Check valve with secondary backflow seal
AssigneeCareFusion 303, Inc.
InventorsShervin MALEKI, Eugene Mason, Raymond P. Feith
Life of this patent
Estimating the term…
Abstract
Check valve are disclosed having a primary seal and a secondary seal, where the primary and secondary seals resist movement of a fluid through the check valve, and the secondary seal can provide a backup seal in an instance where the check valve does not function as intended. The primary and secondary seals can be formed by first and second sealing ridges, respectively, and a valve body can be positioned within the check valve, between a valve support, the first sealing ridge, and a second sealing ridge. The valve body is configured to move relative to the first and second sealing ridges, and can have a position wherein a portion of the valve body is engaged against any of the first and second sealing ridges.
Claims20
A check valve comprising:
- a housing comprising an inner cavity, a first port, a second port, a first sealing ridge, a second sealing ridge, and a valve support, wherein an upstream fluid passageway extends through the first port to the inner cavity, a downstream fluid passageway extends through the second port to the inner cavity, the first sealing ridge extends into the cavity and comprises a perimeter that extends around the first port, and the second sealing ridge extends into the cavity and comprises a perimeter that extends around the first sealing ridge such that the first seal ridge is between the first port and the second seal ridge;
- and
- a flexible valve body positioned within the inner cavity, the valve body comprising a first segment and a second segment, wherein the first segment is engaged against the valve support, and the second segment is movable, relative to the first segment and the first and second sealing ridges.
A check valve comprising:
- a housing comprising an inner cavity, a first port, a second port, a first sealing ridge, a second sealing ridge, and a valve support, wherein an upstream fluid passageway extends through the first port to the inner cavity, a downstream fluid passageway extends through the second port to the inner cavity, the first sealing ridge extends into the cavity and comprises a perimeter that extends around the first port, and the second sealing ridge extends into the cavity and comprises a perimeter that extends around the first sealing ridge such that the first seal ridge is between the first port and the second seal ridge;
- and
- a flexible valve body positioned within the inner cavity and comprising a first segment and a second segment, wherein the second segment defines a perimeter that is positioned radially outward from the first segment, and wherein, in a first closed position of the valve body, the second segment is engaged against the first sealing ridge, and in an open position of the valve body, the entire perimeter of the second segment is spaced apart from the first and second sealing ridges .
Dependencies are inferred from the claim text.