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 extending between the first segment and an outer perimeter of the flexible valve body, wherein the first segment is engaged against the valve support, the second segment is movable, relative to the first segment, and the second segment comprises a first portion and a second portion, and wherein the first portion is movable relative to the perimeter of the first sealing ridge, and the second portion is moveable relative to the perimeter of the second sealing ridge and the first portion.
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 is positioned radially outward from the first segment and extends from the first segment to an outer perimeter of the flexible valve body, and, in a first closed position of the valve body, a first portion of the second segment is engaged against the first sealing ridge, in an open position of the valve body, the first portion and a second portion of the second segment are spaced apart from the first and second sealing ridges, and in the first closed position and the open position of the valve body, the second portion is moveable relative to the first portion.
Dependencies are inferred from the claim text.