{
  "$type": "site.standard.document",
  "description": "A fluid flow system includes a main valve having a spool (38), a first chamber (37, 137), and a second chamber (34, 134). A pressure difference between the first chamber (37, 137) and the second chamber (34, 134) is configured to move the spool (38) to control fluid flow. An electromechanical meter…",
  "path": "/patents/1399781",
  "publishedAt": "2025-01-01T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02C3/00",
    "HAMILTON SUNDSTRAND CORP [US]"
  ],
  "textContent": "A fluid flow system includes a main valve having a spool (38), a first chamber (37, 137), and a second chamber (34, 134). A pressure difference between the first chamber (37, 137) and the second chamber (34, 134) is configured to move the spool (38) to control fluid flow. An electromechanical meter interface device (EMID) is in fluid communication with at least one of the first and second chambers of the main valve. The EMID is configured to meter fluid from a first source and a second source to the at least one of the first chamber (37, 137) and the second chamber (34, 134). The first source has a different pressure from the second source. A fixed orifice is arranged between the main valve and the EMID. A fuel system for a gas turbine engine is also disclosed.",
  "title": "HYDRAULICALLY RATE LIMITED VALVE"
}