Title:
注入装置
Document Type and Number:
Japanese Patent JP7215715
Kind Code:
B2
Abstract:
To provide an injection device in which smoothness in pumping is not lost even when an object to be injected is cement slurry.SOLUTION: An injection device 10 for injecting cement slurry comprises a reciprocating pump portion 12 including a cylinder portion 21 and a plunger portion 24 reciprocating with respect to the cylinder portion 21. The plunger portion 24 includes: a plunger body 71 reciprocating in a non-slide contact state with the cylinder portion 21; and two annular seal materials 73A and 73B mounted on the plunger body 71 and being in slide contact with the cylinder portion 21. An outer peripheral portion 73ab in a radial direction of each of the annular seal material 73A and 73B is formed to have a shape which moves forward so as to scrape out cement slurry stuck to an inner peripheral face of the cylinder portion 21.SELECTED DRAWING: Figure 2
Inventors:
Fujita Shogo
Application Number:
JP2018221625A
Publication Date:
January 31, 2023
Filing Date:
November 27, 2018
Export Citation:
Assignee:
fs technical corporation
International Classes:
E04F21/165; F04B15/02; F04B53/14
Domestic Patent References:
| JP2001003558A | ||||
| JP2018172547A | ||||
| JP60177256U | ||||
| JP1247770A |
Attorney, Agent or Firm:
Patent Attorney Corporation Shinryo International Patent Office
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