Patent US3589834A successfully refreshed from Google Patents.
US3589834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical blade mixer with heating device
Assignee: Dynamics Corp of America
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Filing: 1969-04-04
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Granted: 1971-06-29
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Expires: 1989-04-04
Abstract
Abstract A food mixer having parallel shafts with integral helical intermeshing blades on each shaft. Also extending from the housing of the food mixer, is a heating device which is used in conjunction with the helical blades of the mixer.
Inventors
- 👤 Carmen P Cairelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:46
CPC Classifications
A; A47; A47J; A47J43/00; A47J43/04; A47J43/07; A47J43/0705; B; B01; B01F; B01F35/00; B01F35/90; B01F35/95; A47J27/00; A47J27/004; B01F27/00; B01F27/05; B01F27/11; B01F27/114
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
139 words
An electrical domestic mixer for foods and ingredients of foods comprising, a housing, beater means including first and second hollow shaft members supported in journaled relationship in said housing and extending downwardly from said housing, said shafts being substantially parallel, a helical blade member secured to each of said shafts and extending along the lower length thereof, said blade members having oppositely spiralled multicurved lands of substantially uniform radius disposed in interdigitating relationship and secured along their inner edges to their respective shafts, driving means within said housing for rotating said shafts in opposite directions, and electrical heating means connected within said housing and extending outwardly therefrom centrally through said shafts in heat transfer contact therewith for conduction of heat radially through the wall of said shaft and through the blades to ingredients in contact with the beater means.
Claim 2
Dependent Claim
139 words
An electrical domestic mixer for foods and ingredients of foods comprising, a housing, beater means including first and second hollow shaft members supported in journaled relationship in said housing and extending downwardly from said housing, said shafts being substantially parallel, a helical blade member secured to each of said shafts and extending along the lower length thereof, said blade members having oppositely spiralled multicurved lands of substantially uniform radius disposed in interdigitating relationship and secured along their inner edges to their respective shafts, driving means within said housing for rotating said shafts in opposite directions, and electrical heating means connected within said housing and extending outwardly therefrom centrally through said shafts in heat transfer contact therewith for conduction of heat radially through the wall of said shaft and through the blades to ingredients in contact with the beater means.
Claim 3
Dependent Claim
22 words
The mixer of claim 1 wherein said electrical heating means comprises, a straight cylindrical heating element within each of said shaft members.
Claim 4
Dependent Claim
19 words
The mixer of claim 2 wherein said heating element is firmly press-fit within and rotates with said shaft members.
Claim 5
Dependent Claim
38 words
The mixer of claim 1 wherein said heating means comprises a substantially planar heating element affixed to one of the faces of each of said helical blades and is electrically connected to a power source within said housing.
Claim 6
Dependent Claim
22 words
The mixer of claim 1 wherein said heating means comprises a solid heating element extending outwardly from said housing adjacent saId blades.
Claim 7
Dependent Claim
20 words
The mixer of claim 5 wherein said solid heating element is formed so as to substantially surround said helical blades.
Claim 8
Dependent Claim
143 words
In a mixer for foods an ingredients of foods, first and second substantially parallel hollow shafts extending downwardly from and having identical clutch elements on their upper ends connected to the driving means of said mixer for rotation in opposite directions, a helical blade member secured to each of said shafts and extending substantially along the axis of each of said shafts, said blades being spiralled in opposite directions and said shafts being positioned so that said helical blades interdigitate with each other a major portion of the distance between said shafts so as to perform a mixing function in which the mixture of ingredients between the shafts is moved axially along and in contact with said shafts, and heating means extending outwardly from said mixer in the direction of said shafts and disposed in said hollow shafts in heat exchange relationship therewith.
Claim 9
Dependent Claim
143 words
In a mixer for foods an ingredients of foods, first and second substantially parallel hollow shafts extending downwardly from and having identical clutch elements on their upper ends connected to the driving means of said mixer for rotation in opposite directions, a helical blade member secured to each of said shafts and extending substantially along the axis of each of said shafts, said blades being spiralled in opposite directions and said shafts being positioned so that said helical blades interdigitate with each other a major portion of the distance between said shafts so as to perform a mixing function in which the mixture of ingredients between the shafts is moved axially along and in contact with said shafts, and heating means extending outwardly from said mixer in the direction of said shafts and disposed in said hollow shafts in heat exchange relationship therewith.
Claim 10
Dependent Claim
23 words
The mixer of claim 2 wherein said heating means comprises vertically disposed spaced elements extending downwardly, and said hollow shafts are journaled thereon.
Claim 11
Dependent Claim
21 words
The mixer of claim 1 wherein said heating element is rigidly supported in the housing and said shaft members rotate thereon.
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |