Class 209/291 - Nested

Subclass of Class 209 - Classifying, separating, and assorting solids
Definition: Series of rotating cylindrical or drum sifters on common
No. of patents: 24
Last issue date: 03/26/2002

Number	Title	Issue Date
6360894	Double skin trommel A double skin trommel having an inner drum and an outer drum joined together to rotate. Material is fed into one end of the inner drum, where some passes through apertures therein and the rest moves to the opening at the opposite end and is discharged as ...	03/26/2002
6019227	Extractor and separator apparatus The present invention is an apparatus that will extract a desired material from an undesired material. The apparatus of the present invention comparison a front portion, a middle portion, and a back portion. The front portion includes the driving method f...	02/01/2000
5915569	Device for separation and proportioning of different sized objects such as hulls and end pieces originating from cutting irradiated nuclear fuel assemblies A device comprising two coaxial drums (22, 24) is proposed in order to separate and then proportion objects of different sizes. The objects are introduced into one end of the inner drum consisted mainly of a coil (32) wound in a spiral. Large objects are ...	06/29/1999
5752435	Beansprouts roots and husks cleaning machine A beansprouts roots, husks, cleaning machine is disclosed. The machine has an internal spiral (7) and external spiral (6) in opposite directions mounted on the perforated cylinder (3) with integrated grouts bearings (8) driven by a motor rotating inside a...	05/19/1998
5607062	Screen module for preparing cosmetics nested screens of different mesh sizes A screen module for a size reduction machine has a rigid screen having a tapered apertured wall formed in a frusto-conical shape. The rigid screen has an open wide end and a flat end. The wide end is mountable within a channel of the size reduction machin...	03/04/1997
5587073	End supported double drum waste water screen An interior wedge wire drum screen is mounted wholly within an exterior drum screen of narrower wedge wire spacing, and both are mounted to a frame and caused to rotate about a common central axis. One end of the outer drum is open and the other is closed...	12/24/1996
5570790	Strainer having a main screen and a fore screen A strainer comprises a housing. A main screen is disposed within the housing. The fore screen is disposed within the housing and includes a first section and a second section. A main beater is connected to the second section of the fore screen. The fore s...	11/05/1996
5474186	Cylindrical classifier A cylindrical classifier includes a first rotating cylinder having a surface composed of parallel separator rods or tubes that extend along the length of the cylinder. The tubes or rods are spaced from each other to prevent oversized objects from passing ...	12/12/1995
5433849	Double drum waste water screen An interior wedge wire drum screen is mounted wholly within an exterior drum screen of narrower wedge wire spacing, and both are mounted to a frame and caused to rotate about a common central axis. One end of the outer drum is open and the other is closed...	07/18/1995
5343596	Inclined rotatable drums and method for grading fibrous material A separator for the separation of fibrous bark from core material of chopped or crushed stalks of a crop such as Kenaf having two or more hollow bodies for rotation on inclined axes, each having a perforated wall and upper inlet and lower outlet ends. Wit...	09/06/1994
5019248	Apparatus for grading fibrous material An apparatus for separating different phases of dry material, such as plant fibers, from each other includes a rotating hollow body on an inclined axis with an inner perforated wall, an outer perforated wall, and partitions at spaced intervals within the ...	05/28/1991
5008010	Rotating cylindrical screen with fine mesh modular panels An improved cylindrical rotary screen having as a screen member a composite element comprising a radially inner layer of fine mesh screening supported on a radially outer layer of apertured, expanded metal sheeting. The radially inner layer of fine mesh s...	04/16/1991
4927528	Sieve device for sieving out compost from rotten organic material The sieve device comprises a filling funnel for feeding the material. A conveyor belt runs on the bottom of the filling funnel. The conveyor belt projects into a sieve drum, which is driven by a hydraulic motor. The material is transported through the sie...	05/22/1990
4582202	Centrifugal sorting method A method for the sorting of bulk material comprises the feeding of the bulk material into a frusto-conical sorting means. The rotational speed of the sorting means is varied to permit the passage of the bulk material therethrough at the higher speed and t...	04/15/1986
4440637	Rotary grain screeners A rotary grain screener is disclosed in which a reverse drive transmission assembly is provided at one end of the screener and in which a second drive transmission assembly is provided at the opposite end of the screener for driving an outer drum, an inne...	04/03/1984
4312750	Grain cleaning apparatus A grain cleaning apparatus (10) for removing coarse and fine foreign materials from dirty grain before storage. The grain cleaning apparatus includes counter-rotating screen drums (18,20). Dirty grain is received in a frusto-conically shaped inner drum (1...	01/26/1982
4282090	Rotary sifting device A sifting or screening device includes inner and outer concentric screened enclosures which rotate about a common axis. An inlet is provided at one axial end of the inner enclosure and an outlet is provided at the opposite axial end of the enclosures for ...	08/04/1981
4246108	Microstrainer apparatus and method A centrifugal microstrainer includes a closed cylindrical vessel with a cylindrical screen within, both rotating about a hollow shaft forming a common central axis. Liquid-solid admixture introduced through the shaft is flowed radially outward subjected t...	01/20/1981
4202759	Centrifugal screening apparatus A centrifugal screening apparatus for scalping or sizing bulk materials in which an auger assembly conveys the bulk materials from an intake chamber into a cylindrical screening sleeve mounted within an enclosed screening chamber and subjects the bulk mat...	05/13/1980
4159242	Coal washing apparatus An apparatus for separating coarse and fine particles of intermediate specific gravity from an aggregate containing said particles of intermediate specific gravity as well as fine and coarse particles of higher specific gravity by use of a liquid of lesse...	06/26/1979
4137675	Sand reclaimer A cylindrical sand reclaimer drum for removing spent bonding contaminants and refuse from chemically bonded foundry molding sand and the like. The cylindrical drum is rotatably mounted along its longitudinal axis and is supported in a substantially horizo...	02/06/1979
4119534	Multiple deck trommel screen A multiple deck trommel screen is provided having at least an inner course screen and an outer fine screen, both having a diameter greater than the rotating drum to which they are attached for separating fines from course material. A deflector plate is pr...	10/10/1978
4115257	Grain cleaner A cleaner for removing waste particles from grain and similar agricultural products. The cleaner comprises a pair of concentric drums adapted to be rotated in unison and having perforated outer surfaces for separating out waste particles. The inner drum h...	09/19/1978
3989473	Method for pelleting carbon black Apparatus and method for treating particulate material by selectively separating the particles on the basis of size. There is disclosed a process for pelleting a particulate material such as carbon black wherein wet pelleting material is classified and on...	11/02/1976

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Class 209/291 - Nested