Patent US3559809A successfully refreshed from Google Patents.
US3559809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter back wash means
Assignee: Specialty Materials Inc
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Filing: 1969-02-07
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Granted: 1971-02-02
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Expires: 1989-02-07
Abstract
Abstract A Filtering System which is capable of handling large quantities of coolants and the System includes a reservoir for filtrates as, for example, from metal-working machines. The filtrate is returned to such machines by a pump which draws some of it from the reservoir, passes it through an eductor and then returns it to the reservoir. In operation, suction is applied to the outlet side of the filters to cause flow through them. In addition, valve means are provided so that the pump discharge can be used to clean the filters.
Inventors
- 👤 Stephen Barrett Barmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:58
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/0012; B01D21/0006; B01D21/02; B01D21/04; B01D21/24; B01D21/245; B01D21/30; B01D21/34; B01D29/00; B01D29/11; B01D29/114; B01D29/50; B01D29/52; B01D29/62; B01D29/66; B01D35/00; B01D35/12; B01D35/16; B01D2201/00; B01D2201/16; B01D2201/165
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
245 words
A filtering device of the class described comprising, a receptacle for fluid to be filtered, filter means located at least in part within said receptacle and having an outlet port, an eductor having an inlet port for admission of fluid at above ambient pressure, a suction port for admission of fluid at subambient pressure and a dIscharge port for discharging fluid entering said eductor and to direct it to a receiver for filtrate, a pump arranged to draw filtrate from said receiver and to discharge it from a pressure port, a fluid transport system comprising, a first duct running from said outlet port to said suction port, a second duct running from said pressure port to said inlet port, a third duct having at one end a junction with said first duct and having at another end a junction with said second duct, flow-diverting valves inserted in said ducts and constituting said junctions, said valves having a plurality of settings and being arranged so that at one setting filtrate discharged from said pump will pass to said outlet port to affect backwashing of said filter means and at another setting said filtrate discharge will pass through said eductor from said inlet port to said discharge port thereby creating a subambient pressure at said suction port and causing fluid to be drawn from said receptacle through said filter means and said outlet port to said eductor for discharge in the form of filtrate to said receiver.
Claim 2
Dependent Claim
245 words
A filtering device of the class described comprising, a receptacle for fluid to be filtered, filter means located at least in part within said receptacle and having an outlet port, an eductor having an inlet port for admission of fluid at above ambient pressure, a suction port for admission of fluid at subambient pressure and a dIscharge port for discharging fluid entering said eductor and to direct it to a receiver for filtrate, a pump arranged to draw filtrate from said receiver and to discharge it from a pressure port, a fluid transport system comprising, a first duct running from said outlet port to said suction port, a second duct running from said pressure port to said inlet port, a third duct having at one end a junction with said first duct and having at another end a junction with said second duct, flow-diverting valves inserted in said ducts and constituting said junctions, said valves having a plurality of settings and being arranged so that at one setting filtrate discharged from said pump will pass to said outlet port to affect backwashing of said filter means and at another setting said filtrate discharge will pass through said eductor from said inlet port to said discharge port thereby creating a subambient pressure at said suction port and causing fluid to be drawn from said receptacle through said filter means and said outlet port to said eductor for discharge in the form of filtrate to said receiver.
Claim 3
Dependent Claim
29 words
A device according to claim 1 wherein a flow-regulating valve is located in said first duct to control the flow of filtrate from said filter means to said eductor.
Claim 4
Dependent Claim
70 words
The device of claim 1 wherein said filter means comprises a plurality of elements each having a filtering system and an outlet port adapted for mechanical supporting and fluid-transmitting engagement with a manifold which comprises a portion of said first duct and is secured within said receptacle, said receptacle having a portion engaged by said elements at a point remote from said outlet port whereby said elements are completely supported.
Claim 5
Dependent Claim
33 words
The device of claim 3 wherein said filter means comprises a single group of said elements and each of said valves is a two-way valve constituting a toe-form junction with its associated ducts.
Claim 6
Dependent Claim
63 words
A device according to claim 3 wherein said elements comprise two separate groups each having its own manifold, said manifolds being tied together and with said first duct by a two-way valve suited to isolate either of said groups from flow-wise connection with said eductor as may be predetermined and wherein said last mentioned valve is not one of said flow diverting valves.
Claim 7
Dependent Claim
72 words
The device of claim 3 wherein said elements comprise two separate groups, each having its own manifold, said manifolds being joined together and with said first duct by a three-way valve constituting one of said flow-diverting valves and being suited to connect either of said groups to said eductor as may be predetermined and to connect the group not so predetermined to the other of said flow-diverting valves via said third duct.
Claim 8
Dependent Claim
39 words
The device of claim 3 characterized by said mechanical supporting and fluid transmitting engagement being effected by the interengagement of a tubular stub within an opening shaped and sized therefor, one of which interengaging ports constitutes said outlet port.
Claim 9
Dependent Claim
24 words
The device of claim 7 wherein an O-ring seal surrounds said stub and has sealing engagement therewith and with the boundary of said opening.
Claim 10
Dependent Claim
176 words
A filtering device comprising, a receptacle for fluid to be filtered, filter means located at least in part within said receptacle and having an outlet port, an eductor having an inlet port for admission of fluid at above-ambient pressure, a suction port for admission of fluid at subambient pressure and a discharge port for discharging fluid entering said eductor and to direct it to a receiver for filtrate, a pump arranged to draw filtrate from said receiver and discharge it from a pressure port, a fluid transport and flow regulating system comprising, a first duct running from said outlet port to said suction port, a second duct running from said pressure port to said inlet port, a third duct having a shutoff valve and extending from said discharge port and arranged and adapted to direct filtrate to said receiver, a fourth duct branched from said third duCt upstream of said shutoff valve and arranged to direct filtrate from said eductor to said receptacle and having valve means to permit or to prevent such discharge as desired.
Claim 11
Dependent Claim
176 words
A filtering device comprising, a receptacle for fluid to be filtered, filter means located at least in part within said receptacle and having an outlet port, an eductor having an inlet port for admission of fluid at above-ambient pressure, a suction port for admission of fluid at subambient pressure and a discharge port for discharging fluid entering said eductor and to direct it to a receiver for filtrate, a pump arranged to draw filtrate from said receiver and discharge it from a pressure port, a fluid transport and flow regulating system comprising, a first duct running from said outlet port to said suction port, a second duct running from said pressure port to said inlet port, a third duct having a shutoff valve and extending from said discharge port and arranged and adapted to direct filtrate to said receiver, a fourth duct branched from said third duCt upstream of said shutoff valve and arranged to direct filtrate from said eductor to said receptacle and having valve means to permit or to prevent such discharge as desired.
Claim 12
Dependent Claim
70 words
The device according to claim 9 wherein said filter means comprises a plurality of elements each having a filtering system and an outlet port adapted for mechanical-supporting and fluid-transmitting engagement with a manifold which comprises a portion of said first duct and is secured within said receptacle, said receptacle having a portion engaged by said elements at a point remote from said outlet port whereby said elements are completely supported.
Claim 13
Dependent Claim
37 words
The device according to claim 10 wherein said mechanical-supporting and fluid-transmitting engagement is effected by the interengagement of a tubular stub within an opening shaped and sized therefor, one of which interengaging ports constitutes said outlet port.
Claim 14
Dependent Claim
25 words
The device according to claim 11 wherein an O-ring seal surrounds said stub and has sealing engagement therewith and within the boundary of said opening.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |