Did You Know...
...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 4088579 | Process and equipment for the thickening of slurries Slurry to be densified by removal of water is passed into an inlet of a housing, through the housing, and out an outlet. Inside the housing are a plurality of elongated hollow filter elements, which extend in the direction of flow of the slurry. Water in ... | 05/09/1978 |
| 4059518 | Filter with axially shiftable rotating backwash selector A filter assembly including a housing with a plurality of individual filter units circumferentially arranged within the housing. The housing is compartmented to channel a contaminated fluid to be filtered in a filtering direction through the filter units,... | 11/22/1977 |
| 4046692 | Domestic water control unit A control unit is formed of a housing containing a filter with an inlet and outlet in line above the filter, the latter forming a channel with the housing; a pressure reducer is positioned between the inlet and the outlet above the filter. A rotary valve ... | 09/06/1977 |
| 4045345 | Self-flushing filter An in-line self-flushing filter comprises a cylindrical filter body within a housing, a rotatable member defining a purging chamber having an inlet opening close to and facing the cylindrical surface of the filter body, a purging conduit fixed to the rota... | 08/30/1977 |
| 4042504 | Self cleanable filters A self-cleanable filter, comprises: a housing having a fluid inlet, a fluid outlet, and a dirt purging opening; a filter body within the housing and having a surface facing the inlet side of the housing; and a cleaning body within the housing and movable ... | 08/16/1977 |
| 4038187 | Microscreen drum The specification discloses an improvement in rotary drum screens for the filtration of liquids which comprise (a) a drum having a central horizontal axis and a radially outer surface, (b) a plurality of microscreen grids mounted on the radially outer sur... | 07/26/1977 |
| 4032442 | By-pass and synchronized blow system and method for rotary vacuum filters A method and system for use with rotary vacuum filters having a plurality of circumferentially spaced filter segments, for selectively applying blower air to the filter segments at predetermined rotational positions at which relatively unrestricted openin... | 06/28/1977 |
| 4032443 | Removal of grease and oil from particulate bed granules by backwashing with a detergent Filtering solids from waste water liquids and cleaning, degreasing and restoring the filtering media through the use of cleaning compounds forced up through the filtering substances.... | 06/28/1977 |
| 4029114 | Back filter automatic vehicle wash water reclaim system The back filter automatic vehicle wash water reclaim system of the present invention is adapted for receiving drain water from an automatic car wash bay and includes a plurality of pairs of back wash filter tanks which are connected together in a manner w... | 06/14/1977 |
| 4025431 | Apparatus for cleaning and aerating water within an aquarium tank A filter for an aquarium tank and apparatus for cleaning and aerating water within the tank. A pair of spaced apart but perforated walls are located above and spaced from the bottom wall of the tank forming an enclosure. Filter material is located between... | 05/24/1977 |
| 3998735 | Apparatus and method for separating a mother liquor into a concentrated particulate fraction and a filtrate fraction An apparatus provides for continuous filtration of a mother liquor and continuous removal of solids from the filter element so that the apparatus need not be shut down for cleaning or replacement of the filter element. The solids are separated from the mo... | 12/21/1976 |
| 3994810 | Onstream backflush filter This invention comtemplates a new and novel filtering device that comprises a plurality of parallel filter elements with means within the device for backflushing two or more of the filter elements without removing the elements from the device and while th... | 11/30/1976 |
| 3977970 | Apparatus for and method of filtering solid particles from a particulate-bearing liquid Waste water containing particulate matter is saturated with air or other gas by a dynamic mixer and ejected into a gravity filter system at a point above the filter media but below the water surface level. Upon entering the filter tank, the dissolved gas ... | 08/31/1976 |
| 3954613 | Filter apparatus A filter apparatus comprises a filter screen for filtering liquid carrying solids to remove at least some of the solids from the liquid. A nozzle is arranged adjacent the filter screen for removing solids deposited on the filter screen during a filtering ... | 05/04/1976 |
| 3948773 | Automatic control for filtering equipment under pressure Filter backwash means for automatically backwashing a filter when increase of pressure indicates that the filter is starting to block, wherein a reversing valve is arranged to reverse water flow through the filter to wash out the blocking particles (mud a... | 04/06/1976 |
| 3944488 | Self-cleaning filter with motor incorporated therewith This invention relates to a self-cleaning filter formed of an assembly of filtering elements fed in parallel, a rotary distributor enabling the feed of a series of filtration chambers to be cut off, wherein the distributor is driven by a hydraulic motor f... | 03/16/1976 |
| 3936378 | Rotary strainer A rotary strainer comprising a revolving box-like structure having a horizontal axis of revolution and a filtering net stretched around the external periphery of said box-like structure, wherein a mixture of liquid and solids is introduced into said box-l... | 02/03/1976 |
| 3931009 | Water purification apparatus and timing device for initiating a backwashing cycle A water purification apparatus is disclosed having an aeration chamber for aerating unpurified water from a source. A filter chamber is provided beneath the aeration chamber containing granular media for filtering the aerated water and having spaced apart... | 01/06/1976 |
