US4666125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low leakage solenoid valve
Assignee: Eaton Corp
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Filing: 1986-02-14
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Granted: 1987-05-19
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Expires: 2006-02-14
Abstract
Abstract A normally closed high pressure solenoid valve structure including a plunger pin spring-urged against a composite valve seat having a steel reinforcing ring positioned against the seat and backed up by a fixed spacer. The seat has a projecting neck with orifice. The steel reinforcing ring surrounds and contains any radial movement of the seat which is of elastic material softer than the plunger pin which provides a very low leakage level across the valve from either direction. A lost-motion connection between the plunger pin and the solenoid armature provides that the spring load on the plunger pin is retained even with cold flow of the seating material during cycling.
Inventors
- 👤 Maynard W. Marts
- 👤 Michael F. Mendoza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:05
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0644; F16K31/0655
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
160 words
In a solenoid high pressure valve structure including a conventional coil, fixed core and armature, the improvement comprising a valve structure including: a body having a bore therein; a slidable plunger pin attached to the armature positioned in the bore, the pin having a conical face for sealing engagement with a seat; a non-metallic seat member positioned in the bore with a concentric passage therethrough including a reduced diameter neck portion with an annular contact surface thereon; a reinforcing ring means positioned against the seat member and surrounding the neck portion to contain any radial deformation or axial movement of the seat member; biasing means in the bore urging the conical face of the plunger pin against the contact surface of the seat member in a high pressure sealing relationship; a spacer member, fixed in the bore, located between the reinforcing ring and the armature and positioned against the reinforcing ring which in turn is positioned against the seat member.
Claim 2
Dependent Claim
160 words
In a solenoid high pressure valve structure including a conventional coil, fixed core and armature, the improvement comprising a valve structure including: a body having a bore therein; a slidable plunger pin attached to the armature positioned in the bore, the pin having a conical face for sealing engagement with a seat; a non-metallic seat member positioned in the bore with a concentric passage therethrough including a reduced diameter neck portion with an annular contact surface thereon; a reinforcing ring means positioned against the seat member and surrounding the neck portion to contain any radial deformation or axial movement of the seat member; biasing means in the bore urging the conical face of the plunger pin against the contact surface of the seat member in a high pressure sealing relationship; a spacer member, fixed in the bore, located between the reinforcing ring and the armature and positioned against the reinforcing ring which in turn is positioned against the seat member.
Claim 3
Dependent Claim
28 words
In a solenoid valve as set forth in claim 1, wherein the seat member is an elastic material having a hardness less than that of the plunger pin.
Claim 4
Dependent Claim
26 words
In a solenoid valve as set forth in claim 1, wherein the seat member is Nylon having a hardness less than that of the plunger pin.
Claim 5
Dependent Claim
67 words
In a solenoid valve as set forth in claim 1, including a spacer means in the bore limiting the armature movement away from the fixed core, a lost-motion connection means between the armature and the slidable plunger pin whereby the plunger pin continues to carry its spring load after axial displacement of the plunger pin due to cold flow of the seat member at the contact surface.
Claim 6
Dependent Claim
32 words
In a solenoid valve as set forth in claim 4, wherein the lost-motion connection means comprises a lateral pin passing through the plunger pin and an oversized lateral opening in the armature.
Claim 7
Dependent Claim
43 words
In a solenoid valve as set forth in claim 4, wherein the lost-motion connection means comprises a guide bore in the armature with an annular groove therein, a locking ring fixedly attached to the plunger pin and loosely positioned within said annular groove.
Claim 8
Dependent Claim
28 words
In a solenoid valve as set forth in claim 1, wherein the reduced diameter neck portion has a wall thickness less than the diameter of the concentric passage.
Claim 9
Dependent Claim
78 words
In a solenoid valve as set forth in claim 1, wherein the seat member is nylon having a hardness less than that of the plunger pin, including a lost-motion means between the armature and the plunger pin, a reduced diameter neck portion having a wall thickness of less than the diameter of the concentric passage, the seat member having an outwardly extending flange from said bore which prevents any axial movement of the seat member in the bore.
Claim 10
Dependent Claim
21 words
In a solenoid valve as set forth in claim 1, wherein the seat member includes a flange extending outside the bore.
Claim 11
Dependent Claim
34 words
In a solenoid valve as set forth in claim 1, wherein the biasing means is sufficiently strong to hold the plunger pin closed with hight pressure in the concentric passage side of the valve.
Claim 12
Dependent Claim
17 words
In a solenoid valve as set forth in claim 1 wherein the seat member is glass-filled nylon.
Claim 13
Dependent Claim
31 words
In a solenoid valve as set forth in claim 1 wherein the fixed spacer supports the biasing means and a guiding means which accurately directs the plunger pin into the seat.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-18 | 1990-11-17 | 1991-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-18 | 1994-11-17 | 1995-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-18 | 1998-11-17 | 1999-05-19 | $7700.00 | Window Closed / Lapsed |