Strainer

{
  "publication_number": "US2005145551A1",
  "country": "US",
  "kind": "A1",
  "title": "Strainer",
  "abstract": "A conduit has a first end and interior and exterior surfaces extending downstream from the first end. A strainer has a first end and a second end. An upstream portion of the strainer is positioned engaging a projection on the interior surface of the conduit to resist downstream shifting of the strainer. A strainer body extends at least partially downstream of the upstream portion. The apparatus may be used as a strainer/coupler and may be used to filter water in a chiller apparatus.",
  "claims": [
    "1. A system comprising: a heat exchanger having first and second flows in thermal communication; and a first pump driving said first flow and having an inlet conduit for receiving the first flow and an outlet conduit coupled to the heat exchanger for delivering the first flow, wherein the inlet conduit comprises an assembly of: an upstream conduit; a downstream conduit, optionally integral with the first pump; an intermediate conduit; means for straining the first flow; and means for coupling the intermediate conduit to the upstream and downstream conduits.",
    "2. The system of claim 1 further comprising: a second pump driving said second flow an having an inlet conduit for receiving the second flow and an outlet conduit coupled to the heat exchanger for delivering the second flow, wherein the second pump inlet conduit comprises an assembly of: an upstream conduit; a downstream conduit, optionally integral with the second pump; an intermediate conduit; means for straining the second flow; and means for coupling the second pump intermediate conduit to the second pump upstream and downstream conduits.",
    "3. A system comprising: a heat exchanger having first and second flows in thermal communication; and a first pump driving said first flow and having an inlet conduit for receiving the first flow and an outlet conduit coupled to the heat exchanger for delivering the first flow, wherein the inlet conduit comprises an assembly of: an upstream conduit; a downstream conduit, optionally integral with the first pump; an intermediate conduit; a strainer at least partially within the intermediate conduit; and first and second clamps respectively coupling the intermediate conduit to the upstream and downstream conduits.",
    "4. A system comprising: a heat exchanger having first and second flows in thermal communication, the first flow consisting essentially of water; and a conduit assembly carrying the first flow and comprising: a first conduit; a second conduit downstream of the first conduit; a clamp securing the first conduit to the second conduit and having a first portion engaged to a clamping recess on the second conduit; a strainer at least partially within the second conduit and retained against downstream movement by engagement with an interior projection of the second conduit inboard of the recess.",
    "5. The system of claim 4 wherein: the strainer is entirely within the second conduit; the first conduit is an upstream conduit; there is a downstream conduit; the second conduit is an intermediate; and a second clamps couples the intermediate conduit to the downstream conduit.",
    "6. The system of claim 4 wherein: a third conduit extending through a sidewall of the second conduit and has a first portion in fluid communication with a downstream portion of the strainer and a second portion coupled to a valve for selectively establishing communication between the strainer and a destination external to the second conduit.",
    "7. The system of claim 4 wherein the strainer has: a sheet metal sleeve; and a strainer body comprising a frustoconical sidewall secured to said sheet metal sleeve and extending downstream of to a radially-extending end portion.",
    "8. The apparatus of claim 7 wherein: the strainer body consists essentially of a wire mesh."
  ],
  "description_excerpt": "This invention relates to fluid handling, and more particularly to the straining of aqueous heat transfer fluids in refrigeration systems.\n\nIndustrial refrigeration is a well developed field. Many systems involve transferring heat to or from an aqueous solution, often essentially water. The heat may be exchanged with a refrigerant passing along in a closed-loop refrigeration cycle. In many systems, the cooled fluid is water which may flow in a closed loop (e.g., for building or industrial cooling) or in an open loop (e.g., for consumption). In water-cooled chillers, the heated fluid is also water. It is advantageous to strain the fluid to prevent clogging of or damage to system components.\n\nOne aspect of the invention is an apparatus having a conduit and a strainer. The conduit has a first end, interior and exterior surfaces extending downstream from the first end, and a projection on the interior surface. The strainer has a first end and a second end. An upstream portion of the strainer is positioned to engage the conduit projection to resist downstream shifting of the strainer. A strainer body extends at least partially downstream of the upstream portion.\n\nThe apparatus may be used as a coupler for connecting first and second fluid conducting members and extending along an axis between the first end and a second end. The exterior surface proximate the conduit first and second ends may be adapted for connection to the first and second fluid conducting members. Such adaptation may comprise first and second recesses at first and second locations relatively close to the first end and to the second end, respectively.",
  "cpc": [
    "B01D 35/02",
    "B01D 2201/02",
    "B01D 29/117",
    "B01D 29/668",
    "F16L 55/24"
  ],
  "ipc": [
    "B01D 35/02"
  ],
  "inventors": [
    "Joseph Ballet",
    "Thierry Dujardin",
    "Andre Trigon"
  ],
  "filing_date": "2005-02-22",
  "publication_date": "2005-07-07",
  "priority_date": "2003-01-24",
  "application_number": "US-6341905-A",
  "family_id": "32594946",
  "cited_by_count": 8,
  "citations": [
    "US1782531A",
    "US1971120A",
    "US2658625A",
    "US2686596A",
    "US2893563A",
    "US3351352A",
    "US3700112A",
    "US4277952A",
    "US4725364A",
    "US5395524A",
    "US6592758B2"
  ]
}