Class 209/365.4 - Differential motion

Subclass of Class 209 - Classifying, separating, and assorting solids
Definition: Subject matter wherein the recipricatory motion of the sifting
No. of patents: 26
Last issue date: 10/09/2007

Number	Title	Issue Date
7278540	Adjustable basket vibratory separator A vibratory separator having a base, a basket movably mounted on the base and for supporting screen apparatus for treating material introduced into the vibratory separator, the basket on a base and pivotable with respect thereto, vibratory apparatus connected to the...	10/09/2007
7077271	Secondary screen for concrete pump An apparatus for the removal of objects and other debris from cement that is pumped via a concrete pump includes a secondary screen that is pivotally attached at one end thereof to a concrete pump a predetermined distance above a grate that is disposed over a hopper...	07/18/2006
6953122	Smart screening machine A screening machine that includes a screen having a periphery and a central porous region is provided. A motion amplifier is substantially rigidly attached in direct contact with the periphery of the screen and not in direct contact with the central porous region. A...	10/11/2005
6938778	Smart screening machine A screening machine having a base is provided. A screen is coupled to the base to separate material by size. The screening machine includes a vibration motor having piezoelectric elements and a vibration amplifier located between the piezoelectric elements and the s...	09/06/2005
6845868	Multifrequency vibratory separator system, a vibratory separator including same, and a method of vibratory separation of solids A vibratory separator for sorting solids including a housing (12) with an inlet (22) for feeding material, a first oulet (24) for discharging undersized particles, and a second oulet (26) for discharging oversized particles; and one or mo...	01/25/2005
6814242	Rotatively oscillating separator A rotatively oscillating separator comprising separating vessels 4 each having cone-shaped separating plate 5 disposed in the vessel, and drive means 6 for rotatively oscillating said separating vessels 4, mixed rice consisting of unhulle...	11/09/2004
6763948	Screening machine with acceleration modification A screening machine of the type used to separate or classify mixtures of solid particles of different sizes includes a fixed base and a perforate screen deck mounted for movement relative to the base during a screening operation. Leaf springs connect the tail end of...	07/20/2004
6679385	Motor control system for vibrating screen separator A vibrating screen separator. The vibrating screen separator may be operated in a linear, an elliptical, or in a transition from elliptical to linear modes of operation. In the linear mode of operation, the screen separator moves along a reciprocating str...	01/20/2004
6679386	Low-density particle sizing apparatus and method An apparatus and method for sizing and separating particles of generally low-density materials includes a stand, a frame movably suspended on the stand by a plurality of suspension assemblies, and an elongated screen box mounted on the frame. The screen b...	01/20/2004
6543620	Smart screening machine A screening machine that uses electrically controlled transducers to vibrate a separating screen. The transducers can be piezoelectric patches, discrete piezoelectric components, or electromagnetic shakers. Further, the transducers can be coupled directly...	04/08/2003
6513664	Vibrating screen separator A vibrating screen separator. The vibrating screen separator may be operated in a linear or elliptical mode of operation. In the linear mode of operation, the screen separator moves along a reciprocating straight line path, and, in the elliptical mode of ...	02/04/2003
6460704	Rotary shaking separator A rotary shaking separator for separating unhulled rice and unpolished rice from each other includes at least one separating vessel and a plurality of drives located at even intervals on the peripheral edge of the separating vessel, the plurality of drive...	10/08/2002
6446813	Sorting waste materials From one aspect the invention is a method of classifying waste materials comprising arranging two sieve screens, each having an inlet end and an outlet end, one above the other to define a space there between, arranging the upper screen, to be of coarser ...	09/10/2002
6029823	Recessed vibrator for an elliptical motion screen separator A structural mount for a vibrator of a screen separator is provided in which the vibrator mounting plate is secured at an angle directly to the basket side wall structure or to a load bearing structure which is parallel and fixed to the basket side wall s...	02/29/2000
6000553	Multiple screen system A screening plant including a housing to which first and second screen boxes are reciprocatably mounted. The screen boxes are coplanar and the inner peripheral edge of the first box is adjacent the inner peripheral edge of the second box. Separate prime m...	12/14/1999
5921400	Apparatus for sieving a particulate material An apparatus for sieving a particulate material into selected size fractions. This apparatus includes a screen for separating the particulate material into an undersize fraction and an oversize fraction, and having an inlet end and an outlet end. The appa...	07/13/1999
5915566	Fine mesh screening A screening system having a resiliently mounted frame with a screen extending thereacross. The frame is vibrated by a low frequency vibratory drive using eccentric weights. About the peripheral frame of the screen, a high frequency drive or drives is empl...	06/29/1999
5595306	Screening system A screening system having a resiliently mounted housing with a screen extending thereacross. The housing is vibrated by a low frequency vibratory drive using eccentric weights. About the peripheral frame of the screen, a high frequency drive or drives is ...	01/21/1997
5542548	Fine mesh screening A screening system having a resiliently mounted frame with a screen extending thereacross. The frame is vibrated by a low frequency vibratory drive using eccentric weights. About the peripheral frame of the screen, a high frequency drive or drives is empl...	08/06/1996
5301815	Screening device and method The device according to the invention comprises a vibrating frame (10) to which a vibrating housing (11) is attached, supporting a vibrating screen (12). Below this screen are attached a certain number of fixed bars (14), as well as a certain number of mo...	04/12/1994
5301814	Increasing the relative motion of a screen deck The screening efficiency of a gyratory screening machine, of the type having a moving base, is significantly increased by mounting to the base a spring/mass system which is tuned so that operation of the machine drive produces amplified movement of the ma...	04/12/1994
5037535	Superposed two frame system elastic screening machine having independent oscillating drives for each frame system In a screening machine comprising two screening frames (13 and 31) each having mutual oppositely located feed and discharge ends on which there is arranged an elastic screening lining (54) and which are caused to oscillate by independent oscillating drive...	08/06/1991
4351719	Vibrating screen apparatus A vibratory screen apparatus is employed to continuously separate particles of random sizes, such as wood chips, into groups large, medium and small sized particles. A vibratory frame has a horizontal platform driven in vibratory movement to convey partic...	09/28/1982
4315817	Vibrating surface apparatus Vibrating surface apparatus comprising a base member, vibratory motion producing member, a first spring coupling the vibratory motion producing member to the base member; a first surface adapted to be vibrated; a second spring coupling said surface to the...	02/16/1982
4028232	Separator method and apparatus A separator for effecting separation of solid materials from liquids has a filter screen arranged so that in operation liquid passes through that screen and solid materials are retained on and travel along that screen in a first direction. Generator means...	06/07/1977
3954604	Sifting machine A sifting machine having vibration generators connected to the opposite ends of a sieve screen, the vibration generators being so constructed as to vibrate one end of the sieve screen at a relatively low frequency and a relatively high amplitude and to vi...	05/04/1976

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Class 209/365.4 - Differential motion