{
  "$type": "site.standard.document",
  "description": "In a high pressure fuel supply pump for transmitting rotation of a cam 7 to a reciprocating plunger 2 via a tappet 6 and a retainer 3, a diametric force acting on the plunger 2 is reduced. The high pressure fuel supply pump includes the retainer 3 disposed on the plunger 2 and a return spring 4…",
  "path": "/patents/1000232",
  "publishedAt": "2012-07-18T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02M59/102",
    "HITACHI AUTOMOTIVE SYSTEMS LTD [JP]"
  ],
  "textContent": "In a high pressure fuel supply pump for transmitting rotation of a cam 7 to a reciprocating plunger 2 via a tappet 6 and a retainer 3, a diametric force acting on the plunger 2 is reduced. The high pressure fuel supply pump includes the retainer 3 disposed on the plunger 2 and a return spring 4 exerting an urging force on the retainer 3 in a direction of the tappet 6. A clearance between a plunger leading end 201 and a tappet bottom surface 601 opposed thereto is set to be greater than a clearance between a retainer bottom surface 301 and the tappet bottom surface 602 opposed thereto, and a clearance between a retainer inside diameter section 302 and a plunger peripheral surface section 203 opposed thereto is set to be greater than a clearance between a retainer outside diameter section 303 and a tappet inner wall 603 opposed thereto. The foregoing arrangements make a plunger diametric force involved in flexural deformation or shear deformation of the spring 4 less easy to be transmitted to the plunger 2. As a result, a fault of the plunger 2 galling a cylinder inner wall 2A can be reduced.",
  "title": "High pressure fuel supply pump"
}