Patent FR423750A successfully refreshed from Google Patents.
Patent US3900187A successfully refreshed from Google Patents.
US3900187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous mixing and/or kneading machine with co-wiping single lead screws
Assignee: Baker Perkins Inc
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Filing: 1973-10-29
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Granted: 1975-08-19
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Expires: 1993-10-29
Abstract
Abstract A machine incorporating a pair of worm shafts, journaled in a mixer housing between an inlet and outlet port, and wherein single-lead worm portions on the shaft, for substantially 180* of screw extent, provide a sloping profile from a land section of maximum radial extent which wipes the barrel to a root portion of minimum radial extent for wiping the mating worm portion. Each such sloping profile is broken by a radially projecting hump.
Inventors
- 👤 Bernard A Loomans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:46
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/46; B29B7/48; B29B7/488; B29B7/489; B29C; B29C48/00; B29C48/25; B29C48/251; B29C48/2517; B29C48/36; B29C48/395; B29C48/40; B29C48/402; B29C48/03
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
121 words
In kneading and like machines: a barrel leading in a downstream direction from inlet means to outlet means provided therein; at least a pair of substantially axially parallel shafts extending in said barrel; means for revolving said shafts at substantially the same speed in the same direction of rotation; single-lead, co-wiping, mating, screw portions incorporated with each shaft which in axial cross-section for substantially 180* of screw extent provide a sloping profile from a land section of maximum profile radial extent which wipes said barrel to a portion of minimum profile radial extent; each said sloping profile being interrupted by a radially projecting hump; said laNd and hump extending continuously helically on each screw portion for the 180* of screw extent.
Claim 2
Dependent Claim
121 words
In kneading and like machines: a barrel leading in a downstream direction from inlet means to outlet means provided therein; at least a pair of substantially axially parallel shafts extending in said barrel; means for revolving said shafts at substantially the same speed in the same direction of rotation; single-lead, co-wiping, mating, screw portions incorporated with each shaft which in axial cross-section for substantially 180* of screw extent provide a sloping profile from a land section of maximum profile radial extent which wipes said barrel to a portion of minimum profile radial extent; each said sloping profile being interrupted by a radially projecting hump; said laNd and hump extending continuously helically on each screw portion for the 180* of screw extent.
Claim 3
Dependent Claim
64 words
The machine as set forth in claim 1 wherein the immediately following screw portions on each shaft, in axial cross-section, for substantially 180* of screw extent, comprise mating co-wiping single-lead sections providing, in a downstream direction, sloping profiles from said portions of minimum radial extent back to said land portions, each said latter sloping profile being broken by one of said radially projecting humps.
Claim 4
Dependent Claim
29 words
The machine as set forth in claim 2 wherein the first 360* portion of screw extent on each shaft is followed by identically profiled portions of 360* screw extent.
Claim 5
Dependent Claim
37 words
The machine as set forth in claim 1 wherein said screw portions on their respective shafts are aligned so that in a transverse cross-sectional view, the land sections on the respective shafts are in like angular position.
Claim 6
Dependent Claim
66 words
The machine as set forth in claim 4 wherein the screw portions on each shaft in transverse cross-section each comprise a lobular body having a first section on oen side of an x coordinate taken through the axis of revolution of the shaft when the lobular body is vertically disposed and a second section of lesser radial extent on the opposite side of said x coordinate.
Claim 7
Dependent Claim
51 words
The machine as set forth in claim 5 wherein said first section includes a land for wiping the barrel and flanks substantially generated by radii which extend on opposite sides of the axis of revolution from axes of generation located equal distances from the y coordinate on the said x coordinate.
Claim 8
Dependent Claim
37 words
The machine as set forth in claim 6 wherein said second section comprises a lobe portion having arcuate parts substantially formed by radii taken from points on the opposite edges of the land as axes of generation.
Claim 9
Dependent Claim
58 words
The machine as set forth in claim 6 wherein said second section has portions joining to said first section which are profiled by radii taken substantially from the said axes of generation located on the x coordinate and the central portion is formed according to a profile generated substantially by a radius extending from the axis of revolution.
Claim 10
Dependent Claim
31 words
The machine as set forth in claim 5 wherein said land comprises an arcuate crest substantially generated by a radius extending from the axis of revolution as an axis of generation.
References Cited (Backward Citations)
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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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |