Decompression heat-insulating pipe structure

Patent metadata

Field	Value
Publication number	US-10711939-B2
Application number	US-201815862663-A
Country	US
Kind code	B2
Filing date	Jan 5, 2018
Priority date	Feb 8, 2017
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

A decompression heat-insulating pipe structure that can exhibit the desired heat-insulating performance and is easy to assemble. In the structure, a space between ends of inner and outer tubes is decompressed. The outer tube includes a first flange, which extends radially inward from an axially one end thereof, and a second flange, which extends radially outward from the axially other end thereof. The inner tube includes a third flange, which extends radially inward from an axially one end thereof and is opposed to the first flange at an axially inward position of the first flange, and a fourth flange, which extends radially outward from the axially other end thereof and being opposed to the second flange at an axially outward position of the second flange. First and second elastic seal members are disposed between the first and third flanges and between the second and fourth flanges, respectively.

First claim

What is claimed is:

1. A decompression heat-insulating pipe structure comprising:
an outer tube that includes a first flange and a second flange, the first flange extending radially inward from an axially one end of the outer tube, and the second flange extending radially outward from the axially other end of the outer tube;
an inner tube that includes a third flange and a fourth flange, the third flange extending radially inward from an axially one end of the inner tube and being opposed to the first flange at an axially inward position of the first flange, and the fourth flange extending radially outward from the axially other end of the inner tube and being opposed to the second flange at an axially outward position of the second flange; and
an elastic seal member disposed between ends of the inner tube and the outer tube to seal a space between the inner tube and the outer tube so that the space is decompressed, the elastic seal member includes a first elastic seal member and a second elastic seal member, the first elastic seal member being disposed between and in direct contact with each of the first flange and the third flange, and the second elastic seal member being disposed between and in direct contact with each of the second flange and the fourth flange.

2. The decompression heat-insulating pipe structure according to claim 1 , wherein at least one of the inner tube or the outer tube includes bellows, the bellows being configured to elongate or contract axially.

Assignees

• Toyota Motor Co Ltd

Inventors

• Yamashita Osamu

Classifications

• B65D81/3841

  formed with double walls, i.e. hollow · CPC title

• C21D1/773

  under reduced pressure or vacuum · CPC title

• F16L27/107

  the ends of the pipe being interconnected by a flexible sleeve · CPC title

• F16L51/00

  Expansion-compensation arrangements for pipe-lines (telescopic pipes F16L27/12) · CPC title

• F27D99/0073

  Seals · CPC title