Class 210/217 - Drum

Subclass of Class 210 - Liquid purification or separation
Definition: Apparatus in which the moving filter medium comprises a
No. of patents: 29
Last issue date: 11/13/2007

Number	Title	Issue Date
7293659	Drum structure for rotary drum filtering apparatus and methods of using same A drum structure for corrugated type rotary filters has relatively high filtering efficiency and relatively low manufacturing and/or installation costs. More specifically, a corrugated deck section is rigidly connected to a rotary drum structure by means of solid no...	11/13/2007
7083735	High debris content strainer A high debris content strainer that utilizes a cylindrically-shaped screen having four removal assemblies positioned evenly around the screen periphery. Each removal assembly includes a backwash spray bar on the downstream side of the screen and a scraper/brush and ...	08/01/2006
6488849	Rotating device for continuously filtering a liquid such as a solution containing a precipitate The present invention relates to a rotating device for continuously filtering a liquid such as a solution containing a precipitate. According to this invention, the device comprises a cylindrical, horizontal-axis drum of revolution, rotated by a drive system, ...	12/03/2002
6190551	Reservoir shower for rotary vacuum filter The invention provides a shower module that includes an upper elongated chamber, a supply pipe located in the upper elongated chamber, wherein the supply pipe includes at least one discharge opening that faces a side wall of the upper elongated chamber, a...	02/20/2001
6004468	Serial drum apparatus and method for processing wet material An apparatus for processing a solid-liquid material comprises a housing formed with a series of interconnected chambers defined by chamber walls with at least two drums mounted in series within the chambers. Each chamber receives one of the at least two d...	12/21/1999
5965017	Sealed shower system for rotary vacuum filter A sealed shower system applies shower water to a pulp mat as it passes through a sealed chamber under a vacuum with an air supply that is externally regulated. The shower water forms a pond or film on the pulp mat. The amount of entrapped air is minimized...	10/12/1999
5707512	Apparatus for the separation of solid-liquid mixtures The invention relates to a process for the separation, in particular filtration of liquids and solids from solid-liquid mixtures, such as from a mineral, ore, coal or sludge suspensions of contaminated earth. The processing space of the filtration apparat...	01/13/1998
5676847	Method for recovering crystals from slurry with wash water recycle means A method for recovering crystals from a crystal-containing slurry, which comprises supplying the slurry to a rotary filter having a rotating cylindrical filter medium, filtering the supplied slurry in a filtering region to retain the crystals on the filte...	10/14/1997
5552044	Apparatus for separating solid material and liquid Apparatus for separating waste liquid and solid material comprises an upwardly inclined passage containing an auger for conveying the solid waste material upwardly along the passage, with an inlet opening at a lower end of the passage for receiving a mixt...	09/03/1996
5296136	Apparatus for separating liquids and solids comprising screens and augers Apparatus for separating solids and liquids has an initial separator for removing coarse solid material from a mixture of solids and liquids, a first screen for separating further solid material from the liquid and a first auger extending axially through ...	03/22/1994
5152889	Drip pipe for application of wash liquid to filter surfaces A wash liquid distributor is described for applying liquid uniformly across a filter cake on a filter surface providing effective washing and exhibiting resistance to clogging and fouling. The wash liquid distributor consists essentially of, in combinatio...	10/06/1992
4919158	Method and apparatus for washing pulp The present invention relates to a method and an apparatus for washing pulp according to which method the pulp is supplied onto a movable liquid-pervious support surface (2) to form a substantially continuous layer (7); and washing liquid is supplied to t...	04/24/1990
4907426	Method and apparatus for washing a porous mat A retainer maintains a body of standing washing liquid against the outside surface of a mat, such as a pulp mat. The mat moves on a vacuum screen which draws washing liquid from the body of liquid through the mat to clean it. The retainer pivots to adjust...	03/13/1990
4795558	Shower pipes for rotary drum filter A shower pipe for a rotary drum filter includes first and second parallel rows of spray holes which extend along the length of the pipe. The holes in one row are staggered with respect to the holes in the other row, with both rows being positioned circumf...	01/03/1989
4774097	Centrifugal finisher and method for separating juices from fruits and vegetables A centrifugal finisher and method of its operation are disclosed for separating finished juice from an initial juice including substantial solids or for separating finished fluid from any slurry including substantial solids, the slurry being introduced in...	09/27/1988
4750340	Apparatus for treating a fibre suspension An apparatus for treating a fiber suspension, comprises a drum rotatably journalled to a stand and having an envelope surface to support a fiber web formed from the fiber suspension. A curved wall plate which is concave in the direction to the envelope su...	06/14/1988
4697292	Shower pipes for rotary drum filter A shower pipe for a rotary drum filter includes a fiberglass pipe body of rectangular cross section with two rows of spray holes and with the holes of one row being staggered with respect to the holes of the other row. The upper row includes a separate di...	10/06/1987
4670099	Method and apparatus for washing a mat of pulp stock on a drum filter A shower pipe for a rotary drum filter has a square cross-sectional shape defined by top, bottom and side walls. The sidewalls and a pair of lengthwise-extending continuous diffusion flanges depending from the bottom wall of the pipe stiffen the pipe agai...	06/02/1987
4655937	Rotary drum vacuum filter for easily eroded cakes Disclosed is an improved rotary drum vacuum filter that is especially useful in the filtration of particulates that form an easily eroded cake. The improved filter utilizes sprayers and a spray blocking means to achieve an unexpectedly efficient rinse of ...	04/07/1987
4541929	Device for drying of solid materials A sieve drum (2) for drying solid materials such as, for example, brown coal is rotatably supported for being rotated around its axis (8). A conveying screw (3) is arranged within the interior of the sieve drum and can be rotated independent from the rota...	09/17/1985
4522716	Shower pipes for rotary drum filter A shower pipe for a rotary drum filter has a square cross-sectional shape defined by top, bottom and side walls. The sidewalls and a pair of lengthwise-extending continuous diffusion flanges depending from the bottom wall of the pipe stiffen the pipe agai...	06/11/1985
4518621	Method and apparatus for finishing juices from fruits and vegetables and the like A method and apparatus are disclosed for extracting finished juice from an initial juice including substantial solids or for extracting fluid, preferably finished to a high degree, from any slurry including substantial solids, wherein the slurry is introd...	05/21/1985
4407720	Method and apparatus for filtration of contaminated liquids A fully submerged rotatable drum type of filter has a perforate cylindrical surface through which contaminated liquid is pulled by a suction pump. The inner periphery of the drum is sub-divided into numerous narrow, shallow, elongated chambers open at one...	10/04/1983
4248709	Method of filtering sewer scum and apparatus therefor The method of treating sewer scum including combustibles and debris includes the steps of collecting the scum from sewage, delivering it to a perforated filter drum, continuously rotating the drum upon an inclined longitudinal axis, applying heated air un...	02/03/1981
4217170	Pulp washer discharging a low consistency pulp slurry A substantially air-tight vat completely encloses the rotatable cylinder. The pulp slurry fed into the vat is compacted to form a mat of high consistency. The differential pressure across the circumferential wall of the rotatable cylinder washes the mat w...	08/12/1980
4121968	Secondary vacuum box for a rotary vacuum filter An apparatus for improving the dewatering capability of a rotary drum vacuum filter or washer is described in which a suction box, independently supported above the filter drum, having an apertured outermost surface, and a vacuum means operating upon the ...	10/24/1978
4115265	Method and apparatus for dehydrating suspension Method and apparatus for dehydrating suspensions by means of a vacuum filter and consisting of applying the suspension to the surface of the vacuum filter, directing steam along the path parallel to the surface and thereafter passing the steam into contac...	09/19/1978
4066555	Rotary filter An improved rotary filter is cylindrical in shape, and operates by vacuum suction or otherwise to withdraw fluids from a substance exposed to the outer area of the device, drawing said fluids into the filter to be pumped out to a suitable reservoir. It in...	01/03/1978
4008154	Rotary filter wash distributor A wash liquid distributor for a rotary drum filter which distributes liquid uniformly across the filter cake and provides very effective washing. The distributor apparatus in its preferred embodiment comprises an elongated hollow pipe, one or more being u...	02/15/1977

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Class 210/217 - Drum