Title:
SELF-SEAL TYPE DOUBLE-PIPE JOINT
Document Type and Number:
WIPO Patent Application WO/1998/033002
Kind Code:
A1
Abstract:
Simultaneous opening/closing of the passages of inside and outside pipes without mixing of air with a coolant, in a self-seal type double-pipe joint in which cylindrical partition walls (12, 22) are fixed in male and female external cover cylinders (11, 21) to form double passages of the inside and outside, and movable valves (31, 41, 51) urged to the front end side by springs are arranged with an elastic seal material between the external cover wall and the cylindrical partition wall, and the cylindrical partition walls (12, 22) press to movable valves (31, 51, 41) by fitting the male and female external cover cylinders (11, 21) to independently allow the inner pipe passage (1) and the outer pipe passage (2) to communicate respectively. The partition wall (12), which presses the movable valve (31) to open/close the inner pipe passage (1) of the female external cover cylinder with the partition wall (22) of the male external cover cylinder (21) fixed and is fixed in the female external cover cylinder (11), brings the contact faces in the male and female external cover cylinders constituted of the front end face of the cylindrical partition and the front end face of the movable valve in close contact with each other, when pressing the cylindrical movable valve (41) to open/close the outer pipe passage (2).
Inventors:
TANIDA KOUICHI (JP)
Application Number:
PCT/JP1998/000284
Publication Date:
July 30, 1998
Filing Date:
January 22, 1998
Export Citation:
Assignee:
KYOSEKI SANGYO CO LTD (JP)
TANIDA KOUICHI (JP)
TANIDA KOUICHI (JP)
International Classes:
F16L39/00; (IPC1-7): F16L39/00
Foreign References:
| JPH0530687U | 1993-04-23 |
Attorney, Agent or Firm:
Okuda, Kazuo (5F 245-1 Shoushoui-cho, Ebisugawa-agaru,
Karasuma-douri, Nakagyo-k, Kyoto-shi Kyoto-fu 604, JP)
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