US4805871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic valve
Assignee: Aisin Corp
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Filing: 1987-08-31
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Granted: 1989-02-21
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Expires: 2007-08-31
Abstract
Abstract An electromagnetic valve, comprises a casing for defining a flow passage therein; a valve member mounted in the casing for bi-directional movement between two positions for opening and closing the flow passage; an electromagnetic mechanism for moving the valve member in one of the two directions, including a core for magnetically attracting the valve member; a support for supporting the valve member in the casing and for moving the valve member in the other direction; and at least one resilient projection for limiting the movement of the valve member in the one direction for maintaining a separation between the valve member and the core.
Inventors
- 👤 Mamoru Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:02
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0644; F16K31/0655; F16K31/0658
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
187 words
An electromagnetic valve comprising: casing means for defining a flow passage therein; a valve member, including a plunger and a seal for a valve seat, mounted in the casing means for bi-directional movement in two directions for opening and closing the flow passage; electromagnetic means for moving the valve member in one of the two directions, including a core for magnetically attracting the valve member; a support including a resilient metal disc for supporting the valve member in the casing means, said metal disc moving the valve member in the other direction, said plunger and seal being attached to the metal disc on opposite sides thereof; means for limiting the movement of the valve member in the one direction for maintaining a separation between the valve member and the core, said limiting means including at least one resilient projection on the metal disc; and said casing means including a guide surface interacting with the resilient projection for limiting movement of the valve member in the one direction, said guide surface being inclined with respect to the direction of movement of the valve member in the one direction.
Claim 2
Dependent Claim
187 words
An electromagnetic valve comprising: casing means for defining a flow passage therein; a valve member, including a plunger and a seal for a valve seat, mounted in the casing means for bi-directional movement in two directions for opening and closing the flow passage; electromagnetic means for moving the valve member in one of the two directions, including a core for magnetically attracting the valve member; a support including a resilient metal disc for supporting the valve member in the casing means, said metal disc moving the valve member in the other direction, said plunger and seal being attached to the metal disc on opposite sides thereof; means for limiting the movement of the valve member in the one direction for maintaining a separation between the valve member and the core, said limiting means including at least one resilient projection on the metal disc; and said casing means including a guide surface interacting with the resilient projection for limiting movement of the valve member in the one direction, said guide surface being inclined with respect to the direction of movement of the valve member in the one direction.
Claim 3
Dependent Claim
23 words
The valve of claim 1 wherein the metal disc includes a series of cut out portions for increasing the resiliency of the disc.
Claim 4
Dependent Claim
159 words
An electromagnetic valve comprising: casing means for defining a flow passage therein; a valve member mounted in the casing means for bi-directional movement in two directions for opening and closing the flow passage; electromagnetic means for moving the valve member in one of the two directions, including a core for magnetically attracting the valve member; a resilient support attached to and supporting the valve member in the casing means and for moving the valve member in the other direction; means for limiting the movement of the valve member in the one direction for maintaining a separation between the valve member and the core, said limiting means including at least one resilient projection on the support; and said casing means including a guide surface interacting with the resilient projection for limiting movement of the valve member in the one direction, said guide surface being inclined with respect to the direction of movement of the valve member in the one direction.
Claim 5
Dependent Claim
159 words
An electromagnetic valve comprising: casing means for defining a flow passage therein; a valve member mounted in the casing means for bi-directional movement in two directions for opening and closing the flow passage; electromagnetic means for moving the valve member in one of the two directions, including a core for magnetically attracting the valve member; a resilient support attached to and supporting the valve member in the casing means and for moving the valve member in the other direction; means for limiting the movement of the valve member in the one direction for maintaining a separation between the valve member and the core, said limiting means including at least one resilient projection on the support; and said casing means including a guide surface interacting with the resilient projection for limiting movement of the valve member in the one direction, said guide surface being inclined with respect to the direction of movement of the valve member in the one direction.
Claim 6
Dependent Claim
27 words
The valve of claim 3 wherein said resilient support is a deformable plate spring mounted within the casing means and on which the valve seat is mounted.
Claim 7
Dependent Claim
37 words
The valve of claim 4 wherein said at least one resilient projection is formed as a part of said plate spring and makes moving contact with said guide surface in response to movement of said valve member.
Claim 8
Dependent Claim
16 words
The valve of claim 4 wherein said at least one resilient projection includes three resilient projections.
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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) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |