US3828818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid control valves
Assignee: Associated Engineering Ltd
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Filing: 1973-01-08
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Granted: 1974-08-13
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Expires: 1993-01-08
Abstract
Abstract A fluid control valve comprises a solenoid for generating an electromagnetic field, a fluid passage and a ferromagnetic ball for controlling fluid flow through the fluid passage. When the solenoid is energized with electricity the ferromagnetic ball is moved from a first position to a second position, in one of which positions the ball closes said fluid passage and in the other position the fluid passage is open.
Inventors
- 👤 N Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:08
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0603; F16K31/0624; F16K31/0627; F16K31/0631; F16K31/0606; F16K31/0644; F16K31/0651; F16K31/0655; F16K31/0658; F16K31/0662; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86622
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
179 words
A fluid control valve defining a fluid chamber which is closed by a member defining a fluid passage, and comprising a ferro-magnetic ball accommodated in said chamber to control fluid flow through said passage, said ball being movable between first and second positions in which the said fluid passage is closed and open respectively, a solenoid for generating a magnetic field to cause the ball to move from its first position to its second position, said solenoid including a central core defining a fluid supply passage and an additional fluid passage leading to said chamber and a coil which is carried by a spool forming an outer wall portion of said chamber and which encircles the core, whereby when the coil is not energised said ball is held in said first position by the flow or pressure of fluid and said additional passage is in communication with said fluid supply passage, and when said coil is energised said ball is held in said second position and said additional fluid passage is cut-off from communication with said fluid supply passage.
Claim 2
Dependent Claim
179 words
A fluid control valve defining a fluid chamber which is closed by a member defining a fluid passage, and comprising a ferro-magnetic ball accommodated in said chamber to control fluid flow through said passage, said ball being movable between first and second positions in which the said fluid passage is closed and open respectively, a solenoid for generating a magnetic field to cause the ball to move from its first position to its second position, said solenoid including a central core defining a fluid supply passage and an additional fluid passage leading to said chamber and a coil which is carried by a spool forming an outer wall portion of said chamber and which encircles the core, whereby when the coil is not energised said ball is held in said first position by the flow or pressure of fluid and said additional passage is in communication with said fluid supply passage, and when said coil is energised said ball is held in said second position and said additional fluid passage is cut-off from communication with said fluid supply passage.
Claim 3
Dependent Claim
176 words
A fluid control valve defining a fluid chamber which is closed by a member defining a fluid passage, and comprising a ferro-magnetic ball accommodated in said chamber to control fluid flow through said fluid passage, said ball being movable between first and second positions in which the fluid passage is closed and open respectively, a solenoid for generating a magnetic field to cause the ball to move from its first position to its second position, said solenoid incluidng a central core defining a fluid supply passage and an additional fluid passage leading to said chamber and a coil which encircles the core with said ball being positioned axially between the ends of the coil, whereby when the coil is not energized said ball is held in said first position by the flow or pressure of fluid and said additional passage is in communication with said fluid supply passage, and when said coil is energised said ball is held in said second position and said additional fluid passage is cut-off from communication with said fluid supply passage.
Claim 4
Dependent Claim
176 words
A fluid control valve defining a fluid chamber which is closed by a member defining a fluid passage, and comprising a ferro-magnetic ball accommodated in said chamber to control fluid flow through said fluid passage, said ball being movable between first and second positions in which the fluid passage is closed and open respectively, a solenoid for generating a magnetic field to cause the ball to move from its first position to its second position, said solenoid incluidng a central core defining a fluid supply passage and an additional fluid passage leading to said chamber and a coil which encircles the core with said ball being positioned axially between the ends of the coil, whereby when the coil is not energized said ball is held in said first position by the flow or pressure of fluid and said additional passage is in communication with said fluid supply passage, and when said coil is energised said ball is held in said second position and said additional fluid passage is cut-off from communication with said fluid supply passage.
Claim 5
Dependent Claim
35 words
A valve as set forth in claim 2, wherein the solenoid has an additional core which is disposed adjacent the said fluid passage in said member and which defines a guide bore for said ball.
Claim 6
Dependent Claim
33 words
A valve as set forth in claim 3, wherein both said cores have bevelled shoulders which project into said chamber to assist in concentrating the magnetic flux in the vicinity of the ball.
Claim 7
Dependent Claim
23 words
A valve as set forth in claim 2, wherein said ball and at least a part of said core are made of ferro-nickel.
Claim 8
Dependent Claim
22 words
A valve as set forth in claim 5, wherein the core includes an insert of ferro-nickel providing a seat for said ball.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |