Liquid purification or separation – With drip – overflow or content draining feature
Reexamination Certificate
2002-03-26
2004-04-13
Reifsnyder, David A. (Department: 1723)
Liquid purification or separation
With drip, overflow or content draining feature
C210S787000, C210S806000, C210S295000, C210S304000, C210S416100, C210S446000, C210S499000
Reexamination Certificate
active
06719900
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates generally to agricultural or industrial water filters.
2. Description of Related Art
Fields, “
Filter Screen Device,”
U.S. Pat. No. 4,495,072 (1985), is directed to an agricultural or industrial filter having the inlet and outlet at a shallow angle relative to the filter housing with the configuration causing the liquid passing therethrough to spiral over the outer face of the filter screen. The filter device has a housing with the inlet and outlet. The inner end of the inlet is provided with an opening which is an elongated oval and one side is provided with a lip. The lip has the effect of projecting liquid passing from the inlet into the annular space against the filter screen at an angle to assure that such liquid spirals down the length of the screen for maximum contact.
Thompson, “
Cistern Filter,”
U.S. Pat. No. 111,701 (1871) is directed to a cistern filter having an optional wire gauze cone D that may, if desired, be fitted into flange or rim b to serve to prevent leaves and similar obstructions from covering the filter and preventing obstruction.
Richmond, “
Clog Resistant Water Valve Inlet Screen with Ribs,”
U.S. Pat. No. 5,545,318 (1996), is directed to a clog-resistant water valve inlet screen with ribs that hold large particles and allow water to flow around the particles and the ribs increase the turbulence of the water flow, reducing the stability of the contaminants lodged in the ribs encouraging them away from the openings, encouraging the particles to accumulate at the downstream end of the inlet screen, leaving the upstream end of the inlet with fewer obstructions to block the free flow of water.
Okouchi et.al., “
Apparatus for Removing Foreign Matters from Condenser Cooling Water,”
U.S. Pat. No. 4,543,188 (1985), is directed to a water filter connected tangentially to the input so as to have a swirling flow across the filter surface and is provided with a reverse direction swirling flow depending on the opening of the inlet butterfly valve.
Keller, “
Strainer and Method for Separating Solid Particles from a Liquid,”
U.S. Pat. No. 5,897,787 (1999), is directed to a strainer for separating solid particles from a liquid. The strainer is an inlet and a separator in the form of a cylindrical basket that has a conical shape that extends up in the center that will trap particles removed from the fluid and prevent them from returning to the inlet when the system is shut down. When the basket is removed from its chamber, spillage of any fluid accumulated will be minimized.
Schmidt Jr., “
Filter Apparatus,”
U.S. Pat. No. 3,695,443 (1972), is directed to a filter apparatus having a plurality of sleeves and two end members that provide flow control requiring the liquid passing through the outer tube and sleeve has to go downwardly along the outer surface of the core and up through the hollow cavity in the core during a filtering operation and in reverse during cleaning. The tube filter in the tank has tubes having an externally ribbed tubular plastic core with ribs and holes. Members are fitted over the core and a sleeve and a filter cake supporting tube.
BRIEF SUMMARY OF THE INVENTION
The invention is an improved Y-branched agricultural or industrial water filter. The agricultural or industrial water filter comprises a spin plate, a flow distributing sleeve, and a cone basin. The filter includes a cylindrical filter screen disposed within a filter chamber or barrel. The filter screen may be oversized so as to provide a filter area that is multiple of the screen areas of standard filter screens.
The spin plate is disposed at the inlet end of the filter where water first enters the filter. The spin plate includes fluid passageways comprising apertures formed in a disk and nozzle holes defined by nozzles extending from the bottom surface of the disk. The fluid passageways are disposed at an approximately 20 degree angle relative to the axis of the filter, which is perpendicular to the plane defined by the disk. The fluid passageways direct the water jets to a more oblique angle relative to the filter screen so that entrained sand and grit obliquely flows or impinges on the filter screen at a glancing angle. The nozzles still impart a rotational motion in the system to the water and entrained sand, grit and particles.
The flow distributing sleeve is disposed around the screen in between the screen and the filter chamber. The side of the flow sleeve more closely positioned to the outlet is defined as the proximal side. The side of the flow sleeve opposite the proximal side is defined as the distal side. A wall of the flow sleeve includes multiple wide portions which are spaced closely together at the proximal side of the flow sleeve and narrow portions which are spaced further apart at the distal side of the flow sleeve. An aperture or opening is disposed at the distal side to allow a greater amount of filtered water to pass through. Alternatively stated, the flow sleeve comprises a plurality of axial slots defined in the cylindrical wall of the sleeve, which slots are more narrow at the proximal side of the flow sleeve to decrease the flow of water therethrough and which are wider at the distal side of the flow sleeve to allow more water to flow through. The flow sleeve creates a pressure differential which allows for a more uniform flow of water throughout the circumference of the filter screen.
The end cap is coupled to a bottom of the filter chamber and is disposed adjacent to a bottom of the screen. The end cap comprises a cone coupled to the top of a basin. The cone extends upwardly into the space within the screen. The rotating water is forced toward a larger radius by the cone, thereby serving to impart a higher centrifugal force to the more massive sand grains and particles entrained in the water. This serves to separate out those particles into the trap provided by the cone basin. A narrow annulus with a small cross-sectional area is formed between the bottom edge of the cone and the top of the basin. The basin includes a flush tube to flush out sand, grit and particles collected in the basin and to cause a high velocity flow through the annulus.
In conclusion, an agricultural or industrial water filter comprises a spin plate, a flow distributing sleeve, and a cone basin. The spin plate includes fluid passageways disposed at an approximately 20 degree angle relative to the axis of the filter. The flow distributing sleeve is disposed in between the screen and the filter chamber. The screen may be oversize with a screen area that is multiple times the screen area of a standard screen. The sleeve comprises a plurality of axial slots which are more narrow at the proximal side and wider at the distal side. The end cap is coupled to a bottom of the filter chamber and disposed adjacent to a bottom of the screen. The end cap comprises a cone coupled to the top of a basin. The cone extends upwardly into the space within the screen. A narrow annulus with a small cross-sectional area is formed between the bottom edge of the cone and the top of the basin. The basin includes a flush tube to flush out particles collected in the basin and to cause a high velocity flow through the annulus.
The invention is also a method of filtering agricultural or industrial water using the improved Y-branch filter briefly described above and in more detail below. In general, the method comprises the steps of flowing water through a nozzle plate or disk to create a swirling motion into the cylindrical volume of a screen filter such that the water flow is glanzing or almost tangential to the surface of the screen. The swirling particulate matter is flowed downward into the cylindrical volume of a screen filter into an annular slot with the assistance of a separation cone extending into the cylindrical volume of a screen filter at the base of the cylindrical volume. Separated particulate matter forced through the slot is then collected into a lower basin where it is removed from the flow pattern in the cylindrical
Agricultural Products, Inc.
Dawes Daniel L.
Myers Dawes Andras & Sherman LLP
Reifsnyder David A.
LandOfFree
Agricultural or industrial spin filter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Agricultural or industrial spin filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Agricultural or industrial spin filter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3266853