Patent ID: 7600983

Claim:
A radial plunger pump comprising: a pump housing rotatably supporting a driving shaft and having a plurality of cylinder bores extending radially and arranged at substantially regular intervals around an outer periphery of the driving shaft, an inlet port sucking in fluid, and an outlet port discharging fluid; a plunger fitted in each cylinder bore to form a pump chamber and reciprocating in response to a rotation of the driving shaft; an inlet passage through which the inlet port communicates with the pump chamber; an outlet passage through which the pump chamber communicates with the outlet port; an inlet valve provided for each plunger which establishes and cuts off a communication between the inlet passage and the pump chamber in response to reciprocating motion of the plunger; and an outlet valve provided for each plunger which establishes and cuts off a communication between the pump chamber and the outlet passage in response to the reciprocating motion of the plunger, wherein the outlet passage has a plurality of outlet chambers each of which is formed by an attachment hole extending radially and accommodating each plunger, and each of which communicates with each pump chamber via each outlet valve, and wherein the outlet passage has a plurality of communication holes each of which extends from an inner side surface of each attachment hole in a direction that is not perpendicular to an axis line of the driving shaft, and outlet ends of the communication holes converge on one spot in the pump housing.