Conveying system

{
  "publication_number": "US8342774B2",
  "country": "US",
  "kind": "B2",
  "title": "Conveying system",
  "abstract": "A conveying system for conveying material having a tendency to stick, in particular a mobile conveying system for paving material used for constructing road mats has at least one conveying element which is accommodated in a conveying channel. The conveying element is directly or indirectly driven by at least one combustion engine. The conveying system has a primary heating device predominantly for the conveying element and/or the conveying system. Furthermore, the conveying system has at least one secondary heating device for at least partially relieving the primary heating device. The secondary heating device is operated with direct or indirect exit heat of the combustion engine. Alternatively, a combination of a primary heating device and at least one secondary heating device is provided, which secondary heating device is operated with exit heat originating from the combustion engine in order to at least partially relieve the primary heating device.",
  "claims": [
    "1. Conveying system for conveying paving material used for constructing road mats, comprising: at least one conveying element accommodated in a conveying channel and driven directly or indirectly by at least one combustion engine having an exhaust system, the combustion engine being encapsulated in an insulated engine station having at least one ambient air inlet opening facing the ground, a primary heating device for heating the conveying element, and an apparatus for conducting ambient air from the ambient air inlet and heat emitted by the combustion engine and the engine exhaust system without directly introducing gases from the exhaust system of the combustion engine to the conveying channel and for flushing the conveying element with the heated air to at least partially relieve the simultaneously operating primary heating device.",
    "2. A conveying system according to claim 1, the apparatus for conducting heat emitted by the combustion engine includes an engine exit air collecting and/or guiding system extending from the encapsulated combustion engine station into the region of the conveying element.",
    "3. A conveying system according to claim 1, wherein the primary heating device is functionally associated-to one side of the conveying element, and the apparatus for conducting ambient air and heat emitted by the combustion engine is functionally associated to the other-side of the conveying element.",
    "4. The conveying apparatus of claim 1, including a heat exchanger associated in the encapsulated combustion engine with the exhaust system of the combustion engine, the heat exchanger taking heat from the exhaust system emitted from the combustion engine in the exhaust gases and supplying heat taken from the exhaust system to the apparatus for conducting heat to the conveying channel.",
    "5. The conveying apparatus of claim 1, wherein the encapsulated combustion engine station contains an additional fan for flushing the conveying element with the heated air."
  ],
  "description_excerpt": "The present invention relates to a conveying system for conveying material having a tendency to stick, in particular a mobile conveying system for providing material used for constructing road mats. DE-U-295 19 718 discloses a mobile conveying system for feeding vehicles for road construction. The conveying system serves to transport e.g. bituminous and hot paving material on the conveying element. The conveying element and the paving material are heated during conveyance by a primary heating device. The primary heating device may be a heating device operating with liquid gas or electricity. Heating a conveying belt running on carrying rollers and deflection rollers reduces the tendency of the material to clog or stick at the conveying element and the rollers such that subsequent cleaning work is simpler and/or the frequency of the cleaning cycles can be reduced. In the case that the conveying system is driven by a combustion engine, the engine heat (form the cooling system and the exhaust system, and of other components which also generate heat) is emitted into the environment without being used.\n\nU.S. Pat. No. 7,300,225 B discloses heating the bottom of a channel of a conveying system in a vehicle transporting a hot bituminous paving material mixture by using a combustion engine such that combustible hot vapors of the paving material are sucked off and are mixed under positive feeding pressure with hot exhaust gases of the combustion engine and are burnt in a special combustion region.",
  "cpc": [
    "E01C 19/48",
    "B65G 69/20",
    "E01C 2301/04"
  ],
  "ipc": [
    "E01C 23/14"
  ],
  "assignees": [
    "JOSEPH VOEGELE AG",
    "FICKEISEN STEFFEN"
  ],
  "inventors": [
    "FICKEISEN STEFFEN"
  ],
  "filing_date": "2009-03-05",
  "publication_date": "2013-01-01",
  "grant_date": "2013-01-01",
  "priority_date": "2008-08-12",
  "application_number": "US-39840909-A",
  "family_id": "39829949",
  "citations": [
    "DD230990A1",
    "DE29519719U1",
    "JPH11209918A",
    "JPS61502197A",
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    "US2010104364A1",
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  ]
}