Accumulator

Patent metadata

Field	Value
Publication number	US-10465718-B2
Application number	US-201615570937-A
Country	US
Kind code	B2
Filing date	Jun 16, 2016
Priority date	Jun 22, 2015
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

An accumulator has a pressure vessel, a partition portion comparting an internal space of the pressure vessel into a gas chamber having sealed gaseous matter and a liquid chamber having introduced liquid, and a bellows connected to the partition portion. The partition portion is provided with a bellows connection portion connected to the bellows, a seal arranged in a liquid chamber side of the bellows connection portion, and a seal retention portion fixed to the bellows connection portion and retains the seal. The seal retention portion is constructed by a leaf spring which is elastically deformable in a part thereof, and is structured by integrally forming a fixed portion fixed to the bellows connection portion, and a retention portion retaining the seal. Accordingly, the accumulator can reduce the number of parts of a pressure fluctuation absorbing mechanism, can be easily assembled, and can reduce a parts cost.

First claim

What is claimed is:

1. An accumulator comprising:
a pressure vessel;
a partition that divides an internal space of the pressure vessel into a gas chamber in which gaseous matter is sealed and a liquid chamber to which liquid is introduced;
a bellows connected to a bellows connection surface of the partition;
a seal which is arranged on a liquid chamber side of the partition, the seal having a first major surface that faces the gas chamber, an opposite second major surface that faces the liquid chamber, and a side surface that connects the first major surface and the second major surface; and
a seal retention member that is fixed to the bellows connection surface of the partition and retains the seal;
wherein the seal retention member includes:
a base that overlaps the first major surface of the seal and includes a center that is aligned with a center of the seal,
a plurality of first arms that extend radially outward from the center and define a terminal end that is fixed to the bellows connection surface of the partition, and
a plurality of second arms that each define a free end that is constructed as an elastically deformable leaf spring that is engaged with the second major surface of the seal to retain the seal between the leading end and the base.

2. The accumulator according to claim 1 , wherein a fixing groove is formed in an inner peripheral surface of the bellows connection surface, and the terminal ends of the first arms are locked to the fixing groove.

3. The accumulator according to claim 1 , wherein each of the second arms extend radially outward from the center of the base.

4. The accumulator according to claim 3 , wherein each of the second arms includes a first section that extends along the first major surface of the seal, a second section orthogonally connected to the first section that extends along the side surface of the seal, and a third section connected to the second section that extends radially inward back toward the center of the base from the second section to overlap the second major surface of the seal and define the free end.

5. The accumulator according to claim 1 , wherein each of the second arms extend outward from the first arms.

6. The accumulator according to claim 5 , wherein each of the second arms include a first section attached to the first arm, and the first section attached to the first arm extends circumferentially about a perimeter of the seal.

7. The accumulator according to claim 6 , wherein each of the second arms includes a second section orthogonally connected to the first section that extends along the side surface of the seal, and a third section connected to the second section that extends radially inward back toward the center of the base from the second section to overlap the second major surface of the seal and define the free end.

Assignees

• Eagle Ind Co Ltd

Inventors

• Arikawa Tatsuhiro
• Yamashita Matsuyoshi

Classifications

• F15B2201/41

  Liquid ports · CPC title

• F15B2201/3153

  the flexible separating means being bellows · CPC title

• F15B20/007

  Overload · CPC title

• F15B1/106 Primary

  characterised by the way housing components are assembled · CPC title

• F15B1/103 Primary

  the separating means being bellows · CPC title