Accumulator
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United States of America Patent
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-
Jul 12, 2016
Grant Date -
Aug 27, 2015
app pub date -
Feb 20, 2015
filing date -
Feb 24, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An accumulator includes a bellows housed to freely expand and contract in a shell, a port part having a pressure fluid inflow port formed therein, and a self-sealing member arranged on a tip portion of the bellows to face the port part, in which when a pressure in the fluid chamber is lower than a predetermined pressure relative to an air chamber, the self-sealing member is allowed to abut onto a seal area of the port part to block the pressure fluid inflow port. The self-sealing member includes a resilient member arranged on a surface of a base material part, and an overhanging portion formed on the resilient member and allowed to abut onto the seal area for sealing. The port part includes a seal face having the seal area formed thereon, and a projecting portion arranged on a region other than the seal area on the seal face.
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