Patent ID: 7296984

Claim:
A gear pump comprising: a housing defining an accommodating chamber; a seal plate for sealing the accommodating chamber, the seal plate including a first side surface and a second side surface; a drive gear and a driven gear received in the accommodating chamber; a first urging member formed at the first side surface of the seal plate, the first urging member urging the seal plate toward the housing; a second urging member deployed between the seal plate and the housing, the second urging member urging the seal plate in a direction opposed to the urging direction of the first urging member by an urging force smaller than the urging force of the first urging member; and an annular seal member provided at the second side surface of the seal plate to seal between a peripheral portion of the housing and a peripheral portion of the seal plate, wherein the second urging member is arranged in the seal member, the second urging member includes an annular portion extending concentric with the seal member and a plurality of spring portions extending form the annular portion, and each of the spring portions includes a distal portion extending along the annular portion and slanted in an axial direction of the annular portion.