U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Did You Know...

...that Robert Adler has the dubious distinction of being the Father of the Couch Potato? Back in 1955 Adler was employed by what was then Zenith Radio Corp., where he was charged to invent something that would allow viewers to turn down the TV volume without leaving their chairs. After a series of flops (such as a wired contraption that people tripped over), Adler hit on the idea of using sound waves. Thus the Remote Control was born...

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 209/234 - Combined type


Subclass of Class 209 - Classifying, separating, and assorting solids
Definition: Sifting devices including a plurality of sifters of different
No. of patents: 67
Last issue date: 06/12/2007


1    
NumberTitleIssue Date
7228971Vibratory screening machine and vibratory screen and screen tensioning structure
A vibratory screening machine having opposite sides with a plurality of stationary aligned tensioning members mounted on one side and a plurality of nut actuated movable tensioning members mounted on the opposite side and a vibratory screening screen mounted on the ...
06/12/2007
7182206Screen energizer
A screening system including a vibratory screen separator having a resiliently mounted frame with a low frequency vibratory drive coupled to that frame. A taut screen is rigidly mounted in the frame and a vibration transmitter assembly is resiliently mounted to the ...
02/27/2007
7122119Sieve separator
A sieve separator and a method of slurry separation that uses two or more levels of filtration screens. In some embodiments, the filtration screens on different levels may be used to separate solids of various sizes at each level. ...
10/17/2006
7111739Wet fine particle sizing and separating apparatus
A particle sizing and separating apparatus is disclosed. The apparatus includes a base and a frame that is movably connected to the base. A motor assembly is provided to vibrate the frame and at least two screens are connected to the frame. Means also are provided f...
09/26/2006
7000777Vibratory separator screens
Screen assemblies for a vibratory separator, the screen assemblies in certain aspects having at least two screening members, the at least two screening members connected by sewing material, and methods for making such screen assemblies. ...
02/21/2006
6932883Screens for vibratory separators
A method for making a screen assembly for a vibratory separator, the method including, in at least certain aspects, gluing together with glue at least two layers of fine screening material, allowing the glue to set, preheating the glued together at least two layers ...
08/23/2005
6923329Screen apparatus
A screen apparatus includes a tank, a first cylidrical screen disposed inside the tank to form a first chamber, and a second cylidrical screen disposed outside the first cylindrical screen. The second cylindrical screen defines a second′ chamber facing the first c...
08/02/2005
6910587Gumbo separator methods and apparatuses
A separator system for separating first material from second material, in one aspect for separating gumbo from drilling fluid, a combination of the first material and second material introducible to the separator system, the separator system having a screen conveyor...
06/28/2005
6848583Drilling fluid treatment
A shale shaker having a basket for holding screen assembly apparatus, screen assembly apparatus for treating fluid introduced to the shale shaker, a roller bed assembly secured above and/or to the basket above the screen assembly apparatus, the roller bed assembly h...
02/01/2005
6843376Mobile screening unit
A mobile screening unit for screening bulk material. The screening unit comprises a first screener, a second screener, and an elongated mobile support frame having a longitudinal axis. The first screener is mounted to the support frame and extends longitudinally the...
01/18/2005
6601708Apparatus for processing PVA
A process and apparatus for processing polyvinylacetate and other similar ingredients of a gum base or chewing gum product are disclosed. The ingredient materials are separated into individual pieces by a lump breaker and conveyed through a pneumatic conv...
08/05/2003
6540089Large, stationary, modular aggregate processing plant and method of manufacturing and installing same
A method of manufacturing a large stationary, aggregate processing screening tower by fabricating weldment modules and preassembling them with aggregate processing equipment internal within the weldment modules, transporting the preassembled weldment modu...
04/01/2003
6532495Internet download enhancement system
An Internet download enhancement system for downloading a file comprising an application arranged to initiate a download process and receive a downloaded file over one of a narrow band download path and a broadband broadcast download path, wherein modules...
03/11/2003
6386374Multi-mass filter with electric field variations
A multi-mass filter for separating particles of a multi-species plasma includes a chamber, which defines an axis. A radial electric field is crossed with a magnetic field (E×B) to move the particles of different mass (M1, M2 and M
05/14/2002
6293406Multi-mass filter
A multi-mass filter for separating particles according to their mass-charge ratio includes a chamber for receiving a multi-species plasma that includes particles therein having different mass-charge ratios (with M1
09/25/2001
6142309Method of determining the amount of residue in carbon black
Test methods are provided for determining the amount of contaminants in a carbon black sample. The test procedures include screening a known amount of carbon black to separate larger particles in the sample from smaller particles. The sample and/or separa...
11/07/2000
6142308Process of and apparatus for separating components of free-flowing material contained in a carrier
An apparatus for separating components of free-flowing material contained in a cotton-like, mat-like carrier, includes an air accelerator providing an accelerated air stream for tearing apart the carrier to form flakes. Positioned downstream of the air ac...
11/07/2000
5865317Woodwaste processing system with contaminate separation
A system for processing wastewood. The system may be mounted on a towable chassis. The wastewood is received at one end of the system and metal contaminants are removed from the wastewood. The wastewood is then separated according to size wherein a first ...
02/02/1999
5601690Method for screening pulp
A method for screening fibrous stock slurry having a rotor impeller and a screen, in which accepts quality and throughput may be adjusted without stopping the screening process by relative displacement of the clearance between the rotor and the screen pla...
02/11/1997
5451004Integrated waste pulping and liquid extraction system
A waste compaction and liquid extraction system is provided. The system includes a tank for containing liquid and solids. The tank has an input port for receiving liquid, and an output port for discharging a mixture of liquid and solids. A rotary disc imp...
09/19/1995
5443213Screen apparatus for paper making
A screen apparatus for paper making capable of substantially fully recovering fibers from a paper feedstock which has been subject to a pulper and discharging a residue while dehydrating it. A paper feedstock is subject to two-stage maceration and two-sta...
08/22/1995
5435444Composite type screen
A composite type screen includes a machine main body divided into a first structural part in which a first processing chamber is contained and a second structural part in which a second processing chamber is contained and a screen plate is interposed betw...
07/25/1995
5361909Waste aggregate mass density separator
Apparatus and method are disclosed for separating and recovering the solid particle components of a waste aggregate using screening and air separation mechanisms. Such an aggregate could be log yard waste comprising soil, wood and mineral particles. The a...
11/08/1994
5248042Resilient wire-wrapped, and adjustably tensioned screen drum with drum overload-preventing feedback control
A mobile screening apparatus includes a horizontal rotary drum preferably fed by underflow from a prescreening device that is reversible endless belt of screening grizzly bars. The belt reverses for expelling oversize material caught between bars. Force n...
09/28/1993
5236093Rate control overflow system for disk screens
The system includes a variable speed motor (13) which controls the operation of a disk screen (14) which is part of a gyratory screen/disk screening system for wood chips and the like. Wood chips are fed at a variable rate to a storage bin (34), which inc...
08/17/1993
5232097Screening method and apparatus
The present invention concerns a screening method and apparatus for sorting wood chips into three categories, namely, accept chips, overthick and/or overlong chips requiring further processing and reject fines. The chips are fed onto a disc screen. A majo...
08/03/1993
5219078Material separating and sizing apparatus with vibrating rods and method
A material separating apparatus and method which comprises a frame of a pair of spaced apart generally downwardly sloping, upper and lower vibratory screening decks within the frame, the upper screening deck comprising a plurality of comb-like elements, w...
06/15/1993
5183160High volume padding machine
A pipeline padding machine for use with a motorized carrier is mounted on a flat bed trailer adapted to be hitched to the carrier. Collector apparatus mounted beneath the screening apparatus receives the earth from a discharge at the bottom of the screeni...
02/02/1993
5143305Soil treatment apparatus and method
A method and apparatus for removing from soil particles within a predetermined size range, comprises a movable frame, and a digger attached thereto to excavate soil as the frame is moved. A first separater to which the excavated soil passes allows materia...
09/01/1992
5137621Integrated screening system for sizing wood chips
A wood chip screen system which includes a gyratory screen apparatus (10) and a disk screen (12). The gyratory system apparatus includes a top screen element (14) and a lower screen (16). The inflow end of the disk screen (12) is immediately adjacent the ...
08/11/1992
5133507Procedure and apparatus for the sorting of wood chips
A two-stage procedure is disclosed for sorting wood chips. The chips are directed to a gyratory screen in the first stage and to a disc screen in the second stage. The chip flow is divided in the first stage into four fractions of which the first fraction...
07/28/1992
5078274Method and apparatus for wood chip sizing
A system and process for sizing wood chips to provide a flow of wood chips which are acceptable for feeding to a digester of a pulping system. A flow management screen station is provided which divides an incoming unacceptable flow into two fractional flo...
01/07/1992
5074992Woodwaste processing system with contaminate separation
A system for processing wastewood. The system may be mounted on a towable chassis. The wastewood is received at one end of the system and metal contaminants are removed from the wastewood. The wastewood is then separated according to size wherein a first ...
12/24/1991
5000390Apparatus and method for sizing wood chips
A wood chip sizing apparatus, based on the thickness dimension, which includes a gyratory screen system (16) comprising three separate screens (18, 22, 26) which produces a total of four fractions, one fraction (20) comprising substantially all overthick ...
03/19/1991
4998625Riprap separation apparatus and method
A riprap separation apparatus and method which riprap apparatus comprises a frame having an open space within the frame, an upper grizzly section composed of a tiltable upper grizzly section having a plurality of fixed, spaced apart bar elements so that r...
03/12/1991
4991720Apparatus for dividing a suspension of fibrous cellulose pulp
In an apparatus for dividing a suspension of fibrous cellulose pulp into a plurality of portions in a closed housing having multiple inlets and outlets, the present invention suggests that the closed housing is divided into two chambers, each provided wit...
02/12/1991
4948299Padding machine
There are disclosed two embodiments of a pipeline padding machine which comprises a first rearwardly inclined conveyor mounted on a vehicle adapted to be moved along a ditch in which a pipeline has been laid and over a row of spoil which has been removed ...
08/14/1990
4941970Apparatus for dividing a suspension of fibrous cellulose pulp
In an apparatus for dividing a suspension of fibrous cellulose pulp into a plurality of portions, a closed housing is provided which is divided into two chambers, each provided with at least one inlet and outlet, and in the first chamber a separating devi...
07/17/1990
4907702Automatic chip classifier and system
A wood chip classifier and classification system in which chips are separated into a plurality of fractions according to chip size in an apparatus having an automatically adjustable hole spacing for first removing from a sample chips in the fraction small...
03/13/1990
4896835Screening machine
A screening machine has a rotating screening drum for screening dirt or other material to a desired size through the screen openings, and is made so that it reduces clogging of the screen, even when rocks, dirt clods, and moist dirt is being screened. The...
01/30/1990
1    
 
Sign InRegister
Username  
Password   
forgot password?