Valve device for switching or metering a fluid

Patent metadata

Field	Value
Publication number	US-9765898-B2
Application number	US-201214005133-A
Country	US
Kind code	B2
Filing date	Jan 9, 2012
Priority date	Mar 14, 2011
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

A valve device for switching or metering a fluid includes a housing, a flow channel defined by the housing, and a valve body arranged in the flow channel. The valve body has a sealing section which contacts a housing-side sealing seat when the valve device is closed. The sealing section at least slightly protrudes beyond a surface of the valve body facing the sealing seat.

First claim

The invention claimed is:

1. A valve device for switching or metering a fluid, comprising:
a housing defining a flow duct; and
a valve body arranged in the flow duct and including a sealing portion, the sealing portion configured so that the entire sealing portion is positioned against a sealing seat on the housing when the valve device is closed; and
a fluidically active shield located in the flow duct and configured to at least partially shield the valve body from a flow of the fluid in the event of a return flow of the fluid when the valve body is forcibly raised from the sealing seat, the shield defining a protected space configured to surround completely the valve body when the valve body is forcibly raised from the sealing seat,
wherein the sealing portion projects at least slightly beyond a surface of the valve body that faces toward the sealing seat,
wherein the sealing portion is located outside of the protected space when the sealing portion is positioned against the sealing seat, and
wherein the valve body is movable relative to the fluidically active shield.

2. The valve device as claimed in claim 1 , wherein the valve body and the sealing portion are produced in one piece.

3. The valve device as claimed in claim 1 , wherein the functional elements of the valve device are of substantially rotationally symmetrical form and the sealing portion is part of a radially encircling annular web.

4. The valve device as claimed in claim 1 , wherein a delimiting wall of the flow duct is located inboard of the sealing region and defines a rounding or a bevel.

5. The valve device as claimed in claim 1 , wherein the sealing portion is configured as an annulus shaped surface completely positionable against the sealing seat.

6. A valve device for switching or metering a fluid, comprising:
a housing defining a flow duct; and
a valve body arranged in the flow duct and including a sealing portion, the sealing portion configured so that the entire sealing portion is positioned against a sealing seat on the housing when the valve device is closed; and
a fluidically active shield located in the flow duct and configured to at least partially shield the valve body from a flow of the fluid in the event of a return flow of the fluid when the valve body is forcibly raised from the sealing seat, the shield defining a protected space configured to surround completely the valve body when the valve body is forcibly raised from the sealing seat,
wherein the sealing portion projects at least slightly beyond a surface of the valve body that faces toward the sealing seat,
wherein the valve body is movable relative to the fluidically active shield, and
wherein the sealing seat is of substantially planar form in an area surrounding a sealing region.

7. The valve device as claimed in claim 6 , wherein the valve body and the sealing portion are produced in one piece.

8. The valve device as claimed in claim 6 , wherein the functional elements of the valve device are of substantially rotationally symmetrical form and the sealing portion is part of a radially encircling annular web.

9. The valve device as claimed in claim 6 , wherein a delimiting wall of the flow duct is located inboard of the sealing region and defines a rounding or a bevel.

10. The valve device as claimed in claim 6 , wherein the sealing portion is configured as an annulus shaped surface completely positionable against the sealing seat.

11. A valve device for switching or metering a fluid, comprising:
a housing defining a flow duct; and
a valve body arranged in the flow duct and including a sealing portion, the sealing portion configured so that the entire sealing portion is positioned against a sealing seat on the housing when the valve device is closed; and
a fluidically active shield located in the flow duct and configured to at least partially shield the valve body from a flow of the fluid in the event of a return flow of the fluid when the valve body is forcibly raised from the sealing seat, the shield defining a protected space configured to surround completely the valve body when the valve body is forcibly raised from the sealing seat,
wherein the sealing portion projects at least slightly beyond a surface of the valve body that faces toward the sealing seat,
wherein the valve body is movable relative to the fluidically active shield, and
wherein the valve body has an axial and approximately spherical-cap-shaped recess against which a valve needle is configured to abut.

12. The valve device as claimed in claim 11 , wherein the valve body and the sealing portion are produced in one piece.

13. The valve device as claimed in claim 11 , wherein the sealing seat is of substantially planar form in an area surrounding a sealing region.

14. The valve device as claimed in claim 11 , wherein the functional elements of the valve device are of substantially rotationally symmetrical form and the sealing portion is part of a radially encircling annular web.

15. The valve device as claimed in claim 11 , wherein a delimiting wall of the flow duct is located inboard of the sealing region and defines a rounding or a bevel.

16. The valve device as claimed in claim 11 , wherein the sealing portion is configured as an annulus shaped surface completely positionable against the sealing seat.

Assignees

• Deponte Rene
• Gerundt Oliver
• Eichendorf Andreas
• Haller Juergen
• Brunner Dominik
• Bosch Gmbh Robert

Inventors

• Deponte Rene
• Gerundt Oliver
• Eichendorf Andreas
• Haller Juergen
• Brunner Dominik

Classifications

• F02M63/0077

  Valve seat details · CPC title

• F16K25/00 Primary

  Details relating to contact between valve members and seats (movement of valve members other than for opening and closing F16K29/00) · CPC title

• F02M63/0026

  using piezoelectric or magnetostrictive actuators · CPC title

• F02M59/44

  Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; {Pumps having transducers, e.g. to measure displacement of pump rack or piston} · CPC title

• F02M59/366 Primary

  Valves being actuated electrically · CPC title