US3799497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two stage solenoid operated valve
Assignee: Bayer AG
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Filing: 1972-04-20
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Granted: 1974-03-26
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Expires: 1992-04-20
Abstract
Abstract A two stage solenoid operated valve assembly having a first stage poppet movable for seating in a first stage orifice to control fluid flow in a second stage. A second stage poppet is movable for seating in a second stage orifice to control the main flow of fluid. Flow from the first stage orifice to the outlet is through a flow passage which is received within a longitudinal opening extending over the length of the second stage poppet. The second stage poppet moves longitudinally with respect to the flow passage.
Inventors
- 👤 K Zeuner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:47
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/40; F16K31/406
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
254 words
A two stage solenoid operated valve assembly comprising an orifice for a first of said two stages, first stage plug means movable between a first stage valve state stage and a state seating in and closing said first stage orifice for controlling flow of fluid through a second of said two stages. a second stage orifice opening directly into an outlet of said valve assembly, second stage plug means movable between a second stage valve open state and a state seating in and closing said second stage orifice for controlling flow of fluid from an inlet to an outlet of said valve assembly, solenoid means for electromagnetically moving said first stage plug means between said open and closed state for actuating by way of said control of fluid flow said second stage plug means respectively between said open and closed state, said second stage plug means having a longitudinal opening extending throughout the length thereof, and a tube in fluid communication with said first stage orifice being received within said longitudinal opening of said second stage plug means for providing fluid flow from said first stage orifice directly into said outlet during said first stage valve open state, said tube having one end rigidly secured with respect to said first stage orifice and having the other end and adjacent tubular surface floating and nonfixed and engaging only said second stage plug means, said other end being completely open and located slightly below said second stage orifice within the reduced pressure of the vena contracta.
Claim 2
Dependent Claim
254 words
A two stage solenoid operated valve assembly comprising an orifice for a first of said two stages, first stage plug means movable between a first stage valve state stage and a state seating in and closing said first stage orifice for controlling flow of fluid through a second of said two stages. a second stage orifice opening directly into an outlet of said valve assembly, second stage plug means movable between a second stage valve open state and a state seating in and closing said second stage orifice for controlling flow of fluid from an inlet to an outlet of said valve assembly, solenoid means for electromagnetically moving said first stage plug means between said open and closed state for actuating by way of said control of fluid flow said second stage plug means respectively between said open and closed state, said second stage plug means having a longitudinal opening extending throughout the length thereof, and a tube in fluid communication with said first stage orifice being received within said longitudinal opening of said second stage plug means for providing fluid flow from said first stage orifice directly into said outlet during said first stage valve open state, said tube having one end rigidly secured with respect to said first stage orifice and having the other end and adjacent tubular surface floating and nonfixed and engaging only said second stage plug means, said other end being completely open and located slightly below said second stage orifice within the reduced pressure of the vena contracta.
Claim 3
Dependent Claim
47 words
The valve assembly of claim 1 in which said longitudinal opening is a central chamber formed within said second stage plug means having a section of reduced inner diameter adjacent one end thereof and means for fluid sealing between said reduced inner diameter section and said tube.
Claim 4
Dependent Claim
70 words
The valve assembly of claim 2 in which there is provided second stage pilot means for providing fluid flow between said inlet and a chamber formed adjacent a first end of said second stage plug means for providing a force of direction tending to move said second stage plug means to said valve closed position, and fluid passageways for providing fluid flow between said chamber and said first stage orifice.
Claim 5
Dependent Claim
69 words
The valve assembly of claim 3 in which said second stage pilot means includes an orifice of diameter smaller than that of said first stage orifice to provide in said first stage valve open state a pressure divider so that the pressure in said chamber provides a force less than the force applied to a second end of said second stage plug means thereby opening said second stage valve.
Claim 6
Dependent Claim
33 words
The valve assembly of claim 1 in which there is provided first stage pole piece means forming a chamber for slideably receiving at least a minor portion of said first stage plug means.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |