Accumulator
AssigneeEagle Industry Co., Ltd.
InventorTatsuhiro ARIKAWA
Life of this patent
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Abstract
An accumulator includes a housing having a sealing face and a fluid inlet/outlet passage, a bellows fixed at least one end to the housing such that an inner space of the housing is hermetically partitioned by the bellows into an interior and an exterior of the bellows, the bellows including a bellows main body capable of expanding and contracting and a bellows cap including an annular seal holder, and a sealing member formed by covering a disc-shaped substrate with an elastic body that is opposed to and capable of being closely attached to the sealing face of the housing, the sealing member is held by a holding portion of the annular seal holder on an inner diameter side of the annular seal holder, the fluid inlet/outlet passage of the housing being closed upon a close attachment of the elastic body to the sealing face.
Claims20
1:
- An accumulator comprising:
- a housing having a scaling face and a fluid inlet/outlet passage;
- a bellows fixed at least one end to the housing such that an inner space of the housing is hermetically partitioned by the bellows into an interior and an exterior of the bellows, the bellows including a bellows main body capable of expanding and contracting and a bellows cap including an annular seal holder;
- and
- a sealing member formed by covering a disc-shaped substrate with an elastic body that is opposed to and capable of being closely attached to the sealing face of the housing, the sealing member is held by a holding portion of the annular seal holder on an inner diameter side of the annular seal holder, the fluid inlet/outlet passage of the housing being closed upon a close attachment of the elastic body to the scaling face,
- wherein
- a through hole passing through in a radial direction is provided in the seal holder, and a communication passage extending in the radial direction so as to partially form a space providing communication between the through hole and the fluid inlet/outlet passage is provided in the seal holder or the sealing face.
2:
- The accumulator according to claim 1, wherein
- a plurality of the through holes and a plurality of the communication passages are provided in the circumferential direction.
The accumulator according to claim 1, wherein
- the through hole and the communication passage are aligned in the radial direction.
The accumulator according to claim 1, wherein the substrate has a diameter larger than an inner diameter of the holding portion of the seal holder, and
- the communication passage is a communication recess portion provided on an upper face of the holding portion of the seal holder and, extending more than the substrate outward in the radial direction.
The accumulator according to claim 1, wherein the substrate has a diameter smaller than an inner diameter of the holding portion of the seal holder, and
- the communication passage is a communication recess portion provided on the sealing face.
The accumulator according to claim 1, wherein
- the seal holder is formed in an upward substantially-U shape in a sectional view, and having a standing portion on the radially inward side of the substantially-U shape that holds the sealing member,
- the substrate has a diameter larger than an inner diameter of the standing portion of the seal older, and
- the communication passage is a communication hole passing through the standing portion of the seal holder in the radial direction.
The accumulator according to claim 1, wherein
- the fluid inlet/outlet passage has an opening portion formed in a funnel shape gradually spreading toward an open end thereof.
The accumulator according to claim 2, wherein
- the through hole and the communication passage are aligned in the radial direction.
The accumulator according to claim 2, wherein the substrate has a diameter larger than an inner diameter of the holding portion of the seal holder, and
- the communication passage is a communication recess portion provided on an upper face of the holding portion of the seal holder and, extending more than the substrate outward in the radial direction.
The accumulator according to claim 2, wherein the substrate has a diameter smaller than an inner diameter of the holding portion of the seal holder, and
- the communication passage is a communication recess portion provided on the sealing face.
The accumulator according to claim 2, wherein
- the seal holder is formed in an upward substantially-U shape in a sectional view, and having a standing portion on the radially inward side of the substantially-U shape that holds the sealing member,
- the substrate has a diameter larger than an inner diameter of the standing portion of the seal holder, and
- the communication passage is a communication hole passing through the standing portion of the seal holder in the radial direction.
The accumulator according to claim 2, wherein
- the fluid inlet/outlet passage has an opening portion formed in a funnel shape gradually spreading toward an open end thereof.
Dependencies are inferred from the claim text.