US4890815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve with membrane spring
Assignee: Robert Bosch GmbH
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Filing: 1985-08-23
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Granted: 1990-01-02
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Expires: 2005-08-23
Abstract
Abstract A magnetic valve has a coil, an armature, and a permanent magnet arranged coaxially with the coil, wherein the permanent magnet is formed as a plate with magnetic lines of force extending in the same direction or oppositely to the magnetic lines of force of the coil, and the armature is formed as a valve body opening in direction toward a lower pressure.
Inventors
- 👤 Asta Hascher-Reichl
- 👤 Hans Kubach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:57
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/08; F16K31/082; F02; F02M; F02M51/00; F02M51/06; F02M51/061; F02M51/0625; F02M51/0664; F02M51/0671; F02M51/0689; F02M51/08; F02M59/00; F02M59/44; F02M59/46; F02M59/466; F02B; F02B1/00; F02B1/02; F02B1/04; F02B3/00; F02B3/06; H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F2007/1676
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
175 words
A magnetic valve for controlling a flow of liquid, comprising a coil having an axis; an armature; a permanent magnet arranged coaxially with said coil and so that its poles are spaced from one another in an axial direction of said coil, said permanent magnet being formed as a plate, and said armature being formed as a valve body opening in a flow direction so that its opening force is provided by the liquid flow and its closing force is provided by a force of said permanent magnet; a disc-shaped membrane spring, said membrane spring having a central opening in which said valve body is supported, and also having an inner side mounted on said valve body, so that said valve body is supported only by said membrane spring, and said membrane spring does not apply any opening or closing force to said valve body; and a housing having a wall and arranged so that an intermediate space for controlling the magnetix flux is formed between said permanent magnet and said wall of said housing.
Claim 2
Dependent Claim
175 words
A magnetic valve for controlling a flow of liquid, comprising a coil having an axis; an armature; a permanent magnet arranged coaxially with said coil and so that its poles are spaced from one another in an axial direction of said coil, said permanent magnet being formed as a plate, and said armature being formed as a valve body opening in a flow direction so that its opening force is provided by the liquid flow and its closing force is provided by a force of said permanent magnet; a disc-shaped membrane spring, said membrane spring having a central opening in which said valve body is supported, and also having an inner side mounted on said valve body, so that said valve body is supported only by said membrane spring, and said membrane spring does not apply any opening or closing force to said valve body; and a housing having a wall and arranged so that an intermediate space for controlling the magnetix flux is formed between said permanent magnet and said wall of said housing.
Claim 3
Dependent Claim
54 words
A magnetic valve as defined in claim 1, wherein said coil has magnetic lines of force extending in a predetermined direction, said permanent magnet being arranged so that its magnetic lines of force extend in a direction which is opposite to the direction of extension of the magnetic lines of force of said coil.
Claim 4
Dependent Claim
48 words
A magnetic valve as defined in claim 1, wherein said coil has magnetic lines of force extending in a predetermined direction, said permanent magnet being arranged so that its magnetic lines of force extend in the direction in which the magnetic lines of force of said coil extend.
Claim 5
Dependent Claim
47 words
A magnetic valve as defined in claim 1; and further comprising a housing having a wall, a coil former, and a small web provided between said coil former and said permanent magnet and forming a magnetic leakage gap between said web and said wall of said housing.
Claim 6
Dependent Claim
49 words
A magnetic valve as defined in claim 1; and further comprising a housing having an outer side, said permanent magnet being arranged in said housing at a predetermined height, said housing having a depression extending around said housing at its outer side at the height of said permanent magnet.
Claim 7
Dependent Claim
17 words
A magnetic valve as defined in claim 1; and further comprising a housing formed of soft iron.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-01 | 1993-07-03 | 1994-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-01 | 1997-07-03 | 1998-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-01 | 2001-07-03 | 2002-01-02 | $7700.00 | Window Closed / Lapsed |