Plunger pump, liquid feeding device, and liquid chromatography device
AssigneeKYOCERA Corporation
InventorKunihiro YAMABE
Life of this patent
Estimating the term…
Abstract
A plunger pump includes a cylinder having a cylinder chamber, and a first through hole and a second through hole that open from an inner circumferential surface toward an outer circumferential surface of the cylinder chamber, and a plunger inserted in the cylinder chamber and configured to make a reciprocating motion with respect to the cylinder chamber. An inner circumferential portion of the cylinder has an inner circumferential surface, and a helical first groove portion on the inner circumferential surface, the helical first groove portion being configured to communicate with at least one of the first through hole and the second through hole.
Claims22
A plunger pump comprising:
- a cylinder having a cylinder chamber, and a first through hole and a second through hole that open from an inner circumferential surface toward an outer circumferential surface of the cylinder chamber;
- and
- a plunger inserted in the cylinder chamber and configured to make a reciprocating motion with respect to the cylinder chamber, wherein
- an inner circumferential portion of the cylinder has an inner circumferential surface, and a helical first groove portion on the inner circumferential surface, the helical first groove portion being configured to communicate with at least one of the first through hole and the second through hole.
A plunger pump comprising:
- a cylinder having a cylinder chamber, and a first through hole and a second through hole that open on an inner circumferential surface and an outer circumferential surface of the cylinder chamber;
- and
- a plunger that has a front end portion with an outer circumferential surface provided with a notch portion, that is inserted in the cylinder chamber, and that is configured to make a reciprocating motion with respect to the cylinder chamber, wherein
- an outer circumferential portion of the plunger has an outer circumferential surface, and a helical first groove portion on the outer circumferential surface, the helical first groove portion being configured to communicate with at least one of the first through hole and the second through hole.
18-19. (canceled)
(canceled)
Dependencies are inferred from the claim text.