US4506701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solenoid-operated valve for selecting one of two pressure sources
Assignee: Denso Corp
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Filing: 1983-05-11
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Granted: 1985-03-26
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Expires: 2003-05-11
Abstract
Abstract A solenoid-operated valve for selecting one of two pressure sources has a stationary core which comprises a cylindrical magnetic body which is energized by an excitation current of selected direction and which is housed in a cylindrical valve housing. First and second magnet chambers communicating with first and second pressure sources at two ends of the stationary core are defined in the portions of the housing which oppose first and second pole faces. First and second permanent magnets which are magnetized to the poles opposite to those of the first and second pole faces are respectively housed in the first and second magnet chambers. A first valve member is formed integrally with the first permanent magnet and closes a vent hole communicating with the first pressure source when the first permanent magnet is repelled from the first pole face. A second valve member is formed integrally with the second permanent magnet and closes a vent hole formed in the stationary core when second permanent magnet is attracted to the second pole face.
Inventors
- 👤 Kazuo Masaki
- 👤 Ryohei Hiramatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:00
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/08; F16K31/082; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87169; Y10T137/87217; Y10T137/877; Y10T137/87708; Y10T137/87772
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
231 words
A solenoid-operated valve for selecting one of two pressure sources, comprising: a stationary core which is made of a magnetic material and which has first and second pole faces to be magnetized to first and second poles which are opposite to each other; excitation coil means for exciting the stationary core to one of the first and second poles; vent hole means for communicating between said first and second pole faces of said stationary core; first and second permanent magnets which are respectively arranged to oppose said first and second pole faces of said stationary core, surfaces of which permanent magnets are magnetized to the opposite poles; first and second magnet chambers which communicate with first and second pressure sources, respectively, and which house said first and second permanent magnets therein such that said first and second permanent magnets may be attracted to or repelled from said stationary core; a first valve member which is formed integrally with said first permanent magnet and which closes a vent hole communicating with said first pressure source when repelled from said first pole face of said stationary core; a second valve member which is formed integrally with said second permanent magnet and which closes said vent hole means of said stationary core when attracted to said second pole face of said stationary core; and an output vent hole formed in said first magnet chamber.
Claim 2
Dependent Claim
231 words
A solenoid-operated valve for selecting one of two pressure sources, comprising: a stationary core which is made of a magnetic material and which has first and second pole faces to be magnetized to first and second poles which are opposite to each other; excitation coil means for exciting the stationary core to one of the first and second poles; vent hole means for communicating between said first and second pole faces of said stationary core; first and second permanent magnets which are respectively arranged to oppose said first and second pole faces of said stationary core, surfaces of which permanent magnets are magnetized to the opposite poles; first and second magnet chambers which communicate with first and second pressure sources, respectively, and which house said first and second permanent magnets therein such that said first and second permanent magnets may be attracted to or repelled from said stationary core; a first valve member which is formed integrally with said first permanent magnet and which closes a vent hole communicating with said first pressure source when repelled from said first pole face of said stationary core; a second valve member which is formed integrally with said second permanent magnet and which closes said vent hole means of said stationary core when attracted to said second pole face of said stationary core; and an output vent hole formed in said first magnet chamber.
Claim 3
Dependent Claim
29 words
A valve according to claim 1, wherein said stationary core is columnar in shape, and ends thereof along an axial direction thereof define said first and second pole faces.
Claim 4
Dependent Claim
51 words
A valve according to claim 1, wherein said stationary core is columnar in shape and is inserted in a cylindrical valve housing consisting of a synthetic resin, and said first and second magnet chambers are partially defined by portions of said stationary core which comprise said first and second pole faces.
Claim 5
Dependent Claim
42 words
A valve according to claim 3, wherein said valve housing has one end comprising a bottom plate which opposes said first magnet chamber, and said vent hole communicating with said first pressure source is formed at a center of said bottom plate.
Claim 6
Dependent Claim
62 words
A valve according to claim 3, wherein said valve housing has a step at a portion defining said first magnet chamber such that an inner diameter thereof at a portion receiving said stationary core is large, and said stationary core is pressed into said valve housing from a direction of said second magnet chamber and is regulated in position by said step.
Claim 7
Dependent Claim
37 words
A valve according to claim 3, wherein an auxiliary housing defining said second magnet chamber is pressed into and held in position in said valve housing from an end thereof from which said stationary core is inserted.
Claim 8
Dependent Claim
35 words
A valve according to claim 3, wherein bobbin means is formed at a position around said cylindrical valve housing which corresponds to said stationary core, and excitation coil means is wound around said bobbin means.
Claim 9
Dependent Claim
27 words
A valve according to claim 7, wherein said excitation coil means comprises a single excitation coil to which an excitation current of a selected direction is supplied.
Claim 10
Dependent Claim
31 words
A valve according to claim 7, wherein said excitation coil wound around said bobbin means comprises first and second excitation coils to which excitation currents of opposite directions are selectively supplied.
Claim 11
Dependent Claim
18 words
A valve according to claim 9, wherein said first and second excitation coils are wound in two layers.
Claim 12
Dependent Claim
37 words
A valve according to claim 9, wherein said bobbin means comprises two bobbins which are separated along an axis of said stationary core, and said first and second excitation coils are respectively wound around said two bobbins.
Claim 13
Dependent Claim
54 words
A valve according to claim 1, wherein said stationary core is columnar in shape and ends thereof along an axial direction thereof define said first and second pole faces, and said vent hole means communicating between said first and second pole faces is formed to extend along a central axis of said stationary core.
Claim 14
Dependent Claim
57 words
A valve according to claim 1, wherein said stationary core is columnar in shape and is inserted in a cylindrical valve housing consisting of a synthetic resin, said vent hole means communicating between said first and second pole faces being formed between an outer surface of said stationary core and an inner surface of said valve housing.
Claim 15
Dependent Claim
51 words
A valve according to claim 13, wherein said stationary core is polygonal in sectional shape and said vent hole means disposed around the outer surface of said stationary core comprises a plurality of gaps formed between the outer surface of said stationary core and the inner surface of said valve housing.
Claim 16
Dependent Claim
52 words
A valve according to claim 13, wherein said stationary core has a sectional shape such that said stationary core coincides with said valve housing, and said vent hole means disposed around the outer surface of said stationary core comprises a plurality of grooves formed in the outer surface of said stationary core.
Claim 17
Dependent Claim
66 words
A valve according to claim 13, wherein a guide vent hole for communicating said vent hole means disposed around the outer surface of said stationary core to a central axis is formed on a surface of said stationary core which opposes said second permanent magnet, and said guide vent hole opens to oppose said second permanent magnet at a portion thereof corresponding to said central axis.
Claim 18
Dependent Claim
39 words
A valve according to claim 1, wherein a spring is interposed between said first pole face of said stationary core and said first permanent magnet so as to bias said first permanent magnet away from said first pole face.
Claim 19
Dependent Claim
62 words
A valve according to claim 17, wherein said spring has a biasing force which is strong enough to separate said first permanent magnet from said first pole face when said stationary core is not energized, and which allows said first permanent magnet to be attracted to said first pole face when said stationary core is energized to attract said first permanent magnet.
Claim 20
Dependent Claim
34 words
A valve according to claim 1, wherein spacer members of a nonmagnetic material are arranged on said first and second pole faces of said stationary core which oppose said first and second permanent magnets.
Claim 21
Dependent Claim
52 words
A valve according to claim 19, wherein a thickness of said spacer members is selected so that air gaps are sufficiently large to cancel attracting forces of said first and second permanent magnets acting on said stationary core when said stationary core is magnetized to repel said first and second permanent magnets.
References Cited (Backward Citations)
JPS4912274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |