Patent ID: 8672657
Filing Date: 2014-03-18
Classification: F01C,F04C

Abstract:
1. A double gear pump comprising: a drive gear; two driven gears that are oppositely arranged with the drive gear therebetween; a first bearing that supports a drive shaft of the drive gear; and second and third bearings that support rotating shafts of the two driven gears, wherein the first bearing length is formed shorter than the second and third bearing lengths, the first bearing includes a pair of first bearing portions that are oppositely arranged with the drive gear therebetween, the pair of first bearing portions of the first bearing having the same length in the shaft direction, the second bearing includes a pair of second bearing portions that are oppositely arranged with a first driven gear therebetween, the third bearing includes a pair of third bearing portions that are oppositely arranged with a second driven gear therebetween, the pair of second bearing portions of the second bearing and the pair of third bearing portions of the third bearing having the same length in the shaft direction, and the length of the pair of first bearing portions of the first bearing in the shaft direction is shorter than the length of the pair of second bearing portions of the second bearing and the pair of third bearing portions of the third bearing in the shaft direction.