Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 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 |
| 6925961 | Pet litter apparatus A pet litter apparatus has an upper screen to retain litter and debris, a plurality of upper bars, a lower plurality of bars, mechanism for lowering the lower plurality of bars to define spaces for passage of particulate matter between the upper and lower bars, by r... | 08/09/2005 |
| 6742657 | Integral dilute media/plant clean-up sump and pump In a mineral preparation plant which receives a raw mineral feed and separates the raw mineral feed into a clean mineral and a refuse, an apparatus is provided for use therein. The apparatus retains dilute media which is formed as a by-product of the separation proc... | 06/01/2004 |
| 6220446 | Particle size classifier A particle size classifier in which feed material composed of product and overs moves downwardly through a separator unit by the action of negative pressures created by a first air blower associated with the collection of product and a second air blower a... | 04/24/2001 |
| 5337900 | Floor recovery hopper and system therewith A media recovery hopper which lies on a floor permitting spent media and debris to be swept thereinto. The hopper, in the preferred embodiment, is a substantially rectangular box having one of its four side walls shorter than the rest. The media/debris is... | 08/16/1994 |
| 5209822 | Method for controlling liquid level in a knot drainer A screen aperture blinding prevention and liquid overflow prevention and level control apparatus for a knot drainer senses liquid level within the knot drainer and compares the sensed level to a setpoint level. Differences in the two levels generate contr... | 05/11/1993 |
| 4935124 | Rotatable wood chip classifier A rotatable wood chip thickness classifying device. The apparatus includes two coaxial, spaced sets of apertured discs, each set defining a drum. The interdisc spacing of each drum is uniform, each drum having a different interdisc spacing from the other ... | 06/19/1990 |
| 4915826 | Grain cleaner A grain cleaner and method for cleaning grain is the subject of the present invention. A single rotatable drum presents a substantially continuous screen surface of increasing mesh size from one end to another with the drum having an inlet end and an outl... | 04/10/1990 |
| 4557825 | Bag breaking and screening device, especially for blast cleaning systems An upwardly pyramidal frame, formed of angularly spaced legs converging to a point, is mountable on a holder that extends about a fill opening of the pressure tank of a blast cleaning system. The frame is so disposed as to break open the end of a bag cont... | 12/10/1985 |
| 4479872 | Method and apparatus in screening fiber suspensions Method and apparatus in screening a fiber suspension in a pressure screen (10) with an inlet (1) for the fiber suspension and outlets (2, 3) for accept and reject, respectively, a conduit (12, 13) being respectively connected to said outlets, the reject c... | 10/30/1984 |
| 4455222 | Flux recovery device An improved arc-welding flux recovery device which is compact, contamination-free, and can be economically maintained.... | 06/19/1984 |
| 4322288 | Apparatus for sizing particulate material An apparatus for sizing or separating different types of particulate material such as grain, seeds and the like without the need for replacing the sizing screens includes a movable diverter disposed between upper and lower sets of screens. When the divert... | 03/30/1982 |
| 4271011 | Flour sifter A flour sifter has an upright cylinder within the interior of which a screen is disposed generally transversely to cooperate with an agitator movable over the screen to effect the sifting of flour therethrough. Affixed across the lower end of the cylinder... | 06/02/1981 |
| 4126542 | Pressure drop device for fluid suspensions A flow comprising solid particles in a fluid suspension under pressure, typically the rejects flow from a separator, is conducted to a vortex flow chamber. In the vortex flow chamber, added liquid flow is caused to whirl and the reject flow containing con... | 11/21/1978 |
| 4120790 | Synthetic rubber dewatering apparatus and method An apparatus and method for dewatering rubber crumb in which a slurry of rubber crumb and fines overflowed from a feed tank onto a curved screen for dewatering is subjected to a change in direction away from the screen by a fixed baffle in the feed path u... | 10/17/1978 |
| 3997441 | Pressure filter separator Apparatus and method for providing continuous pressure filter separation are disclosed. The apparatus includes a chamber with a pair of perforated cylindrical sleeves having filter media and precoat material disposed therebetween. A rotatable wiper blade ... | 12/14/1976 |
