{
  "$type": "site.standard.document",
  "description": "A resin piston for center-valve-type hydraulic master cylinder is movably inserted into a cylinder hole of the hydraulic master cylinder and defines a hydraulic pressure chamber to the cylinder hole. A recessed groove (17) is formed on the hydraulic pressure chamber side of a guide hole (16). It…",
  "path": "/patents/1087356",
  "publishedAt": "2004-05-06T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B29C45/0025",
    "NISSIN KOGYO KK [JP]"
  ],
  "textContent": "A resin piston for center-valve-type hydraulic master cylinder is movably inserted into a cylinder hole of the hydraulic master cylinder and defines a hydraulic pressure chamber to the cylinder hole. A recessed groove (17) is formed on the hydraulic pressure chamber side of a guide hole (16). It has a width smaller than radius of a guide pin (5) extending in the radial direction of the piston. A resin piston for center-valve-type hydraulic master cylinder is movably inserted into a cylinder hole of the hydraulic master cylinder and defines a hydraulic pressure chamber to the cylinder hole. It has a guide pin penetrating through the piston middle portion is formed in its radial direction is formed. A guide pin disposed to cross the cylinder hole is inserted into the guide hole. A valve storage hole (18) is formed on the hydraulic pressure chamber side of the piston to penetrate in the axial direction of the piston. The hydraulic pressure chamber and the guide hole are allowed to connect with each other through the valve storage hole. A recessed groove is formed on the hydraulic pressure chamber side of a guide hole. It has a width smaller than radius of a guide pin extending in the radial direction of the piston. The valve storage hole is opened in the hydraulic-pressure-chamber-side surface of the recessed groove.",
  "title": "Resin piston for center-valve-type hydraulic master cylinder and molding die therefor"
}