Patent ID: 9435450
Filing Date: 2016-09-06
CPC Classification: A61M,F16K,Y10T

Claim Text:
1. A pressure differential relief valve for a medical fluid reservoir, the valve comprising: a valve body having a structure configured to mate with the medical fluid reservoir, the valve body including a first end portion and a second end portion, the valve body defining an open interior bore space within the valve body, the valve body defining first and second gas passageways that are configured to allow a first exterior region that is outside of the valve body and proximate to the first end portion to be in fluid communication through the valve body with a second exterior region that is outside of the valve body and proximate to the second end portion; a resilient member that is at least partially disposed within the open interior bore space; and a movable element that is at least partially disposed within the open interior bore space, the movable element being movable within the open interior bore space at least between (i) a first end position that is closer to the first end portion than to the second end portion, (ii) a second end position that is closer to the second end portion than to the first end portion, and (iii) an intermediate position that is between the first and second end positions, wherein, when the movable element is in the intermediate position, the movable element substantially prevents fluid communication through the valve body between the first exterior region and the second exterior region, wherein when the movable element is in the first end position the first exterior region and the second exterior region are in fluid flow communication through at least the first gas passageway, wherein when the movable element is in the second end position the first exterior region and the second exterior region are in fluid flow communication through at least the second gas passageway, and wherein when the movable element is in the second end position the movable element has deflected the resilient member, the valve body having an overall longitudinal length that extends directionally between the first and second end portions, the first gas passageway having a first longitudinal length that extends directionally between the first and second end portions, the second gas passageway having a second longitudinal length that extends directionally between the first and second end portions, wherein the first longitudinal length is less than the overall longitudinal length, wherein the second longitudinal length is less than the overall longitudinal length, and wherein a sum of the first longitudinal length and the second longitudinal length is greater than the overall longitudinal length.