US3752447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixer apparatus
Assignee: Monsanto Co
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Filing: 1971-08-16
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Granted: 1973-08-14
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Expires: 1991-08-16
Abstract
Abstract A housing and paddle assembly adapted for use in processing and mixing highly viscous fluids is provided. The mixer employs a paddle assembly having a shaft which rotates about a horizontal axis. The assembly has at least two pairs of blade members. The members of each pair are symmetrically positioned about the shaft and extend axially in one half of the housing. The blade members of each pair may be slotted at diagonally opposite outside ends. In operation, the paddle assembly can sweep out substantially all of the housing interior and can produce simultaneously in a fluid cyclical vertical displacement, rolling action, horizontal displacement, and, even, fold over action.
Inventors
- 👤 J Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:13
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/20; B01F; B01F27/00; B01F27/05; B01F27/11; B01F27/112; B01F27/1123; B01F27/60; B01F27/62; B01F35/00; B01F27/1125; B01J2219/00; B01J2219/18; B01J2219/182
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
215 words
A mixer adapted for use in processing highly viscous fluids comprising: A. a housing enclosing an interior chamber whose walls are generally radially symmetrical with respect to a longitudinal axis extending therethrough, said housing having defined therein port means adapted for input and output of material into and from said chamber, B. a paddle assembly positioned generally within said housing and comprising: 1. a shaft rotatably mounted at its opposite end portions in said housing and extending generally longitudinally through said interior chamber parallelly to said axis, and 2. two sets of axially adjacent blade members, each set occupying a different 1/2 region of said interior chamber, the blade members of each set being circumferentially equally spaced from one another, each blade member of each set radially projecting from said shaft and extending axially generally continuously along said shaft, the radial width of each blade member of each set at any given point along its axial length measured from the shaft axis being such as to make the ratio of the chamber radius range from 1 to 0.5 thereat, C. bearing means functionally located between said housing and said shaft and adapting said shaft for rotational movements, and D. sealing means for said shaft adapted to prevent fluid leakage between said shaft and said housing.
Claim 2
Dependent Claim
215 words
A mixer adapted for use in processing highly viscous fluids comprising: A. a housing enclosing an interior chamber whose walls are generally radially symmetrical with respect to a longitudinal axis extending therethrough, said housing having defined therein port means adapted for input and output of material into and from said chamber, B. a paddle assembly positioned generally within said housing and comprising: 1. a shaft rotatably mounted at its opposite end portions in said housing and extending generally longitudinally through said interior chamber parallelly to said axis, and 2. two sets of axially adjacent blade members, each set occupying a different 1/2 region of said interior chamber, the blade members of each set being circumferentially equally spaced from one another, each blade member of each set radially projecting from said shaft and extending axially generally continuously along said shaft, the radial width of each blade member of each set at any given point along its axial length measured from the shaft axis being such as to make the ratio of the chamber radius range from 1 to 0.5 thereat, C. bearing means functionally located between said housing and said shaft and adapting said shaft for rotational movements, and D. sealing means for said shaft adapted to prevent fluid leakage between said shaft and said housing.
Claim 3
Dependent Claim
19 words
The mixer of claim 1 wherein each set of axially adjacent blade members contains one pair of blade members.
Claim 4
Dependent Claim
126 words
two sets of axially adjacent blade members, each set occupying a different 1/2 region of said interior chamber, the blade members of each set being circumferentially equally spaced from one another, each blade member of each set radially projecting from said shaft and extending axially generally continuously along said shaft, the radial width of each blade member of each set at any given point along its axial length measured from the shaft axis being such as to make the ratio of the chamber radius range from 1 to 0.5 thereat, C. bearing means functionally located between said housing and said shaft and adapting said shaft for rotational movements, and D. sealing means for said shaft adapted to prevent fluid leakage between said shaft and said housing.
Claim 5
Dependent Claim
126 words
two sets of axially adjacent blade members, each set occupying a different 1/2 region of said interior chamber, the blade members of each set being circumferentially equally spaced from one another, each blade member of each set radially projecting from said shaft and extending axially generally continuously along said shaft, the radial width of each blade member of each set at any given point along its axial length measured from the shaft axis being such as to make the ratio of the chamber radius range from 1 to 0.5 thereat, C. bearing means functionally located between said housing and said shaft and adapting said shaft for rotational movements, and D. sealing means for said shaft adapted to prevent fluid leakage between said shaft and said housing.
Claim 6
Dependent Claim
58 words
The mixer of claim 2 wherein in said sets of blade members, one blade member of each set is slotted in the region of one outside corner, the effective total slot cross-sectional surface area in each such blade member ranging from about 3 to 50 per cent of the effective total surface area of each individual blade member.
Claim 7
Dependent Claim
59 words
The mixer of claim 3 wherein the effective total slot cross-sectional surface area in each blade ranges from about 4 to 20 per cent of the total effective surface area thereof, and wherein the slot in each respective blade of such a pair of blades is substantially equally sized and similarly located at respective diagonally opposite outside ends thereof.
Claim 8
Dependent Claim
27 words
The mixer of claim 2 wherein each of blade member of each set is similarly radially and convexly curved with respect to the direction of shaft rotation.
Claim 9
Dependent Claim
17 words
The mixer of claim 1 wherein each blade member of each set is substantially flat and planar.
Claim 10
Dependent Claim
36 words
The mixer of claim 1 wherein said chamber has dimensions such that the ratio of the length of said chamber along said axis to the maximum diameter of said chamber ranges from about 0.5 to 3.5.
Claim 11
Dependent Claim
14 words
The mixer of claim 1 wherein said shaft is substantially coaxial with said axis.
Claim 12
Dependent Claim
23 words
The mixer of claim 1 further equipped with drive means for revolvably driving said shaft including a power head and power transfer means.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |