US4919801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for pump cycling
Assignee: Individual
•
Filing: 1988-01-07
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Granted: 1990-04-24
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Expires: 2008-01-07
Abstract
Abstract A filter unit using a bump-type filter is disclosed. Briefly stated, a chamber has a fluid inlet conduit so that contaminated fluid, upon entering the chamber, is directed upwardly towards filter tubes and downwardly towards the bottom of the chamber. The fluid flow is diverted during startup so as to be directed only downward. A bump handle is disposed between two fluid outlet conduits such that one is opened and the other is closed and the reverse when the bump handle is in a first or second corresponding position. A plurality of microswitches are utilized so that the pump is not enabled during bumping or when a dump valve is open, but is enabled during system operation or startup.
Inventors
- 👤 Russell Hobson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:03
CPC Classifications
B; B01; B01D; B01D37/00; B01D37/02; B01D29/00; B01D29/11; B01D29/114; B01D29/50; B01D29/52; B01D29/62; B01D29/66; B01D29/70; B01D29/88; B01D29/90; B01D29/904; B01D29/92; B01D35/00; B01D35/14; B01D35/153; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0446
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
A filter for filtering fluid flowing therethrough, comprising: a casing; at least one tube sheet dividing said casing into a lower chamber and an upper chamber and being vertically movable within said casing, said tube sheet having openings therethrough; a filter unit in each said opening in said tube sheet; at least one fluid outlet in said filtered chamber; fluid inlet means in said unfiltered chamber; tube sheet movement means external to said casing for moving said tube sheet, said means being disposable between at least a first position permitting said movement of said tube sheet and at least a second position prohibiting said movement of said tube sheet; and sensor means to determine the position o said movement means, for respectively prohibiting and permitting fluid flow through said filter when said movement means is respectively in said first and said second position.
Claim 2
Dependent Claim
143 words
A filter for filtering fluid flowing therethrough, comprising: a casing; at least one tube sheet dividing said casing into a lower chamber and an upper chamber and being vertically movable within said casing, said tube sheet having openings therethrough; a filter unit in each said opening in said tube sheet; at least one fluid outlet in said filtered chamber; fluid inlet means in said unfiltered chamber; tube sheet movement means external to said casing for moving said tube sheet, said means being disposable between at least a first position permitting said movement of said tube sheet and at least a second position prohibiting said movement of said tube sheet; and sensor means to determine the position o said movement means, for respectively prohibiting and permitting fluid flow through said filter when said movement means is respectively in said first and said second position.
Claim 3
Dependent Claim
27 words
A fluid according to claim 1, further comprising a second fluid outlet, disposed in said unfiltered chamber, for permitting the removal of fluid in said unfiltered chamber.
Claim 4
Dependent Claim
92 words
A fluid filter according to claim 2, wherein said second fluid outlet in said unfiltered chamber is comprised of a conduit and a valve, said valve being disposable between an open position and a closed position for permitting and prohibiting respectively the flow of fluid therethrough, and further comprising a second sensor means proximate said valve for determining when said valve is in said open position and said closed position, for respectively prohibiting and permitting fluid flow through said filter when said valve is respectively in said open and said closed position.
Claim 5
Dependent Claim
54 words
A fluid filter according to claim 3, wherein said fluid outlets are comprised of spring-biased pressure relief valves, said valves disposable between an open position for permitting the unencumbered flow of fluid therethrough, and a second position for permitting the flow of fluid therethrough when pressure exerted by the fluid exceeds a predetermined level.
Claim 6
Dependent Claim
33 words
A fluid filter according to claim 1, wherein said at least two fluid outlets are disposed in said filtered chamber said fluid outlets in coaction when at least one fluid outlet is open.
Claim 7
Dependent Claim
40 words
A filter fluid according to claim 1, further comprising a bracket means rigidly affixed to said casing for permitting the prohibiting movement of said tube sheet movement means, and wherein said sensor means is rigidly affixed to said bracket means.
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) | 1993-04-23 | 1993-10-23 | 1994-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-23 | 1997-10-23 | 1998-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-23 | 2001-10-23 | 2002-04-24 | $7700.00 | Window Closed / Lapsed |