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|1. (WO2018056027) PLUNGER PUMP AND BRAKE DEVICE|
|Applicants:||HITACHI AUTOMOTIVE SYSTEMS, LTD.
|Title:||PLUNGER PUMP AND BRAKE DEVICE|
Provided is a plunger pump capable of ensuring quietness. The plunger pump is provided with a cylinder, a piston, a discharge valve, and a plug member. The plug member is provided with: a recessed part which is formed on a circumferential wall of a discharge chamber radially facing the outer periphery of the discharge valve; and a discharge passage which is formed in the circumferential wall of the discharge chamber radially facing the outer periphery of the discharge valve at a different position from the recessed part and connects the discharge chamber to the outside.