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US3799343A Expired / Lapsed US ⏱️ 0.0 years remaining

Centrifuge and method

Assignee: Individual
•
Filing: 1969-08-28
•
Granted: 1974-03-26
•
Expires: 1989-08-28
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Abstract

Abstract In a centrifuge having a basket rotatably mounted in a fixed frame for the separation of the liquid fraction from a mixture thereof with a particulate material, the improvement of providing such basket with a cam assembly including a flange extending radially outwardly therefrom and rollers secured to the fixed frame for rolling contact with the flange, such rollers and flange controlling the position of the basket in respect to the frame as the basket is rotated about its central longitudinal axis, the flange surface circumjacent to the basket being inclined so that as the basket and mixture contents therein rotate through a portion of each revolution, the basket is advanced axially in the direction of its discharge end, and thereafter, through an alternate portion of each revolution of rotation due to an abrupt change formed in the inclination of the flange, the basket and its contents are abruptly axially displaced in the opposite direction, so that the liquidparticulate material mixture within the basket is displaced relative to the wall thereof in the direction of the discharge end for eventual discharge therefrom in relatively liquid-free condition after passage through the centrifuge; and the method of transporting a liquid-particulate material mixture through a centrifuge embracing the steps of gradual axial advancement in one direction of a centrifuge basket so that the material clinging to the walls thereof is displaced in respect to such walls and repositioned thereon thereby advancing the mixture with the basket toward the discharge end thereof.

Inventors

  • 👤 L Lang

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 23:08
CPC Classifications
B; B04; B04B; B04B3/00

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 153 words
A centrifuge and the improvement therefor as defined in claim 1 and wherein further said cam means comprises: a flange mounted on said basket and extending radially outwardly therefrom circumjacent to the entire girth of said basket, formed to define at least a first section circumjacent to said basket inclined at a reLatively gradual helix angle with respect to a plane transverse to the longitudinal axis of said basket, and a second section of said flange inclined at a relatively steep angle with respect to a plane transverse to the longitudinal axis of said basket and in the opposite direction to the incline of said first section; a pair of rollers; and means mounting said rollers on said stationary base with the peripheral surfaces of said rollers in rolling contact with the surface of said flange, each of said rollers being positioned to contact opposite sides of the same portion of said flange.
Claim 2
Dependent Claim 63 words
abruptly displacing said basket in the axial direction opposite to that of the gradual displacement of said step 1, the rate of such abrupt displacement being rapid enough so that the material being treated within said basket slips with respect to the inside wall surface of the basket and moves relative thereto in the direction of the gradual advancement of said step 1.
Claim 3
Dependent Claim 107 words
A centrifuge in accordance with claim 2 wherein at least one of said rollers comprises an axle, a wheel rim and hub rotatably mounted on said axle, a tire mounted on said wheel rim to form the peripheral surface of said roller, said tire being of the pneumatically inflatable type, and valve means secured to said tire and in fluid communication therewith to communicate varying amounts of air for selective inflation of said tire; and means mounted on said axle in fluid communication with said valve means and an external source of air under pressure to selectively vary the amount of air communicated therethrough to said tire.
Claim 4
Dependent Claim 82 words
The centrifuge in accordance with claim 2 wherein said basket is of a generally cylindrical shape, and said flange is shaped to form alternate first and second sections, each of said first sections embracing an arc distance about said basket of 90* and inclined at a helix angle of 1 1/2 *, and each of said second sections adjacent to said first sections embracing an arc distance about said basket of 30* and inclined at a helix angle of 1 3/4 *.
Claim 5
Dependent Claim 55 words
The centrifuge is accordance with claim 2 and additional pairs of said rollers and means for mounting same as set forth in said claim 2, each of said pairs of rollers being spaced apart from an adjacent one thereof by an arc distance of 120* in respect to the central longitudinal axis of said basket.
Claim 6
Dependent Claim 54 words
The centrifuge in accordance with claim 4 and additional pairs of said rollers and means for mounting same as set forth in claim 2, each of said pairs of rollers being spaced apart from an adjacent one thereof by an arc distance of 120* in respect to the central longitudinal axis of said basket.
Claim 7
Dependent Claim 55 words
The centrifuge in accordance with claim 4 and three additional pairs of said rollers and means for mounting same as set forth in claim 2, each of said pairs of rollers being spaced apart from an adjacent one thereof by an arc distance of 90* in respect to the central longitudinal axis of said basket.
Claim 8
Dependent Claim 77 words
The centrifuge in accordance with claim 2 wherein said basket is positioned with the central longitudinal axis thereof substantially vertical and said basket is of a generally cylindrical shape, and additional pairs of said rollers and means for mounting same as set forth in said claim 2, each of said pairs of rollers being spaced apart from an adjacent one thereof by an arc distance of 120* in respect to the central longitudinal axis of said basket.
Claim 9
Independent Claim 66 words
The method of transporting a liquid-particulate mixture through the basket of a centrifuge, said mixture being subjected to centrifugal separation of the liquid fraction therefrom by relatively rapid rotation of said basket about its central longitudinal axis wherein the mixture, due to centrifugal action, tends to cling to the inside wall of said basket to form a relatively stationary cake, said method comprising the steps of:
Claim 10
Dependent Claim 26 words
The method in accordance with claim 9 and further the step of wobbling said basket about its central longitudinal axis during said steps 1. and 2.

References Cited (Backward Citations)

US718858A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-03-25 1977-09-24 1978-03-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-03-25 1981-09-24 1982-03-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-03-25 1985-09-24 1986-03-26 $7700.00 Window Closed / Lapsed

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