Patent US3917235A successfully refreshed from Google Patents.
US3917235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing apparatus
Assignee: CASTAMERICA Inc
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Filing: 1974-04-26
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Granted: 1975-11-04
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Expires: 1994-04-26
Abstract
Abstract Mixing apparatus for intimately mixing two or more different materials including a horizontally positioned cylindrical housing, a rotatable axial shaft extending throughout the length of the housing, the shaft having a plurality of blades attached thereto, which blades are at an angle of inclination such as to impart helical motion to the mixing materials, thus moving them from an inlet end of the housing to the outlet end. Some of the blades are shorter than others, so that an intermittent, shearing, mixing action of the materials takes place as they traverse the length of the housing.
Inventors
- 👤 Vagn Deve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:43
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/05; B01F27/07; B01F27/071; B01F27/072; B01F27/0726
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
283 words
Mixing apparatus including a cylindrical housing having a horizontal axis, an axial, longitudinal shaft extending from one end of the housing to the other end, means for rotating the shaft, inlet means for introducing materials to be mixed into the housing at one end, outlet means through which mixed material can be discharged from the other end of the housing, a plurality of paddle means extending radially from the shaft, each paddle means consisting of a radial rod secured at its inner end to the shaft, and having a blade secured to its outer end, all of said blades being secured to the rods at an angle of inclination to a plane transverse to the axis of the cylinder such that they move the materials to be mixed together from the inlet end to the outlet end of the housing, the blades being positioned such that there is a pair of diametrically opposed blades at each longitudinal location, one of each pair of diametrically opposed blades at each longitudinal location extending in a radial direction so that its outer extremity is in close proximity to the inner wall of the cylindrical housing, while the other of each pair of the diametrically opposed blades at each longitudinal location has an outer extremity somewhat spaced from the inner wall of the cylindrical housing, so that the materials are constantly and intermittently exposed to shearing, intermixing forces as they helically travel the length of the housing, and imperforate circular baffle means secured to the shaft and extending radially to a point closely adjacent the inner extremities of the blades, said baffle means being located longitudinally at a point downstream of and adjacent to the inlet means.
Claim 2
Dependent Claim
283 words
Mixing apparatus including a cylindrical housing having a horizontal axis, an axial, longitudinal shaft extending from one end of the housing to the other end, means for rotating the shaft, inlet means for introducing materials to be mixed into the housing at one end, outlet means through which mixed material can be discharged from the other end of the housing, a plurality of paddle means extending radially from the shaft, each paddle means consisting of a radial rod secured at its inner end to the shaft, and having a blade secured to its outer end, all of said blades being secured to the rods at an angle of inclination to a plane transverse to the axis of the cylinder such that they move the materials to be mixed together from the inlet end to the outlet end of the housing, the blades being positioned such that there is a pair of diametrically opposed blades at each longitudinal location, one of each pair of diametrically opposed blades at each longitudinal location extending in a radial direction so that its outer extremity is in close proximity to the inner wall of the cylindrical housing, while the other of each pair of the diametrically opposed blades at each longitudinal location has an outer extremity somewhat spaced from the inner wall of the cylindrical housing, so that the materials are constantly and intermittently exposed to shearing, intermixing forces as they helically travel the length of the housing, and imperforate circular baffle means secured to the shaft and extending radially to a point closely adjacent the inner extremities of the blades, said baffle means being located longitudinally at a point downstream of and adjacent to the inlet means.
Claim 3
Dependent Claim
52 words
The mixing apparatus set forth in claim 1, wherein the outlet means includes an opening in the bottom of the cylindrical housing, duct means secured to the housing surrounding the opening and extending downwardly therefrom, with the lower outlet end of the duct means being movable with respect to the cylindrical housing.
Claim 4
Dependent Claim
31 words
The mixing apparatus set forth in claim 1, wherein the outlet means includes an adjustable damper, which can be set such that a slight backup of material being discharged is created.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |