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US 4,304,257 AGranted
Valve with flexible sheet member
AssigneeInstrumentation Laboratory Company
InventorMilo E. Webster
Life of this patent
Estimating the term…
Abstract
A valve that is particularly useful in biological fluid handling systems includes a body member that has a firm and stable support surface and a flexible sheet member that has a surface for conforming and mating engagement with the surface of the valve body member. A land portion in the surface of one of the valve members separates two fluid flow channels in that member. An actuator is arranged to flex the sheet member between a first position in which the surface of the sheet member is in mating and sealing engagement with the surface of the body member to sealing block flow between the two channels, and a second position in which the sheet surface is spaced from the first position to allow fluid flow across the land surface between the two flow channels.
Claims33
A valve comprising
- a valve body member having a firm and stable surface,
- a flexible valve sheet member having a surface for conforming and mating engagement with said valve body surface,
- backing plate structure,
- biasing means for resiliently clamping said sheet member between said body member and said backing plate structure,
- first and second channel portions in one of said members with a land portion between said channel portions, the surface of said land portion being coincident with the surface of the member in which it is located,
- and an actuator for flexing said sheet member between a first position in which said valve sheet surface is in mating and sealing engagement with said valve body surface to sealingly block flow between said first and second channel portions, and a second position in which said sheet surface is spaced away from said first position to allow flow between said first and second channel portions across said land portion.
3 more elements
A valve comprising
- a valve body member having a firm and stable surface,
- a flexible valve sheet member having a surface for conforming and mating engagement with said valve body surface,
- first and second grooves extending along the surface of one of said members with a land portion located between the ends of said two grooves, the surface of said land portion being coincident with the surface of the member in which it is located,
- and an actuator for flexing said sheet member between a first position in which said valve sheet surface is in mating and sealing engagement with said valve body surface to sealingly block flow between said first and second grooves, and a second position in which said sheet surface is spaced away from said first position to allow flow between said first and second grooves across said land portion.
1 more element
A valve comprising
- a valve body member having a firm and stable surface,
- a flexible valve sheet member having a surface for conforming and mating engagement with said valve body surface,
- first and second channel portions in one of said members with a land portion between said channel portions, the surface of said land portion being coincident with the surface of the member in which it is located, one of said channel portions being a flow through groove that extends along the surface of the member in which said land portion is located, and said land portion being located between said groove and an adjacent channel portion
- and an actuator for flexing said sheet member between a first position in which said valve sheet surface is in mating and sealing engagement with said valve body surface to sealingly block flow between said flow through groove and said adjacent channel portion, and a second position in which said sheet surface is spaced away from said first position to allow flow between said flow through groove and said adjacent channel portion across said land portion.
1 more element
A valve comprising
- a valve body member of transparent biologically inert material having a firm and stable planar surface,
- a flexible valve sheet member of biologically inert material having a planar surface for conforming and mating engagement with said valve body surface, backing plate structure, biasing means for resiliently clamping said sheet member between said body member and said backing plate structure,
- first and second channel portions in one of said members with a land portion between said channel portions, the surface of said land portion being coincident with the surface of the member in which it is located,
- and an actuator including a portion embedded in said sheet member for flexing said sheet member between a first position in which said valve sheet surface is in mating and sealing engagement with said valve body surface to sealingly block flow between said first and second channel portions, and a second position in which said sheet surface is spaced away from said first position to allow flow between said first and second channel positions across said land portion.
1 more element
A valve array comprising a face plate body member having a firm and stable surface,
- a flexible valve sheet member having a surface for conforming and mating engagement with said valve face plate surface,
- backing plate structure,
- biasing means for resiliently clamping said sheet member between said body member and said backing plate structure,
- a network of channel portions in one of said members with a plurality of valve land portions, each said valve land portion being located between two adjacent ones of said channel portions, the surfaces of said land portions being coincident with the surface of the member in which they are located,
- and a plurality of actuators, each said actuator being arranged to flex said sheet member between a first position in which said valve sheet surface is in mating and sealing engagement with said valve face plate surface to sealingly block flow between adjacent ones of said channel portions, and a second position in which said sheet surface is spaced away from said first position to allow flow between said adjacent channel portions across the land portion corresponding to that actuator.
2 more elements
Dependencies are inferred from the claim text.