Ostrolenk, Faber, Gerb & Soffen, LLP
Clearance means to prevent fuel leakage in a radial piston pump
 A pump for low-viscosity fuel comprises a pump shaft 6 installed in a pump housing 2, 3, 4 and divided into a drive-side shaft 6A and a driven-side shaft 6B, a partition 12 provided between the drive-side shaft and the driven-side shaft of the pump shaft to prevent leakage of fuel from the housing, and a magnetic coupling 13 for transferring torque from the drive-side shaft to the driven-side shaft of the pump shaft through the partition, the magnetic coupling being disposed such that a first clearance C1, D1 between the magnetic coupling and the partition is larger than a second clearance C2, D2 between the magnetic coupling and the pump housing. When wobble occurs in the pump shaft owing to wear of the sliding contact portions thereof, the magnetic coupling makes contact with the pump housing before contacting the partition, thereby enabling the rotation of the pump shaft to be stopped before fuel leakage occurs. 
Zexel Corporation
F
F04B
inventional
Tomoharu Ken Hideya Koichiro Takayuki Takeo Fujio Nobuo Katsuhiko
Sato Sato Kikuchi Futamase Ikeda Kushida Aoki Aoki Tsukazaki