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Patent Searching and Data


Title:
PLUNGER PUMP
Document Type and Number:
Japanese Patent JPS6119983
Kind Code:
A
Abstract:

PURPOSE: To aim at improvements in abrasion resistance, by interconnecting a liquid suction chamber adjacently installed in packing at the pressure side to a liquid flow passage via a suction hole installed in a plunger, while letting a liquid to be filled up in the said chamber function as a lubricant for the packing.

CONSTITUTION: A liquid suction chamber 22 partitively formed among a plunger 20, an inner wall of a cylinder 10 and a pair of packing parts 14 and 16 is interconnected to a liquid flow passage 18 via a suction hole installed in the plunger 20. And, since the liquid suction chamber 22 is situated in position adjacent to packing 14 at the pressure side where wear is conspicuous in usual, a liquid to be filled up in the liquid suction chamber 22 by way of the suction hole 24 installed in the plunger 20 via the liquid flow passage 18 functions as a lubricant for the packing 14. With this constitution, abrasion resistance in the packing is strikingly improved. On top of that, its mechanical structure is very simple so that the promotion of low-unit cost of production is realizable.


Inventors:
SOBASHIMA SHIGEHARU
Application Number:
JP1984000141261
Publication Date:
January 28, 1986
Filing Date:
July 06, 1984
Export Citation:
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Assignee:
DAISHIN KK
International Classes:
F04B53/10; F04B53/12; (IPC1-7): F04B21/02; F04B21/04
Domestic Patent References:
JPS404921Y1