In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 7125486 | Device for removing small solids from water in canal There is disclosed a device for removing small solids from water. The device includes an axle and a plurality of rotational filtering units installed on the axle. While rushed and hence rotated by water and small solids, the rotational filtering units filter the sma... | 10/24/2006 |
| 7111739 | Wet 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 |
| 6948669 | Apparatus for mixing and aerating material This invention generally relates to reduction drive assemblies and, more particularly, to belt and pulley reduction drive assemblies and related support structure for portable equipment to mix and aerate materials. The support structure is adapted to provide support... | 09/27/2005 |
| 6419842 | Method and installation for separating solids contents from a pulp For separating solids contents from a pulp, the pulp is concentrated in a filter device by intense movement up to a predetermined solid matter content. In the filter device, the dynamic pressure and Venturi effects are utilized to support the filtering pr... | 07/16/2002 |
| 5593582 | Two for one shale shaker A shale shaker having two feeds, two screens, two mud outlets and a removable tray between the screens is disclosed. Each screen receives one feed and produces one outlet of cuttings and another outlet for separated mud for either bypass or direct feed to... | 01/14/1997 |
| 5482626 | Analytical liquid test sample filtration apparatus A liquid sample filtration apparatus includes: a) a module retaining filter elements; b) a filter clamping and fluid injection apparatus positioned relative to the module to engage a filter element thereon, and includes a pair of first and second opposing... | 01/09/1996 |
| 5200074 | Ion-exchange apparatus having rotatable cartridges An apparatus for separating a component from a liquid is disclosed herein. The apparatus includes a plurality of cartridges disposed within a tank, the cartridges being mounted on a support member rotatable about a first axis, and each cartridge being rot... | 04/06/1993 |
| 4673491 | Process and apparatus for the centrifugal separation of fine-grain mineral mixtures Separating elements (14) arranged about a central shaft (1a) rotate in common about the main axis (A) and individually about their longitudinal axes (B). A centrifugal distributor (6) distributes fine-grain mineral mixture mixed with fluid uniformly to th... | 06/16/1987 |
| 4536288 | Pocket centrifuge and method of operating same A pocket centrifuge has a plurality of sieve pockets having sieve surfaces and orbitable about an axis with the sieve surfaces forming sieve angles with perpendiculars to planes including this axis. A filtrant is fed radially to these pockets so that soli... | 08/20/1985 |
| 4454041 | Apparatus for the separation of particles from a slurry Fine particles such as minerals in a slurry are separated according to their specific gravity by cyclic centrifugal acceleration preduced by rotating a chamber (40) about its own axis and a further axis. Particles of greatest specific gravity are removed ... | 06/12/1984 |
| 4451371 | Apparatus for separating liquid from a slurry Apparatus for separating liquid from solids contained in a liquid-solid slurry includes a centrifugal concentrator which is supplied with feed slurry, and a centrifugal separator to which the output of the concentrator is conducted. The concentrator inclu... | 05/29/1984 |
| 4292177 | Pressurizable rotary filter A rotary filter has a pressure vessel and a rotor from which a plurality of filter cells are suspended from outer portions of the rotor so that they clear a conveyor located proximal to the axis of rotation and upon which the filter cake is removed. Condu... | 09/29/1981 |
| 4277017 | Gear drive for seal-less counter current chromatography A flow-through coil planet centrifuge mechanism with variable rotation-revolution (r/R) speed ratios, which does not employ rotating seals. The rotation and revolution rates are continuously adjustable by using separate variable-speed drive motors. A syst... | 07/07/1981 |
| 4220536 | Apparatus for filtering liquids An apparatus for filtering liquids comprises a substantially cylindrical shaped and horizontally placed filter-casing in which at least one supporting member is journaled for rotation substantially about the axis of the casing. The supporting member is pr... | 09/02/1980 |
| 4199459 | Continuous filtering-settling centrifuge The subject of the invention is a continuous filtering-settling centrifuge designed for separating continuously mixtures containing solid and liquid bodies. In the centrifuge several filtering or settling baskets are applied, situated beyond the main axis... | 04/22/1980 |
| 4000073 | Continuous discharge centrifuge A continuous discharge centrifuge for material of any nature, and particularly suitable for fibrous materials comprising a rotating structure, a filtering surface associated with it and provided with its own drive, and disposed without discontinuity along... | 12/28/1976 |
| 3972817 | Filter, especially for back water A filter comprising a vessel in the form of a closed drum which is rotatably mounted about a horizontal central axis, and a plurality of longitudinal, hollow, horizontal filter elements which are arranged in a ring. The filter elements extend between and ... | 08/03/1976 |