| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the cost of a plunger pump by using an inexpensive material as a material for a filter member, to prevent the production of impurities and secure assembly workability in accomplishing it and to improve durability thereof. SOLUTION: The inner circumference of a base end-side collar part 42b of the filter member 42 is mounted to a support surface 45d of a cylinder 45. The outer circumference of a tip-side collar part 42t thereof is mounted to the inside surface 44h of a first step part 44f of a hole 44 for a pump by forming a clearance seal part 422 for preventing the intrusion of the impurities. The inner circumferences of both the collar parts 42b and 42t are installed by providing a space from the plunger 41.</p> |
