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US 2003/0205276 A1Published application
Modular two way check valve construction
AssigneeMykrolis Corporation
InventorIraj Gashgaee
Life of this patent
Estimating the term…
Abstract
A check valve construction is provided which includes a housing having a first flow path and a second flow path. Liquid flow is controlled within the first and second flow path by movable plungers (22, 24) having a sealing surface and a plurality of prongs that control the length of movement of the plunger within the housing. One of the plungers permits liquid flow while the other of the plungers prevents liquid flow in response to pressure change within the flow paths.
Claims8
A check valve construction which comprises:
- a first housing including a first liquid flow path through said first housing between a first opening and a second opening and a second liquid flow path between a third opening of said first housing and said first liquid flow path,
- a first movable plunger positioned within said first flow path between said first housing and a first connector,
- said first movable plunger having a first sealing surface, at least two prongs attached to a surface opposite said first sealing surface and a plurality of concave surfaces positioned about a periphery of said first sealing surface,
- a second movable spring loaded plunger positioned within said second liquid flow path,
- said second movable spring loaded plunger having a second sealing surface, at least two prongs attached to a surface opposite said second sealing surface and a plurality of concave surfaces positioned about a periphery of said second sealing surface,
- said first liquid flow path and said second liquid flow path in fluid communication with means for changing pressure within said flow paths.
3 more elements
A check valve construction which comprises:
- a first housing including a first liquid flow path through said first housing between a first opening and a second opening and a second liquid flow path between a third opening of said first housing and said first liquid flow path,
- a first movable plunger positioned within said first flow path between said first housing and a first connector,
- said first movable plunger having a first sealing surface, at least two prongs attached to a surface opposite said first sealing surface and a plurality of concave surfaces positioned about a periphery of said first sealing surface,
- a second movable plunger positioned within said second flow path between said first housing and a second connector,
- said second movable plunger having a second sealing surface, at least two prongs attached to a surface opposite said second sealing surface and a plurality of concave surfaces positioned about a periphery of said second sealing surface,
- said first liquid flow path and said second liquid flow path in fluid communication with means for changing pressure within said flow paths.
3 more elements
Dependencies are inferred from the claim text.