# US 2019/0376602 A1 · Jet Valve

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- Number: US 2019/0376602 A1
- Document ID: US20190376602A1
- Status: Published application
- Kind: A1
- Application number: 16/438,432
- Filed: 2019-06-11
- Published: 2019-12-12
- Earliest claimed: 2018-06-12
- Assignees: Marco Systemanalyse und Entwicklung GmbH
- Applicants: Marco Systemanalyse und Entwicklung GmbH
- Inventors: Martin Reuter
- Web page: https://patentgrep.com/patent/US20190376602A1

## CPC

- F16K 1/14: with ball-shaped valve member (check valves F16K15/04)
- F16K 1/42: Valve seats (for double-seat valves F16K1/44)
- F16K 25/04: Arrangements for preventing erosion, not otherwise provided for
- B05B 1/302: {with a ball shaped valve member}
- F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)}
- B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D)

## Abstract

A jet valve has a medium passage that leads to a discharge opening and that is closable by a sealing element that can be set against a seal seat. The seal seat has a sealing surface in the form of an annular strip. The jet valve has a high service life and is suitable for metering very small quantities.

## Claims

### Claim 1

A jet valve having a medium passage that leads to a discharge opening, and that is closable by a spherical sealing element, the spherical sealing element being able to be set against a seal seat, wherein the seal seat has a sealing surface in the form of a spherically curved annular strip and the seal seat has a spherical surface contour subsequent to the sealing surface and spaced apart from the sealing element and that forms a gap with the sealing element when the latter abuts against the sealing surface.

### Claim 2 (depends on 1)

The jet valve in accordance with claim 1, wherein a step is provided between the surface contour and the sealing surface.

### Claim 3 (depends on 1)

The jet valve in accordance with claim 1, wherein the surface contour extends in parallel with the sealing element in the region of the gap.

### Claim 4 (depends on 1)

The jet valve in accordance with claim 1, wherein the width of the gap is no larger than the width of the annular strip.

### Claim 5 (depends on 4)

The jet valve in accordance with claim 4, wherein the width of the annular strip amounts to 25-55 μm.

### Claim 6 (depends on 5)

The jet valve in accordance with claim 5, wherein the width of the annular strip amounts to 30-50 μm.

### Claim 7 (depends on 4)

The jet valve in accordance with claim 4, wherein the width of the gap amounts to 1-30 μm.

### Claim 8 (depends on 7)

The jet valve in accordance with claim 7, wherein the width of the gap amounts to 5-25 μm.

### Claim 9 (depends on 1)

The jet valve in accordance with claim 1, wherein an aperture is provided at the center of the gap that leads to the discharge opening, that initially tapers conically, starting from the gap, and that is subsequently formed as a hollow cylindrical discharge passage up to the discharge opening.

### Claim 10 (depends on 9)

The jet valve in accordance with claim 9, wherein the hollow cylindrical discharge passage of the aperture has a diameter of 40-50 μm.

### Claim 11 (depends on 9)

The jet valve in accordance with claim 9, wherein the hollow cylindrical discharge passage of the aperture has a length of 100-300 μm.

### Claim 12 (depends on 1)

The jet valve in accordance with claim 1, wherein the discharge opening is configured as an orifice of a hollow cylindrical discharge passage, with the angle between the wall of the discharge passage and the surface surrounding the discharge opening being an acute angle, viewed in cross-section.

### Claim 13 (depends on 12)

The jet valve in accordance with claim 12, wherein the angle between the wall of the discharge passage and the surface surrounding the discharge opening amounts to less than 60°

### Claim 14 (depends on 13)

The jet valve in accordance with claim 13,
wherein the angle between the wall of the discharge passage and the surface surrounding the discharge opening amounts to 45° or less.

### Claim 15 (depends on 1)

The jet valve in accordance with claim 1, wherein the width of the gap between the sealing surface and an aperture leading to the discharge opening is reduced stepwise to a reduced width.

### Claim 16 (depends on 15)

The jet valve in accordance with claim 15, wherein the width of the gap between the sealing surface and an aperture leading to the discharge opening is reduced stepwise to a reduced width of approximately 10-15 μm.

### Claim 17 (depends on 15)

The jet valve in accordance with claim 15, wherein the reduction of the gap width takes place by an annular web that is arranged around the aperture.