公开(公告)号：US20030116209A1

公开(公告)日：2003-06-26

申请号：US10308717

申请日：2002-12-03

Applicant: NHK Spring Co., Ltd.

Inventor： Chiharu Umetsu ,  Hiroshi Mizukami ,  Koichiro Yamada

IPC: F16L055/04

CPC classification number: F16L55/053 ,  F15B1/103 ,  F15B2201/205 ,  F15B2201/3153 ,  F15B2201/411 ,  F15B2201/4155 ,  F16L55/043 ,  Y10T137/1632 ,  Y10T137/8811

Abstract: In an accumulator comprising a pressure vessel, a bellows dividing the interior of the pressure vessel into a gas chamber filled with pressurized gas and a liquid chamber which communicates with a liquid pressure circuit via a liquid introduction port, a stay member attached to the inner surface of the pressure vessel inside the bellows and provided with a communication port for communicating the interior and exterior of the stay member with each other and adapted to be closed by a part of the bellows to define a fully contracted state of the bellows, and a safety valve provided in the stay member, typically in the form of a weakened portion of the stay member, for selectively communicating the exterior of the stay member with the interior of the stay member. Thus, because the safety valve is not provided in the pressure vessel itself, the safety valve of the present invention would not affect the sealing capability of the pressure vessel.

Abstract translation: 在包括压力容器的蓄能器中，将压力容器的内部分隔成充满加压气体的气室和通过液体引入口与液压回路连通的液体室的波纹管，附接到内表面的止动构件 的波纹管内的压力容器，并且设置有用于将支撑构件的内部和外部彼此连通并且适于由波纹管的一部分封闭的连通口，以限定波纹管的完全收缩状态，以及安全 提供在支撑构件中的阀通常为止动构件的弱化部分的形式，用于选择性地将撑杆构件的外部与撑杆构件的内部连通。 因此，由于安全阀不设置在压力容器本身中，所以本发明的安全阀不会影响压力容器的密封能力。

公开(公告)号：US20010037834A1

公开(公告)日：2001-11-08

申请号：US09902565

申请日：2001-07-12

Applicant: NHK SPRING CO., LTD

Inventor： Takeyoshi Shimbori ,  Chiharu Umetsu ,  Kouji Nakamura ,  Hiroshi Mizukami ,  Naoki Ueno

IPC: F16L055/04 ,  B21D051/16

CPC classification number: B23K11/002 ,  B23K11/14 ,  F15B1/103 ,  F15B1/22 ,  F15B2201/205 ,  F15B2201/312 ,  F15B2201/3151 ,  F15B2201/3153 ,  F15B2201/3158 ,  F15B2201/411 ,  F15B2201/415 ,  F15B2201/60 ,  Y10T29/49394 ,  Y10T29/49877 ,  Y10T29/49893

Abstract: Disclosed is an accumulator comprising: a pressure vessel; an elastic bellows in which a compressed gas is sealed, an end of the bellows being fixed to an interior of the pressure vessel; a flow path having an opening communicating with the interior and an exterior of the pressure vessel; a valve connected to a movable end of the bellows to operatively close the opening according to elastic motion of the bellows; and a hydraulic chamber partitioned from a gas chamber formed in an interior of the bellows containing the compressed gas. The valve comprises an upper surface which can cover the opening, and plural circular protrusions which surround the entire circumference of the opening and can closely contact the circumference of the opening.