Patent US5085771A successfully refreshed from Google Patents.
US5085771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal filter casing
Assignee: Individual
•
Filing: 1991-05-15
•
Granted: 1992-02-04
•
Expires: 2011-05-15
Abstract
Abstract A liquid filter comprising a casing having a feed pipe, at least a drain pipe and at least a flushing pipe respectively fastened at different level positions, at least a circular filter and at least a rotary wire brush device. Feeding liquid which is pumped through the feed pipe along the inner wall into the casing is induced by the drain pipe and stirred by the wire brush device to rotate inside the casing permitting the mid-stream of the rotating liquid to penetrate through the circular filter. The filter has a smooth, elastic, convex outer surface which prevents fibrous or other debris from attaching thereto, form mid-stream osmosis filtration effect under straining rotation fluid at constant flowing pressure. Filtered liquid is partly pumped into the casing to flush the smooth, elastic, convex outer surface of the circular filter form different straining fluid pressure on the straining media while the brushing wires of the revolving axle of the brush holder are carried to pat on the smooth, elastic, convex outer surface of the circular filter causing fibrous or other debris to be shaken away from the circular filter toward the low liquid pressure area at the bottom of the casing around the drain pipe for discharging out of the casing through the drain pipe so as to keep straining media clean during straining or after filtration and to obtain constant filtration effect.
Inventors
- 👤 Tien-Hung Huang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:27
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/01; B01D29/05; B01D29/07; B01D29/071; B01D29/11; B01D29/13; B01D29/15; B01D29/50; B01D29/52; B01D29/62; B01D29/64; B01D29/6407; B01D29/6415; B01D29/6438; B01D29/66
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
530 words
A liquid filter, comprising a cylindrical casing disposed in vertical position having a top opening, a flange around said top opening, said flange having a plurality of screw rods at the top, a circular top cover fastened on the screw rods of said flange by lock nuts to block up said top opening, a cylindrical bottom projection vertically extending downwards at the bottom, a small drain pipe transversely extending from said cylindrical bottom projection for discharging water or liquid out of said cylindrical casing, a first ring-shaped division plate transversely internally disposed at an upper position, said first ring-shaped division plate having a plurality of screw rods at the top, a second ring-shaped division plate transversely internally disposed at a position below said first ring-shaped division plate, said first ring-shaped division plate defining therein a circular passage in diameter slightly smaller than the circular passage defined within said second ring-shaped division plate, said first and second ring-shaped division plates being to divide the holding space of said cylindrical casing into a first filtration chamber at the bottom, a second filtration chamber at the middle and a post-filtration chamber at the top, a feed pipe having a terminal end transversely inserted in said first filtration chamber, said terminal end having an outlet hole at one side to guide water or liquid to flow along the inner wall of said cylindrical casing, a flushing pipe transversely inserted in said second filtration chamber, an outlet pipe transversely fastened in said post-filtration chamber, a perforated cylinder set in said first filtration chamber, said perforated cylinder having a top flange mounted on the screw rods on said first ring-shaped division plate and locked in place by lock nuts, a cylindrical wire gauze filter disposed in said first filtration chamber covering over said perforated cylinder, a perforated convex metal plate fixedly secured to said perforated cylinder at the top with a circular filter firmly retained therebetween, said circular filter having a smooth, elastic, convex filtration surface disposed at the bottom, wherein said drain pipe is relatively much smaller than said feed pipe so that feeding water or liquid at lower pressure which is continuously pumped through said feed pipe along the inner wall of said cylindrical casing into said first filtration chamber can be gradually accumulated inside said cylindrical casing and induced by said drain pipe to rotate in said cylindrical casing so as to form a lower constant flowing fluid pressure permitting the mid-stream of the accumulated rotating flow of water or liquid to continuously penetrate through said cylindrical wire gauze filter, said perforated cylinder, said circular filter and said convex perforated plate into said post-filtration chamber and then discharge out of said cylindrical casing through said outlet pipe, so as to form mid-stream osmosis filtration effect in straining rotation fluid at constant fluid pressure; filtered water or liquid is partly pumped into said second filtration chamber through said flushing pipe to flow downwards along the outer surface of said cylindrical wire gauze filter so as to move fibrous or other debris away from said cylindrical wire gauze to discharge through said drain pipe, so as to form different fluid pressure on the straining media.
Claim 2
Dependent Claim
530 words
A liquid filter, comprising a cylindrical casing disposed in vertical position having a top opening, a flange around said top opening, said flange having a plurality of screw rods at the top, a circular top cover fastened on the screw rods of said flange by lock nuts to block up said top opening, a cylindrical bottom projection vertically extending downwards at the bottom, a small drain pipe transversely extending from said cylindrical bottom projection for discharging water or liquid out of said cylindrical casing, a first ring-shaped division plate transversely internally disposed at an upper position, said first ring-shaped division plate having a plurality of screw rods at the top, a second ring-shaped division plate transversely internally disposed at a position below said first ring-shaped division plate, said first ring-shaped division plate defining therein a circular passage in diameter slightly smaller than the circular passage defined within said second ring-shaped division plate, said first and second ring-shaped division plates being to divide the holding space of said cylindrical casing into a first filtration chamber at the bottom, a second filtration chamber at the middle and a post-filtration chamber at the top, a feed pipe having a terminal end transversely inserted in said first filtration chamber, said terminal end having an outlet hole at one side to guide water or liquid to flow along the inner wall of said cylindrical casing, a flushing pipe transversely inserted in said second filtration chamber, an outlet pipe transversely fastened in said post-filtration chamber, a perforated cylinder set in said first filtration chamber, said perforated cylinder having a top flange mounted on the screw rods on said first ring-shaped division plate and locked in place by lock nuts, a cylindrical wire gauze filter disposed in said first filtration chamber covering over said perforated cylinder, a perforated convex metal plate fixedly secured to said perforated cylinder at the top with a circular filter firmly retained therebetween, said circular filter having a smooth, elastic, convex filtration surface disposed at the bottom, wherein said drain pipe is relatively much smaller than said feed pipe so that feeding water or liquid at lower pressure which is continuously pumped through said feed pipe along the inner wall of said cylindrical casing into said first filtration chamber can be gradually accumulated inside said cylindrical casing and induced by said drain pipe to rotate in said cylindrical casing so as to form a lower constant flowing fluid pressure permitting the mid-stream of the accumulated rotating flow of water or liquid to continuously penetrate through said cylindrical wire gauze filter, said perforated cylinder, said circular filter and said convex perforated plate into said post-filtration chamber and then discharge out of said cylindrical casing through said outlet pipe, so as to form mid-stream osmosis filtration effect in straining rotation fluid at constant fluid pressure; filtered water or liquid is partly pumped into said second filtration chamber through said flushing pipe to flow downwards along the outer surface of said cylindrical wire gauze filter so as to move fibrous or other debris away from said cylindrical wire gauze to discharge through said drain pipe, so as to form different fluid pressure on the straining media.
Claim 3
Dependent Claim
395 words
A liquid filter, comprising a hollow, cylindrical casing set in horizontal position, said hollow cylindrical casing having two openings at two opposite end, two flanges respectively disposed around said two openings, two circular cover plates respectively fastened to said two flanges to tightly block up said two openings, two ring-shaped division plates fastened inside said hollow, cylindrical casing at two opposite ends dividing the holding space of said hollow, cylindrical casing into a filtration chamber at the middle and two post-filtration chambers at two opposite ends, two outlet pipes vertically fastened in said hollow, cylindrical casing at the top and respectively in communication with said two post-filtration chamber, a first rectangular channel longitudinally made on said hollow cylindrical casing at the top, a second rectangular channel longitudinally made on said hollow cylindrical casing at the bottom, a small floating dust guide tube vertically fastened in said first rectangular channel at the middle, two flushing pipes vertically fastened in said first rectangular channels at two opposite ends, two drain pipes vertically extending downwards from said second rectangular channel at two opposite ends, a feed pipe transversely fastened in said cylindrical casing at one side, said feed pipe being made in caliber much larger than said drain pipes, two convex perforated metal plates respectively attached to said two opposite, ring-shaped division plates with a circular filter each firmly retained therebetween, said circular filter having a smooth, elastic, convex filtration surface respectively disposed toward said filtration chamber, wherein continuous feeding water or liquid at lower pressure from said feed pipe flows along the inner wall of said hollow, cylindrical casing upwards toward said first channel and downwards toward said second channel and induced by said drain pipes to form into rotating flow of water or liquid gradually accumulated in said filtration chamber permitting the mid-stream of the rotating flow of water thus formed to respectively penetrating through said circular filters into said two post-filtration chambers to further discharge out of said hollow, cylindrical chamber and simultaneously, filtered water or liquid is partly pumped into said flushing pipes to respectively flow downwards along the smooth, elastic, convex filtration surface of said circular filters so as to carry fibrous or other debris away from said circular filters to discharge out of said hollow, cylindrical casing through said drain pipes so as to form different fluid pressure on the straining media.
Claim 4
Dependent Claim
395 words
A liquid filter, comprising a hollow, cylindrical casing set in horizontal position, said hollow cylindrical casing having two openings at two opposite end, two flanges respectively disposed around said two openings, two circular cover plates respectively fastened to said two flanges to tightly block up said two openings, two ring-shaped division plates fastened inside said hollow, cylindrical casing at two opposite ends dividing the holding space of said hollow, cylindrical casing into a filtration chamber at the middle and two post-filtration chambers at two opposite ends, two outlet pipes vertically fastened in said hollow, cylindrical casing at the top and respectively in communication with said two post-filtration chamber, a first rectangular channel longitudinally made on said hollow cylindrical casing at the top, a second rectangular channel longitudinally made on said hollow cylindrical casing at the bottom, a small floating dust guide tube vertically fastened in said first rectangular channel at the middle, two flushing pipes vertically fastened in said first rectangular channels at two opposite ends, two drain pipes vertically extending downwards from said second rectangular channel at two opposite ends, a feed pipe transversely fastened in said cylindrical casing at one side, said feed pipe being made in caliber much larger than said drain pipes, two convex perforated metal plates respectively attached to said two opposite, ring-shaped division plates with a circular filter each firmly retained therebetween, said circular filter having a smooth, elastic, convex filtration surface respectively disposed toward said filtration chamber, wherein continuous feeding water or liquid at lower pressure from said feed pipe flows along the inner wall of said hollow, cylindrical casing upwards toward said first channel and downwards toward said second channel and induced by said drain pipes to form into rotating flow of water or liquid gradually accumulated in said filtration chamber permitting the mid-stream of the rotating flow of water thus formed to respectively penetrating through said circular filters into said two post-filtration chambers to further discharge out of said hollow, cylindrical chamber and simultaneously, filtered water or liquid is partly pumped into said flushing pipes to respectively flow downwards along the smooth, elastic, convex filtration surface of said circular filters so as to carry fibrous or other debris away from said circular filters to discharge out of said hollow, cylindrical casing through said drain pipes so as to form different fluid pressure on the straining media.
Claim 5
Dependent Claim
160 words
A liquid filter according to claim 1, wherein said further comprises a brush means driven by a speed reducing motor to stir feeding water or liquid at high fluid pressure to rotate so as to produce centrifugal effect, and simultaneously to pat on said circular filter or said cylindrical wire gauze filter to shake fibrous or other debris away from said circular filter or said cylindrical wire gauze filter so as to keep the straining media clean during straining or after filtration, said brush means comprising a brush holder having a revolving axle set therein and fastened with a plurality of brushing wires, said revolving axle having a bevel gear fixedly attached thereto and engaged with a fixed bevel gear inside said cylindrical casing permitting said revolving axle to be rotated relative to said brush holder when said brush holder is driven by said speed reducing motor to rotate relative to said circular filter or said cylindrical wire gauze filter.
Claim 6
Dependent Claim
127 words
A liquid filter according to claim 1, wherein said circular filter is comprised of a circular, convex, elastic non-woven cloth covered inside a circular, smooth filter cloth covering which has a smooth, convex outer surface, said smooth, elastic convex outer surface to slide fibrous or other debris to the peripheral area preventing fibrous or other debris not easy to adhering to or matting on the meshes of said circular filter, the elastic property of said circular, flexible non-woven cloth preventing the straining media of said circular filter from being forced by liquid pressure to expand or to let dirts or solid substances bigger than the mesh to pass through said circular filter and, producing stronger shock waves upon to shake off dirts upon striking force applied thereto.
Claim 7
Dependent Claim
142 words
A liquid filter according to claim 1, wherein said circular filter has a smooth, elastic, convex outer surface bearing different liquid pressure during filtration process, while continuous feeding liquid or water is guided through said feed pipe to flow over the smooth, elastic, convex outer surface of said circular filter and induced by said drain pipe to release liquid pressure and, filtered liquid or water is partly pumped through said flushing pipe to flush the smooth, elastic, convex outer surface of said circular filter, permitting fibrous or other debris on the smooth, elastic, convex outer surface of said circular filter to be guided to slide toward said drain pipe for discharging out of said cylindrical casing and preventing fibrous or other debris from matting or entangling itself on the straining media in the smooth, elastic, convex outer surface of said circular filter.
Claim 8
Dependent Claim
256 words
A liquid filter according to claim 5, wherein said circular filter has a smooth, convex outer surface to bear different liquid pressure in any of a variety of manners that can apply to slide fibrons or other debris out of surface of circular filter by feeding or flushing water during straining or after filtration including: (a) Feeding liquid or water is pumped through said feed pipe into said cylindrical casing to directly flow downward through the smooth, elastic, convex outer surface of said circular filter toward said drain pipe for relieving the pressure; (b) Feeding liquid or water is pumped through said feed pipe into said cylindrical casing to directly flow toward the center part of said circular filter permitting feeding flow of liquid or water to flow around the smooth, elastic, convex outer surface of said circular filter wherein there is provided means for relieving the pressure; (c) Filtered liquid or water is partly pumped through said flushing pipe into said cylindrical casing to directly flow toward the center part of said circular filter permitting feeding filtrate to flow around the smooth, elastic, convex outer surface of said circular filter and then toward said drain pipe for relieving the pressure; (e) The circular filter has a flat or concave outer surface and feeding liquid or water is pumped through said feed pipe into said cylindrical casing to directly flow around the periphery of the flat or concave outer surface of the circular filter toward the center part thereof to which the drain pipe is connected.
Claim 9
Dependent Claim
38 words
A liquid filter according to claim 1, wherein said cylindrical casing has a spiral water guide made on the inner wall thereof to guide feeding liquid or water from said feed pipe to rotate toward said drain pipe.
Claim 10
Dependent Claim
102 words
A liquid filter according to claim 2, wherein said cylindrical casing has a spiral water guide made on the inner wall thereof symmetrically extending over two opposite ends to guide feeding liquid or water from said feed pipe to simultaneously rotate toward said two opposite drain pipes, also can do other way having a spiral water guide made on the round plate to set up near the surface of circular filter and on the feeding pipe fixed on the center of round plate to guide feeding water along the spiral guide and the surface of circular filter to rotate toward drain pipe.
Claim 11
Dependent Claim
121 words
A liquid filter according to claim 1, wherein continuous feeding liquid or water is guided through said feed pipe along the inner wall of said cylindrical casing and induced by said drain pipe under low flowing fluid pressure to rotate in said cylindrical casing and fill up the holding space defined therein permitting the mid-stream of the rotating flow of liquid or water, which contains less amount of solid particles or impurities due to centrifugal effect, to penetrate through said circular filter at constant liquid pressure without causing the open spaces in said circular filter to expand for passing bigger solid particles or impurities, so as to form mid-stream osmosis filtration effect during straining rotation fluid at constant flowing fluid pressure.
Claim 12
Dependent Claim
161 words
A liquid filter according to claim 2, wherein continuous feeding liquid or water is guided through said feed pipe along the inner wall of said cylindrical casing and induced by said drain pipes at low flowing fluid pressure to fill up the holding space in said cylindrical casing while the upper part of the continuous feeding liquid or water is continuously discharging out of said cylindrical casing through said floating dust guide tube at the top and the lower part of which is continuously discharging out of said cylindrical casing through said drain pipes, permitting the mid-stream of feeding liquid or water, which contains less amount of fibrous or other debris due to centrifugal effect, to penetrate through said circular filter at constant flowing fluid pressure without causing the open spaces in said circular filter to expand for passing bigger fibrous or other debris, so as to form mid-stream osmosis filtration effect during straining rotation fluid at constant flowing fluid pressure.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-03 | 1995-08-05 | 1996-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-03 | 1999-08-05 | 2000-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-03 | 2003-08-05 | 2004-02-04 | $7700.00 | Window Closed / Lapsed |