Patent ID: 9506458
Filing Date: 2016-11-29
CPC Classification: F04B

Claim Text:
1. A liquid supply apparatus having a plurality of pump chambers and continuously discharging liquid by expanding and contracting the pump chambers at different timings, the apparatus comprising: a pump block in which a plurality of drive rods which expand and contract the respective pump chambers are mounted so as to be reciprocatable in an axial direction; a plurality of shafts corresponding to the respective driving rods, each of the shafts having a center part attached to a drive roller and having ends respectively attached to guide rollers, each of the shafts being mounted at a base end of a corresponding drive rod so as to be orthogonal to the longitudinal axis of the corresponding drive rod; a plurality of guide blocks mounted in the pump block and each provided with a guide groove for guiding a reciprocating movement of one of the guide rollers in the axial direction of the corresponding drive rod; and an interlocking member provided on a rotation shaft rotatably mounted in the pump block, the interlocking member driving each of the drive rollers to reciprocate in the axial direction in a phase-shifted manner, wherein each of the guide blocks has: a base to be fastened to the pump block; two pair of guide projections provided on the base, one pair forming a guide groove for one of the guide rollers, and the other pair forming a guide groove for the other of the guide rollers; a notch formed so as to be shifted in a circumferential direction with respect to the guide grooves, a screw member for fastening the guide block to the pump block and extending from the notch to the pump block, the base having an outer periphery and an inner periphery forming a through hole, the drive rod penetrating through the through hole and extending toward the corresponding pump chamber, and the notch extending from the inner periphery to the outer periphery.