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US4802825A Expired / Lapsed US ⏱️ 0.0 years remaining

Method and apparatus for maintaining a mixture of products at a certain temperature

Assignee: Stork Amsterdam NV
•
Filing: 1987-05-13
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Granted: 1989-02-07
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Expires: 2007-05-13
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Abstract

Abstract When maintaining a flow of a mixture of products consisting of a liquid of low to medium viscosity incorporating solid particles at a certain temperature and for a certain period of time the mixture remains for some time in a vessel of a substantially cylindrical shape. The residence time in the vessel of the solid particles mixed with the liquid is controlled separately from the liquid in that the solid particles are carried through the vessel at a regulable speed, independently of the speed of flow of the liquid through the vessel, with the aid of a rotatable conveyor means which is permeable to liquid but not to the solid particles and whose axis of rotation coincides with the axis of the vessel. The solid particles remain mixed with the liquid. The residence time of the solid particles is regulated such that the core of the solid particles attains the same temperature as the liquid, without the liquid remaining for too long a time at the desired end temperature.

Inventors

  • 👤 Willem F. Hermans

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 21:54
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/02; A61L2/04; A23; A23B; A23B2/00; A23B2/40; A23B2/42; A23B2/425; A23B2/46; A23B2/465

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 70 words
A method of maintaining at a certain temperature, and for a certain period of time, a flow of a mixture of products consisting of a liquid of low to medium viscosity incorporating solid particles, wherein the residence time in the vessel of the solid particles mixed with the liquid is separately controlled, such that a desired temperature of the solids can be reached independent of the flow of the liquid.
Claim 2
Independent Claim 70 words
A method of maintaining at a certain temperature, and for a certain period of time, a flow of a mixture of products consisting of a liquid of low to medium viscosity incorporating solid particles, wherein the residence time in the vessel of the solid particles mixed with the liquid is separately controlled, such that a desired temperature of the solids can be reached independent of the flow of the liquid.
Claim 3
Dependent Claim 47 words
A method as claimed in claim 1, wherein the solid particles are carried through the vessel at a regulable speed with the aid of conveyor means, independently of the speed of flow of the liquid through the vessel, while the solid particles remain mixed with the liquid.

References Cited (Backward Citations)

US1525394A Cited
US2448849A Cited
US2805843A Cited
US3130694A Cited
US4162128A Cited
US4192615A Cited
US4401606A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1992-02-07 1992-08-08 1993-02-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1996-02-07 1996-08-08 1997-02-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2000-02-07 2000-08-08 2001-02-07 $7700.00 Window Closed / Lapsed

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