Metal bellows hydraulic accumulator

Details Metal bellows hydraulic accumulator Metal bellows hydraulic accumulator

2006-03-21

2006-03-21

Lazo, Thomas E. (Department: 3745)

Pipes and tubular conduits

With pressure compensators

Variable capacity chambers

C060S413000

Reexamination Certificate

active

07013923

ABSTRACT:
A metal bellows hydraulic accumulator includes a bellows unit having a metal bellows portion and disposed within a pressure space of a pressure vessel, whereby the pressure space is sectioned into a gas chamber and a liquid chamber communicating with a liquid passage. The liquid chamber is sectioned into a first liquid chamber to which the bellows portion of the bellows unit is exposed, and a second liquid chamber to which the liquid passage is opened. An open-close valve is provided so as to establish and break communication between the first and second liquid chambers. A filter for separating foreign matter contained in operating liquid flowing toward the liquid passage, and a foreign-matter storing section capable of storing the foreign matter are provided in the second liquid chamber.

REFERENCES:
patent: 3456673 (1969-07-01), Legrand
patent: 4995485 (1991-02-01), Nakamura et al.
patent: 6871672 (2005-03-01), Kurokawa et al.
patent: 2001124001 (2001-05-01), None
patent: 2002-155901 (2002-05-01), None

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