US3729025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solenoid valve with stroke insensitive port
Assignee: Bendix Corp
•
Filing: 1970-08-31
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Granted: 1973-04-24
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Expires: 1990-08-31
Abstract
Abstract A solenoid valve has seat configurations comprising various patterns or arrangements of elongated slots. The maximum and minimum lift or stroke of the valve is related to slot width in a manner which materially reduces the differences in mass air flow resulting from variation in lift due to manufacturing tolerances. A supplemental orifice in series with the valve port may further control or limit air flow and minimize flow variation with varying valve strokes.
Inventors
- 👤 R Silvestrini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:59
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0644; F16K31/0655; F16K31/0658; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7859; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86759
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
109 words
A solenoid valve comprising: a coil; a plunger operated by said coil; a movable valve element attached to said plunger, said movable valve element having a stroke which may vary between predetermined limits; and a valve body formed with a valve seat cooperating with said movable valve element characterized by said valve seat comprising walls surrounding a central star-shaped opening and elongated oval openings positioned between the arms of said star-shaped opening; said star-shaped opening and oval openings having a width related to the stroke of said movable valve element within certain ratios such that mass air flow through the open valve varies less than permitted variation in stroke.
Claim 2
Dependent Claim
109 words
A solenoid valve comprising: a coil; a plunger operated by said coil; a movable valve element attached to said plunger, said movable valve element having a stroke which may vary between predetermined limits; and a valve body formed with a valve seat cooperating with said movable valve element characterized by said valve seat comprising walls surrounding a central star-shaped opening and elongated oval openings positioned between the arms of said star-shaped opening; said star-shaped opening and oval openings having a width related to the stroke of said movable valve element within certain ratios such that mass air flow through the open valve varies less than permitted variation in stroke.
Claim 3
Dependent Claim
30 words
The solenoid valve of claim 1 and further including: a restriction in series flow relationship with said valve seat and operative to limit flow therethrough to a predetermined maximum value.
Claim 4
Dependent Claim
16 words
The solenoid valve of claim 2 wherein said restriction is located downstream from said valve seat.
Claim 5
Dependent Claim
108 words
A solenoid valve comprising: a coil; a plunger operated by said coil; a movable valve element attached to said plunger, said movable valve element having a stroke which may vary between predetermined limits; and a valve body formed with a valve seat cooperating with said movable valve element characterized by said valve seat comprising walls surrounding a control cross-shaped opening and elongated openings positioned between the arms of said cross-shaped opening; said cross-shaped opening and elongated openings having a width related to the stroke of said movable valve element within certain ratios such that mass air flow through the open valve varies less than permitted variation in stroke.
Claim 6
Dependent Claim
108 words
A solenoid valve comprising: a coil; a plunger operated by said coil; a movable valve element attached to said plunger, said movable valve element having a stroke which may vary between predetermined limits; and a valve body formed with a valve seat cooperating with said movable valve element characterized by said valve seat comprising walls surrounding a control cross-shaped opening and elongated openings positioned between the arms of said cross-shaped opening; said cross-shaped opening and elongated openings having a width related to the stroke of said movable valve element within certain ratios such that mass air flow through the open valve varies less than permitted variation in stroke.
Claim 7
Dependent Claim
30 words
The solenoid valve of claim 4 and further including: a restriction in series flow relationship with said valve seat and operative to limit flow therethrough to a predetermined maximum value.
Claim 8
Dependent Claim
16 words
The solenoid valve of claim 7 wherein said restriction is located downstream from said valve seat.
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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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |