US4278959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current-stroke proportional type solenoid valve
Assignee: Hitachi Ltd
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Filing: 1979-09-04
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Granted: 1981-07-14
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Expires: 1999-09-04
Abstract
Abstract A current-stroke proportional type solenoid valve has a movable plunger disposed around the inner peripheral wall of a bobbin with a coil therearound, a stator core disposed face to face with the movable plunger and forming the magnetic circuit, a bias spring for always biasing the movable plunger in one direction and the stroke of the movable plunger being determined by magnitude of the current flowing through the coil. In the solenoid valve, the output rod is axially supported by a first lubricant resin and the movable plunger also by a second lubricant resin.
Inventors
- 👤 Torazo Nishimiya
- 👤 Masamitsu Okumura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:50
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1607; H01F7/165
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
135 words
A current-stroke proportional type solenoid valve having a movable plunger disposed around the inner peripheral wall of a bobbin with a coil therearound, a stator core disposed face to face with the movable plunger and forming the magnetic circuit, a bias spring for always biasing the movable plunger in one direction , and the stroke of the movable plunger being determined by magnitude of the current flowing through the coil, wherein said output rod is axially supported by a first lubricant resin bearing and said movable plunger is axially supported by a second lubricant resin bearing, wherein said second resin bearing is a guide projection made of lubricant resin secured to the bobbin, being slidably inserted into a guide hole formed in the portion of said movable plunger not having the output rod fixed thereto.
Claim 2
Dependent Claim
135 words
A current-stroke proportional type solenoid valve having a movable plunger disposed around the inner peripheral wall of a bobbin with a coil therearound, a stator core disposed face to face with the movable plunger and forming the magnetic circuit, a bias spring for always biasing the movable plunger in one direction , and the stroke of the movable plunger being determined by magnitude of the current flowing through the coil, wherein said output rod is axially supported by a first lubricant resin bearing and said movable plunger is axially supported by a second lubricant resin bearing, wherein said second resin bearing is a guide projection made of lubricant resin secured to the bobbin, being slidably inserted into a guide hole formed in the portion of said movable plunger not having the output rod fixed thereto.
Claim 3
Dependent Claim
19 words
A current-stroke proportional solenoid valve according to claim 1, wherein said guide projection and said bobbin are integrally formed.
Claim 4
Dependent Claim
126 words
A current-stroke proportional solenoid valve having a movable plunger disposed around the inner peripheral wall of a bobbin with a coil therearound, a stator core disposed face to face with the movable plunger and forming the magnetic circuit, a bias spring for always biasing the movable plunger in one direction, and the stroke of the movable plunger being determined by magnitude of the current flowing through the coil, wherein said output rod is axially supported by a first lubricant resin bearing and said movable plunger is axially supported by a second lubricant resin bearing, wherein said second resin bearing is a guide tube made of lubricant resin which is fitted around the inner peripheral wall of said bobbin and through which said movable plunger is slidable.
Claim 5
Dependent Claim
126 words
A current-stroke proportional solenoid valve having a movable plunger disposed around the inner peripheral wall of a bobbin with a coil therearound, a stator core disposed face to face with the movable plunger and forming the magnetic circuit, a bias spring for always biasing the movable plunger in one direction, and the stroke of the movable plunger being determined by magnitude of the current flowing through the coil, wherein said output rod is axially supported by a first lubricant resin bearing and said movable plunger is axially supported by a second lubricant resin bearing, wherein said second resin bearing is a guide tube made of lubricant resin which is fitted around the inner peripheral wall of said bobbin and through which said movable plunger is slidable.
Claim 6
Dependent Claim
20 words
A current-stroke proportional solenoid valve according to claim 3, wherein said guide tube is made of resin containing solid lubricant.
Claim 7
Dependent Claim
16 words
A current-stroke proportional solenoid valve according to claim 4, wherein said solid lubricant is molybdenum bisulfide.
Claim 8
Dependent Claim
158 words
A current-stroke proportional solenoid valve having a movable plunger disposed around the inner peripheral wall of a bobbin with a coil therearound, a stator core disposed face to face with the movable plunger and forming the magnetic circuit, a bias spring for always biasing the movable plunger in one direction, and the stroke of the movable plunger being determined by magnitude of the current flowing through the coil, wherein said output rod is axially supported by a first lubricant resin bearing and said movable plunger is axially supported by a second lubricant resin bearing, wherein said second resin bearing is the combination of a guide tube made of lubricant resin which is fitted around the inner wall of said bobbin and through which said movable plunger is slidably disposed and a projection of lubricant resin which is slidably inserted in a guide hole formed in the portion of said movable plunger not having the output rod fixed thereto.
Claim 9
Dependent Claim
158 words
A current-stroke proportional solenoid valve having a movable plunger disposed around the inner peripheral wall of a bobbin with a coil therearound, a stator core disposed face to face with the movable plunger and forming the magnetic circuit, a bias spring for always biasing the movable plunger in one direction, and the stroke of the movable plunger being determined by magnitude of the current flowing through the coil, wherein said output rod is axially supported by a first lubricant resin bearing and said movable plunger is axially supported by a second lubricant resin bearing, wherein said second resin bearing is the combination of a guide tube made of lubricant resin which is fitted around the inner wall of said bobbin and through which said movable plunger is slidably disposed and a projection of lubricant resin which is slidably inserted in a guide hole formed in the portion of said movable plunger not having the output rod fixed thereto.
Claim 10
Dependent Claim
20 words
A current-stroke proportional solenoid valve according to claim 6, wherein said guide tube and said guide projection are integrally formed.
References Cited (Backward Citations)
US3851285A
Cited
DE2330839A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |