{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
    "ref": {
      "$link": "bafkreibjyaiejifxqf5dgw4mtiq2u53w3sdnp3tqsfvqgycuxiwywitmki"
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    "mimeType": "image/png",
    "size": 79731
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  "description": "Control drive has a working element electrically heated by a heating element, a housing containing expansion material, a working piston deployable out of the housing and a proportional stroke controller. A device for detecting a piston displacement position is connected to a regulator circuit that…",
  "path": "/patents/1112731",
  "publishedAt": "2001-05-30T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02G1/04",
    "BEHR THERMOT TRONIK GMBH & CO [DE]"
  ],
  "textContent": "Control drive has a working element electrically heated by a heating element, a housing containing expansion material, a working piston deployable out of the housing and a proportional stroke controller. A device for detecting a piston displacement position is connected to a regulator circuit that compares actual and demand piston positions to determine the supply of electrical energy to the heating element depending on the comparison result. The control drive has a working element that is electrically heated by a heating element (14), a housing containing an expansion material, a working position that can be deployed out of the housing and a proportional stroke controller for the piton. There is a device (17) for detecting the displacement position of the working piston (13) connected to a regulator circuit (16) that compares the detected actual piston position with a demand position and determines the supply of electrical energy to the heating element depending on the result of the comparison.",
  "title": "Drive control"
}