Patent ID: 7591640

Claim:
A three gear type gear pump of a fuel supply system of a jet engine, comprising: a driving gear comprising a first side surface and a second side surface; a first driven gear positioned to be in a meshing engagement with the driving gear, and comprising a first side surface and a second side surface; a second driven gear positioned to be in a meshing engagement with the driving gear, and comprising a first side surface and a second side surface; a first stationary side plate positioned to touch in a sliding manner the first side surface of the driving gear, a second stationary side plate positioned to touch in a sliding manner the first side surface of the first driven gear, and a third stationary side plate positioned to touch in a sliding manner the first side surface of the second driven gear; and a first moveable side plate positioned to touch in a sliding manner the second side surface of the driving gear, a second moveable side plate positioned to touch in a sliding manner the second side surface of the first driven gear, and a third moveable side plate positioned to touch in a sliding manner the second side surface of the second driven gear, wherein the number of teeth of the driving gear is twice as large as the number of teeth of each of the first driven gear and the second driven gear, and wherein the first, second and third moveable side plates are pressed against the respective second side surfaces of the driving gear, the first driven gear and the second driven gear to prevent leakage.