Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7594941 | Rotary gas cyclone separator The present invention provides a device for removing particulate matter from an air stream, and more particularly the present invention relates to a rotary gas cyclone separator with a dual-ducted filtering vortex finder for separating fine particles as small as 1 Î... | 09/29/2009 |
| 7386916 | Self-cleaning vacuum cleaner and receptacle therefor A self-cleaning vacuum cleaner 1 is disclosed. The vacuum cleaner 1 comprises a housing 2 having an inlet 5 and an outlet 6, and a fan arranged within the housing 2 for causing air to flow through a coarse filter and a fine ... | 06/17/2008 |
| 7351269 | Self cleaning filter and vacuum incorporating same A brush configured to move repeatedly over a vacuum filter. The brush will remove dust particles to prevent them from clogging the filter. In the preferred embodiment, the brush is mounted on a revolving shaft. As the shaft turns it moves the bristles of the brush o... | 04/01/2008 |
| 7341611 | Compact cyclonic bagless vacuum cleaner A compact vacuum container includes a tangential air inlet at the upper portion, a closed top and a central outlet at the bottom having an improved air separation and dirt collection container is provided. A hollow central column with a skirt formed with a downwardl... | 03/11/2008 |
| 7318249 | Vacuum collector having sweeping device A vacuum collector includes a filter housing, a filter member disposed in the filter housing, and a sweeping device disposed in the filter member for sweeping the filter member, to sweep of dirt from the filter member, and to allow the dirt to be removed from the fi... | 01/15/2008 |
| 7082640 | Ambient air backflushed filter vacuum A vacuum cleaning machine has a cannister with an inlet port and at least two outlet ports. At least two filters are disposed inside of the cannister, one in pneumatic communication through each of the outlet ports. At least two valves are disposed outside of the ca... | 08/01/2006 |
| 7074248 | Filter cleaning device of cyclone vacuum cleaner A filter cleaning device for a cyclone vacuum cleaner which comprises a cyclone body having a suction port and a discharge port, a dust collecting receptacle connected to the cyclone body for collecting dusts separated from air drawn in through the suction port, and... | 07/11/2006 |
| 7070636 | Cyclonic vacuum cleaner with filter and filter sweeper A bagless vacuum cleaner (10) includes a nozzle assembly (16) having a suction nozzle for picking up dirt and debris from a surface to be cleaned and a canister assembly (18) including a cavity (32). A dust collection assembly (12)... | 07/04/2006 |
| 6955696 | Filter frame and assembly A filter frame including a panel having a plurality of V-shaped elements disposed on the first side thereof. Each V-shaped element includes a pair of slots each configured to receive and orient a filter element. A portion of the panel disposed between adjacent pairs... | 10/18/2005 |
| 6928692 | Cyclone-type dust collecting apparatus for vacuum cleaner A cyclone-type dust collecting apparatus having a dust removing portion for removing from the grill portion the dust and foreign substances that become attached to the grill portion of the grill member while the grill portion is rotated by the vortex air of the cycl... | 08/16/2005 |
| 6638329 | Filter having a folded dust filter element and a cleaning device for the folded dust filter element A filter for filtering dust-containing air including a filter insert (2) and a cleaning device (3) having a contact element (6) mechanically contacting the filter insert along an end edge (4a/4b) of a folded dust filter element (5) forming part of the fil... | 10/28/2003 |
| 6192550 | Dust-collecting device for vacuum cleaner and upright type vacuum cleaner A dust-collecting device for a vacuum cleaner comprising a dust-collecting case which is fitted into a suction path extending from a suction nozzle to a motor fan and from which accumulated dust can be discharged by opening a bottom lid of the dust-collec... | 02/27/2001 |
| 5711775 | Sweeper with electromagnetic filter cleaning A sweeping machine includes a housing, wheels for moving the housing and a sweeping brush mounted on the housing. There is a hopper positioned adjacent the brush to receive dust and debris from the rotating brush. A dust collection chamber is located on t... | 01/27/1998 |
| 5199965 | Bag filter A device for cleaning a bag filter, closed on one side, is arranged on a supporting grid within a housing traversed by the fluid to be cleaned and is provided on the clean-gas side with an injector which is directed into the inside of the fabric filter an... | 04/06/1993 |
| 5103760 | Liquid to powder spray booth conversion insert A liquid to powder spray booth conversion insert compartment is provided that can be rolled up to a conventional wet paint spray booth to convert it to dry powder usage. A pleated fiber filter having a pore size of 20 microns inclined above powder collect... | 04/14/1992 |
| 4832843 | Apparatus for filtering fluid medium The apparatus comprises a hermetically sealed hollow housing (1) accommodating in the interior thereof a flexible filtering member (2) in the form of a hose, the ends of which are turned inside out and attached to the periphery of the inside surface of th... | 05/23/1989 |
| 4792344 | Air filtering method and apparatus Method and apparatus for filtering air are disclosed. A preferred cabinet collector (10) according to the invention includes a housing defining an upper chamber (b 20a) and a lower chamber (20b). Separating the chambers (20a, 20b) are a pair of wedge-shap... | 12/20/1988 |
| 4705467 | Method and apparatus for filtering the air outlet of a solid sulphur particle production apparatus The invention relates to a filter screen for the air outlet of an apparatus used to produce solid sulphur particles from a stream of molten sulphur supplied to the apparatus. According to the invention the filter screen comprises a plurality of closely sp... | 11/10/1987 |
| 4661129 | Filter cleaning device The present invention relates to a filter cleaning device, preferably for the cleaning of gases, such as welding fumes. To provide a filter cleaning device which efficiently cleans the filter without need for dismounting it, the filter cleaning device com... | 04/28/1987 |
| 4533371 | Vacuum cleaner A vacuum cleaner including a dust chamber, a vacuum chamber and a source for producing low pressure in the vacuum chamber, wherein the dust chamber and the vacuum chamber are partitioned by a first filter unit, and wherein the vacuum chamber is provided w... | 08/06/1985 |
| 4443235 | Self-cleaning cabinet dust collector A compact, self-cleaning, cabinet, dust collector is provided. The collector housing is a single-piece, molded unit having recessed areas and a molded air inlet. Entering dust-laden air is directed into two flows in a passageway surrounding a suspended, f... | 04/17/1984 |
| 4383840 | Dust collector with tubular bag and cage filters and beater rods A plural bag dust collector filter apparatus for filtering air to remove dust and similar contaminants therefrom including a plurality of vertically elongated tubular cylindrical upwardly opening filter bags and respective associated shape-maintaining ske... | 05/17/1983 |
| 4297114 | Vacuum cleaner having bag cleaning apparatus A vacuum cleaner having a rotor which is mounted to turn at the inside of a filter bag of the device, and which acts when turned to contact the bag and displace accumulated dust from its outer surface. The rotor may be actuable from the outside of the cle... | 10/27/1981 |
| 4246011 | Vacuum cleaning apparatus A filter medium for use in a vacuum cleaner is shown with external brush means which is movable across the filter face for cleaning the soil therefrom. The brush means may either be moved manually, by automatic controls, by time switches, by pressure diff... | 01/20/1981 |
| 4224042 | Oil bath air cleaner An air cleaner for internal combustion engines of the type comprising in a casing containing liquid, wherein the air is made to come into contact with the liquid is described. The main feature of this air cleaner is that there are means to provide a subst... | 09/23/1980 |
| 4057105 | Self-cleaning screen assembly for radiators and method A plurality of perforated endless belts are disposed in circumventing relationship about a radiator. At least one roller is disposed on either side of the radiator to engage and guide the belts with one of the rollers being motor-driven. A vertically disp... | 11/08/1977 |
| 4032307 | Method and apparatus for cleaning filter means A filter assembly for use in dust control apparatus wherein the filter assembly employs filter barrier material suspended between opposed end frame means. In order to remove accumulated solids from the filter, stroking means, such as a cam-cam follower ar... | 06/28/1977 |
