Patent US4793713A successfully refreshed from Google Patents.
US4793713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary mixer
Assignee: RA INDUSTRIES Inc
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Filing: 1987-04-06
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Granted: 1988-12-27
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Expires: 2007-04-06
Abstract
Abstract A mixing device for the mixing of two or more liquids. A drive motor is connected to a hollow shaft which is rotatably contained within a shell body. The hollow shaft is configured with slotted gooves for receiving liquids to be mixed from inlets located within the shell body. A narrow annular gap region is formed between the outer surface of the hollow shaft and the inner surface of the shell body in an area of the hollow shaft not occupied by the slotted grooves. A first set of holes is configured in the hollow shaft located downstream of the narrow annular gap region for the introduction of liquids into the interior of the hollow shaft and a second set of holes configured in the hollow shaft located downstream of the first set of holes for dispensing the liquids from the interior of the hollow shaft and through the shell body.
Inventors
- 👤 L. Tony King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:17
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/40; B01F25/42; B01F25/43; B01F25/431; B01F25/4315; B01F25/43151; B01F27/00; B01F27/27; B01F27/272; B01F27/2722; B01F33/00; B01F33/80; B01F33/82; B01F33/822; B01F2025/91; B01F2025/911
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
171 words
A mixing device for the mixing of two or more liquids comprising a drive motor connected to a hollow shaft such that activation of said drive motor causes said shaft to rotate, a shell body for rotatably housing said hollow shaft, said shell body having inlets for the liquids to be mixed proximate one end thereof, slotted grooves configured within the hollow shaft for receiving the liquids to be mixed from the inlets located within said shell body, a narrow annular gap region formed between the outer surface of the hollow shaft and the inner surface of the shell body in an area of the hollow shaft not occupied by said slotted grooves, a first set of holes configured in said hollow shaft for the introduction of said liquids into the interior of said hollow shaft and a second set of holes configured in the hollow shaft located downstream from said first set of holes for dispensing said liquids from the interior of the hollow shaft and through the shell body.
Claim 2
Dependent Claim
171 words
A mixing device for the mixing of two or more liquids comprising a drive motor connected to a hollow shaft such that activation of said drive motor causes said shaft to rotate, a shell body for rotatably housing said hollow shaft, said shell body having inlets for the liquids to be mixed proximate one end thereof, slotted grooves configured within the hollow shaft for receiving the liquids to be mixed from the inlets located within said shell body, a narrow annular gap region formed between the outer surface of the hollow shaft and the inner surface of the shell body in an area of the hollow shaft not occupied by said slotted grooves, a first set of holes configured in said hollow shaft for the introduction of said liquids into the interior of said hollow shaft and a second set of holes configured in the hollow shaft located downstream from said first set of holes for dispensing said liquids from the interior of the hollow shaft and through the shell body.
Claim 3
Dependent Claim
51 words
The mixing device of claim 1 wherein hydraulic pressure is imposed on the liquids at the inlets and said slotted grooves capture liquids entering said shell body, said liquids then being caused to travel down said grooves towards said annular gap region due to the hydraulic pressure imposed on the liquids.
Claim 4
Dependent Claim
39 words
The mixing device of claim 1 wherein said hollow shaft is further connected to a pump for pumping one or more of the liquids at one of the inlets to said shell body when said drive motor is activated.
Claim 5
Dependent Claim
128 words
The mixing device of claim 1 wherein the interior of said hollow shaft is fitted with a plurality of abutting, self-nesting elements, wherein adjacent elements are configured as mirror images of one another, each element having lengths along the longitudinal axis of the hollow shaft wherein adjacent elements axially overlap, defining mixing matrices inducing both counterrotating angular velocities relative to said longitudinal axis and simultaneous inward and outward radial velocities relative to said longitudinal axis on materials moving through said mixing matrices, each element having a length along the longitudinal axis where said elements do not axially overlap, the axial non-overlap lengths of said elements along the length of the longitudinal axis defining drift spaces for the recombination of said liquids subsequent to movement through the mixing matrices.
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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) | 1991-12-27 | 1992-06-27 | 1992-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-27 | 1996-06-27 | 1996-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-27 | 2000-06-27 | 2000-12-27 | $7700.00 | Window Closed / Lapsed |