Patent US3740025A successfully refreshed from Google Patents.
US3740025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for conveying, mixing and homogenizing high viscosity materials
Assignee: LL Plant Engineering AG
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Filing: 1971-12-16
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Granted: 1973-06-19
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Expires: 1991-12-16
Abstract
Abstract In a pump for conveying, mixing and homogenizing a highly viscous material wherein an additive is to be admixed, improved mixing is obtained by providing a casing communicating with the pump outlet. The casing contains a rotatable worm synchronously connected to the pump shaft. Rotation of worm induces mixing of the additive and viscous material. The improved pump is particularly suited for linear high polymers or copolymers.
Inventors
- 👤 E Ruf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:28
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/06; D01D1/065; B; B29; B29B; B29B7/00; B29B7/74; B29B7/7461
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
134 words
In a pump for conveying, mixing and homogenizing a highly viscous material such as a linear high polymer or copolymer having an inlet, an outlet, and a rotatable pump shaft wherein an additive is to be admixed with the viscous material, the improved pump construction which comprises i. a casing having an inlet, outlet and casing wall said casing inlet communicating with the pump outlet, ii. a rotatable worm having helical edges contained within said casing and synchronously connected to the pump wherein the edges of said worm are in close proximity to the inner casing wall, and iii. means for introducing the additive to a liquid emanating from the pump discharge whereby the material and additive are initially admixed and are further mixed in the casing by the rotating action of said worm.
Claim 2
Dependent Claim
134 words
In a pump for conveying, mixing and homogenizing a highly viscous material such as a linear high polymer or copolymer having an inlet, an outlet, and a rotatable pump shaft wherein an additive is to be admixed with the viscous material, the improved pump construction which comprises i. a casing having an inlet, outlet and casing wall said casing inlet communicating with the pump outlet, ii. a rotatable worm having helical edges contained within said casing and synchronously connected to the pump wherein the edges of said worm are in close proximity to the inner casing wall, and iii. means for introducing the additive to a liquid emanating from the pump discharge whereby the material and additive are initially admixed and are further mixed in the casing by the rotating action of said worm.
Claim 3
Dependent Claim
21 words
A pump according to claim 1 wherein said worm comprises a helical edge affixed to an extension of the pump shaft.
Claim 4
Dependent Claim
24 words
A pump according to claim 2 wherein the worm courses in the casing are orientated countercurrently to the worm courses of the rotatable worm.
Claim 5
Dependent Claim
21 words
A pump according to claim 1 wherein the inside wall of the casing is cylindrical and provided with a worm course.
Claim 6
Dependent Claim
12 words
A pump according to claim 4 wherein there are multiple worm courses.
Claim 7
Dependent Claim
22 words
A pump according to claim 1 wherein the conveying direction of the rotatable worm is countercurrent to the direction of liquid flow.
Claim 8
Dependent Claim
18 words
A pump according to claim 1 wherein the edges of the rotatable worm are interrupted by longitudinal grooves.
Claim 9
Dependent Claim
45 words
A pump according to claim 1 wherein a substantially planar polygonal piece having edges extending longitudinally to the casing axis is coaxially affixed to the end of the worm, and said edges of the polygonal piece are in close proximity to the inner casing wall.
Claim 10
Dependent Claim
22 words
A pump according to claim 1 wherein the pump comprises a gear wheel pump having a directly driven gear wheel pump shaft.
Claim 11
Dependent Claim
22 words
A pump according to claim 9 wherein said worm comprises a helical edge affixed to an extension of said directly driven shaft.
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |