US3818927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Normally open solenoid operated valve assembly with relief function
Assignee: Control Concepts Inc
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Filing: 1973-06-18
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Granted: 1974-06-25
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Expires: 1993-06-18
Abstract
Abstract A normally open solenoid operated valve assembly having a poppet movable between a valve normally open position and a position for seating in and closing an orifice. A movable armature has a reduced section for engaging the poppet. A range spring tending to bias the poppet to the valve closed position while a bias spring tends to bias the armature to engage and move the poppet to the valve open position. Since the bias spring has a greater spring force than the range spring, the poppet is normally maintained in the valve open position. To close the valve, a solenoid is energized to move the armature in a direction allowing the range spring to bias the poppet closed. When closed, the valve assembly provides a relief function if upstream pressure becomes greater than a predetermined value which may be adjusted by varying the spring force of the range spring.
Inventors
- 👤 K Zeuner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:48
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0644; F16K31/0655; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2562
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
207 words
A normally open solenoid operated valve assembly providing a relief function in which upstream pressure flows into a first flow channel of said valve assembly and out of a second flow channel of said valve assembly comprising an orifice in fluid communication with said first flow channel, plug means movable between a valve normally open position and a position for seating in and closing said orifice, a movable armature having a section for engaging said plug means, range resilient means tending to bias said plug means to said valve closed position, bias resilient means tending to bias said armature to engage and move said plug means to said valve open position, said bias resilient means having greater resilient force than said range resilient means whereby said bias spring means normally maintains said plug means in said valve open position, and solenoid means adapted to be energized for providing an electromagnetic attractive force to move said armature in a direction for allowing said range resilient means to bias said plug means to the valve closed position whereby when the force of fluid in the first flow channel is sufficient to overcome the resilient force of said range resilient means said plug means opens thereby providing said relief function.
Claim 2
Dependent Claim
207 words
A normally open solenoid operated valve assembly providing a relief function in which upstream pressure flows into a first flow channel of said valve assembly and out of a second flow channel of said valve assembly comprising an orifice in fluid communication with said first flow channel, plug means movable between a valve normally open position and a position for seating in and closing said orifice, a movable armature having a section for engaging said plug means, range resilient means tending to bias said plug means to said valve closed position, bias resilient means tending to bias said armature to engage and move said plug means to said valve open position, said bias resilient means having greater resilient force than said range resilient means whereby said bias spring means normally maintains said plug means in said valve open position, and solenoid means adapted to be energized for providing an electromagnetic attractive force to move said armature in a direction for allowing said range resilient means to bias said plug means to the valve closed position whereby when the force of fluid in the first flow channel is sufficient to overcome the resilient force of said range resilient means said plug means opens thereby providing said relief function.
Claim 3
Dependent Claim
48 words
The valve assembly of claim 1 in which there is provided means for adjusting the resilient force of said range resilient means thereby to vary to a predetermined value the maximum value of the force of the fluid and thus the fluid pressure in said first flow channel.
Claim 4
Dependent Claim
64 words
The valve assembly of claim 2 in which said range resilient means is a range spring engaging said plug means and tending to bias said plug means to said valve closed position, and in which said bias resilient means is a bias spring engaging said armature and tending to bias said armature to engage and move said plug means to said valve open position.
Claim 5
Dependent Claim
93 words
The valve assembly of claim 3 in which said range spRing is in compression between said adjusting means and a surface of said plug means and said bias spring is in compression between a lower surface of said armature and a surface adjacent said orifice, said bias spring having a higher valued spring constant than said range spring thereby providing a force balance system in which said bias spring must only be sufficiently greater in spring force than that of said range spring to maintain said valve assembly in its normally open position.
Claim 6
Dependent Claim
44 words
The valve assembly of claim 4 in which said adjusting means comprises a plunger for engaging said range spring and screw adjustment means for raising or lowering said plunger with said screw adjusting means being accessible for turning from exterior of said valve assembly.
Claim 7
Dependent Claim
37 words
The valve assembly of claim 5 in which said plug means includes a guide portion and in which said armature comprises a chamber having a reduced diameter section for engaging said guide portion of said plug means.
Claim 8
Dependent Claim
78 words
The valve assembly of claim 6 in which there is provided pole piece means fixedly disposed between said armature and said orifice and having a chamber for receiving the entire lower portion of said plug means and a major portion of said bias spring and having an upper surface forming an air gap with said armature, said attractive force being produced between said upper surface and said armature for moving said armature to further compress said bias spring.
Claim 9
Dependent Claim
94 words
The valve assembly of claim 2 in which there is provided a second stage valve assembly having a second stage poppet and orifice, said first flow channel in fluid communication above said poppet, upstream pressure applied by way of a third flow channel (1) below said poppet and (2) through a flow restriction to said first flow channel, said second flow channel and said second stage orifice leading to tank whereby said second stage poppet is controlled to be in its normally open position when said plug means is in said normally open position.
Claim 10
Dependent Claim
58 words
The valve assembly of claim 8 in which said third flow channel leads to a system requiring fluid pressure whereby with said second valve assembly normally open said upstream pressure is dumped to tank and in the closed position said second poppet closes said second orifice so that said upstream pressure is maintained at a maximum predetermined value.
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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |