One-way valves
AssigneeQuantum Servo Pumping Technologies Pty Ltd
InventorsDarren Reukers, John Mark Reyes
Life of this patent
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Abstract
A one-way valve includes an upstream portion, a movable element, a downstream portion, a bias and flow paths. The upstream portion includes an inlet and a first engaging portion about the inlet. The movable element includes a second engaging portion (engageable with the first engaging portion to impede reverse flow), openings and first bias-contacting portions. The downstream portion includes an outlet and second bias-contacting portions. The bias acts between the first bias-contacting portions and the second bias-contacting portions to urge the movable element against the valve seat and surrounds an interior open to the outlet. The flow paths are via the openings and from outside of the first engaging portion and to the interior, and passing inboard of an upstream end of the bias.
Claims20
A one-way valve comprising:
- a housing;
- and
- within the housing a movable element, a bias and flow paths;
- wherein:
- the housing comprises an upstream portion, a downstream portion and one or more side portions;
- the upstream portion comprises
- an upstream inlet, and
- a first engaging portion about the upstream inlet;
- the movable element comprising
- a second engaging portion engageable with the first engaging portion to impede reverse flow, openings, and
- first bias-contacting portions;
- the downstream portion comprises
- a downstream outlet, and
- second bias-contacting portions;
- the bias
- is configured to act between the first bias-contacting portions and the second bias-contacting portions to urge the movable element against the first engaging portion, and surrounds an interior open to the downstream outlet;
- the flow paths
- are via the openings, and
- are from outside of the first engaging portion, and
- are to the interior, and
- pass inboard of an upstream end of the bias;
- and
- the movable element
- is movable in a stroke-wise direction;
- has an element length in the stroke-wise direction;
- has an element width transverse to the stroke-wise direction;
- the element length is not more than the element width;
- the first engaging portion and the second engaging portion are co-operable to define a sealing interface at which the movable element contacts the upstream portion;
- and
- a stroke-wise projection of the sealing interface has a cross-sectional area at least equal to a cross-sectional area of the upstream inlet.
A pump comprising;
- an inlet valve and an outlet valve;
- and
- a pumping chamber serviced by the inlet valve and the outlet valve;
- wherein at least one of the inlet valve and the outlet valve is a one-way valve comprising:
- an upstream portion comprising
- an upstream inlet, and
- a first engaging portion about the upstream inlet;
- a movable element comprising
- a second engaging portion engageable with the first engaging portion to impede reverse flow,
- openings, and
- first bias-contacting portions;
- a downstream portion comprising
- a downstream outlet, and
- second bias-contacting portions;
- a bias
- acting between the first bias-contacting portions and the second bias-contacting portions to urge the movable element against the first engaging portion, and surrounding an interior open to the downstream outlet;
- and
- flow paths
- via the openings, and
- from outside of the first engaging portion, and
- to the interior, and
- passing inboard of an upstream end of the bias, and
- wherein the pump is capable of delivering 345 MPa (50,000 psi).
A waterjet cutting apparatus comprising:
- a cutting head;
- and
- a pump to supply the cutting head;
- wherein the pump comprises an inlet valve, an outlet valve and a pumping chamber serviced by the inlet valve and the outlet valve;
- and
- at least one of the inlet valve and the outlet valve is a one-way valve comprising:
- an upstream portion comprising
- an upstream inlet, and
- a first engaging portion about the upstream inlet;
- a movable element comprising
- a second engaging portion engageable with the first engaging portion to impede reverse flow,
- openings, and
- first bias-contacting portions;
- a downstream portion comprising
- a downstream outlet, and
- second bias-contacting portions;
- a bias
- acting between the first bias-contacting portions and the second bias-contacting portions to urge the movable element against the first engaging portion, and surrounding an interior open to the downstream outlet;
- and
- flow paths
- via the openings, and
- from outside of the first engaging portion, and
- to the interior, and
- passing inboard of an upstream end of the bias.
Dependencies are inferred from the claim text.