claim
21 words
The rotary device of claim 2 in which said sealing bars comprise a metallic bar with a surface of butadiene-acryloitrile thereon.
Claim 6
Dependent Claim
22 words
The rotary device of claim 1 in which said vanes include projections extending laterally substantially centrally thereof to reinforce structurally said vanes.
Claim 7
Dependent Claim
33 words
The rotary device of claim 1 in which said slots extend across the width of said vanes and flanges are provided on said rotor on the oppoSite sides thereof to close said slots.
Claim 8
Dependent Claim
26 words
The rotary device of claim 1 in which said inlet and outlet means include dividing means substantially centrally thereof to assist in supporting said rotor blades.
Claim 9
Dependent Claim
151 words
A rotary feeder device comprising a housing with an inlet and outlet, a rotor mounted in said housing having a plurality of radially extending vanes defining material transporting compartments therebetween, a movable sealing assembly mounted in each of said vanes, said sealing assembly including a surface above the radially outer surface of said vanes and lengthwise of the vanes in contact with the interior of said housing, means communicating with said rotor and said sealing assemblies through which fluid may be introduced to maintain said surface in contact with the interior of said housing, each of said vanes including a slot extending transversely thereof, a sealing bar positioned in each of said slots comprising a substantially U-shaped elastomeric surface and an underlying metallic bar, support bars in said vanes mounted on said sealing bars, and a polytetrafluoroethylene blade mounted on each of said transversely extending bars with a thermosetting synthetic adhesive.
Claim 10
Dependent Claim
151 words
A rotary feeder device comprising a housing with an inlet and outlet, a rotor mounted in said housing having a plurality of radially extending vanes defining material transporting compartments therebetween, a movable sealing assembly mounted in each of said vanes, said sealing assembly including a surface above the radially outer surface of said vanes and lengthwise of the vanes in contact with the interior of said housing, means communicating with said rotor and said sealing assemblies through which fluid may be introduced to maintain said surface in contact with the interior of said housing, each of said vanes including a slot extending transversely thereof, a sealing bar positioned in each of said slots comprising a substantially U-shaped elastomeric surface and an underlying metallic bar, support bars in said vanes mounted on said sealing bars, and a polytetrafluoroethylene blade mounted on each of said transversely extending bars with a thermosetting synthetic adhesive.
Claim 11
Dependent Claim
33 words
The rotary device of claim 8 in which said slots extend across the width of said vanes and flanges are provided on said rotor on the opposite sides thereof to close said slots.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |