Patent ID: 9377031
Filing Date: 2016-06-28
CPC Classification: F15B

Claim Text:
1. An accumulator comprising: an accumulator housing which is provided with an oil port connected to a pressure piping of equipment; an inner portion of the accumulator housing being sectioned into a gas chamber filling with gas and a fluid chamber communicating with said oil port by a bellows and a bellows cap; said bellows cap sealing said fluid chamber by coming into contact with a seal on the basis of movement in a stroke in the case that a pressure of said pressure piping is decreased; and said seal being retained by a seal retaining portion which is provided on an inner peripheral side of the seal, wherein said seal has only one lip end, and only said one lip end comes in contact with said bellows cap, and wherein a seal diameter of said one lip end is set to be equal to or larger than an effective diameter of said bellows at a position where said one lip end comes into contact with said bellows cap.