Check valve
AssigneeHewlett-Packard Development Company, L.P.
InventorsDavid Onstenk, Erik E. Erlandson
Life of this patent
Estimating the term…
Abstract
In one embodiment, a check valve includes an outer region and a central region. One or more cuts wind from the outer region towards the central region. In the presence of flow along one direction, the check valve opens by extending the central region away from the outer region. In the presence of flow in the reverse direction, the check valve closes by retracting the central region towards the outer region.
Claims21
A check valve comprising:
- an outer region;
- a central region;
- a cut winding from the outer region towards the central region;
- and
- wherein the check valve opens by extending the central region away from the outer region in the presence of flow along one direction and closes by retracting the central region towards the outer region in the presence of flow in the reverse direction.
A method of preventing reverse air flow through a fan, the method comprising:
- expanding a check valve towards a center of a working blower to allow airflow through the check valve;
- and
- when the fan fails, collapsing the check valve to limit airflow through the check valve.
A check valve comprising:
- means for expanding a check valve towards the center of a blower to allow airflow in one direction;
- and
- means for collapsing the check valve to limit airflow in the reverse direction.
A blower arrangement comprising:
- a blower;
- a check valve attached on the intake side of the blower, the check valve having a hole that slides on a shaft;
- and
- a grate attached over the check valve.
A cooling mechanism comprising:
- a plurality of cooling components, each cooling component in the plurality of cooling components having a check valve that includes a cut winding from an outer region towards a central region;
- and wherein the check valve in each cooling component opens by extending the central region away from the outer region in the presence of flow along one direction and closes by retracting the central region towards the outer region in the presence of flow in the reverse direction.
Dependencies are inferred from the claim text.