Patent US3765644A successfully refreshed from Google Patents.
US3765644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled air gap in a solenoid operated valve
Assignee: Bayer AG
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Filing: 1972-01-19
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Granted: 1973-10-16
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Expires: 1992-01-19
Abstract
Abstract A single stage normally open solenoid operated poppet valve which has a control orifice and a poppet which moves between a valve open and a seated position. A pole piece adjacent the poppet is spaced from and forms an air gap with an armature which contacts the poppet. On application of electromagnetic flux line flow through the armature and pole piece, the air gap is decreased to a finite predetermined distance of value to provide sufficient attractive force to seat and maintain seated the poppet.
Inventors
- 👤 K Zeuner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:10
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0644; F16K31/0655
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
152 words
A normally open valve assembly comprising an orifice for controlling inlet flow of fluid. plug means moveable between a valve normally open position and a position for seating in and closing said orifice, an armature for contacting said plug means, pole piece means forming a chamber for slideably receiving substantially all of said plug means and having a surface spaced from and forming an air gap with said armature, means producing a circuit of electromagnetic flux lines flow through said armature, said air gap and said pole piece means for providing an attractive force between said armature and said pole piece means seating said Plug means in and closing said orifice, and said air gap being decreased in magnitude to a finite predetermined distance of magnitude to provide a sufficient value of said attractive force to seat and maintain seated said plug means against the force of said inlet flow of fluid.
Claim 2
Dependent Claim
152 words
A normally open valve assembly comprising an orifice for controlling inlet flow of fluid. plug means moveable between a valve normally open position and a position for seating in and closing said orifice, an armature for contacting said plug means, pole piece means forming a chamber for slideably receiving substantially all of said plug means and having a surface spaced from and forming an air gap with said armature, means producing a circuit of electromagnetic flux lines flow through said armature, said air gap and said pole piece means for providing an attractive force between said armature and said pole piece means seating said Plug means in and closing said orifice, and said air gap being decreased in magnitude to a finite predetermined distance of magnitude to provide a sufficient value of said attractive force to seat and maintain seated said plug means against the force of said inlet flow of fluid.
Claim 3
Dependent Claim
23 words
The valve assembly of claim 1 in which there is provided means for biasing said plug means to said valve normally open position.
Claim 4
Dependent Claim
77 words
The valve assembly of claim 2 in which there is provided a housing for said armature, pole piece means and plug means, said housing being of very high magnetically permeable material except in the area generally adjacent said air gap whereby said flux lines flow through said housing and provide a concentration of flux lines through said armature and said air gap to said spaced surface of said pole piece to provide said value of attractive force.
Claim 5
Dependent Claim
53 words
The valve assembly of claim 3 in which said plug means having a surface for said contact with said armature, said plug means being of length with respect to said orifice to prevent said armature from touching said pole piece in said plug means seating position thereby providing said decreased size air gap.
Claim 6
Dependent Claim
52 words
The valve assembly of claim 4 in which said plug means comprises a poppet having a guide portion and a portion terminating in a valve plug, said guide portion having side walls which contact said chamber and are dimensioned to provide alignment of said valve plug into and out of said orifice.
Claim 7
Dependent Claim
42 words
The valve assembly of claim 2 in which said plug means has walls which contact and slide within said chamber and in which said walls and said chamber are dimensioned to provide proper seating alignment of said plug means in said orifice.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |