{
  "$type": "site.standard.document",
  "description": "A hydraulic brake master cylinder () for a vehicle braking system defines a first smaller fluid path () and a second larger fluid path () for connecting a working chamber () with a fluid reservoir at ambient pressure when the cylinder piston () is retracted and the brakes are not applied. A…",
  "path": "/patents/1249956",
  "publishedAt": "2019-12-12T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60T13/145",
    "AP Racing Limited"
  ],
  "textContent": "A hydraulic brake master cylinder () for a vehicle braking system defines a first smaller fluid path () and a second larger fluid path () for connecting a working chamber () with a fluid reservoir at ambient pressure when the cylinder piston () is retracted and the brakes are not applied. A pressure relief valve () normally closes the second fluid path but is arranged to open when subject to a pressure differential at or above a threshold value. The first fluid path allows a restricted return flow of fluid to the reservoir should a standard knock-back event occur. If a larger knock-back event occurs causing a fluid pressure spike at or above the threshold value, the pressure relief valve () opens to allow a higher volume return flow through the second fluid path to dissipate the pressure quickly.",
  "title": "HYDRAULIC MASTER CYLINDER, A VEHICLE BRAKING SYSTEM AND A VEHICLE"
}