Patent US3592211A successfully refreshed from Google Patents.
US3592211A
Expired / Lapsed
US
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Pressure-regulating valve
Assignee: Hawker Siddeley Dynamics Ltd
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Filing: 1968-11-26
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Granted: 1971-07-13
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Expires: 1988-11-26
Abstract
Abstract A pressure-regulating valve is provided, especially for an antiskid braking system, which has two fluidic stages of amplification, the first being a jet pipe regulator device and the second a spool valve in a cylinder. The input signal to the second stage is applied to one end of the spool valve and proportions of the supply and regulated output pressures are applied to the opposite end.
Inventors
- 👤 Cyril Spalding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:32
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/08; G; G05; G05D; G05D16/00; G05D16/024; G05D16/20; G05D16/2093; G05D16/2097; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2322; Y10T137/2409; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/8659; Y10T137/86614
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
381 words
A pressure-regulating valve, including in combination: a first regulating stage comprising first stage fluid inlet means receiving fluid pressure from a first stage pressure fluid supply conduit, first stage fluid pressure output means having transmitted thereto a variable percentage of the fluid pressure applied to said first stage fluid inlet means, first stage pressure-regulating means operable in response to a first stage control signal to vary said percentage of the first stage inlet fluid pressure that is transmitted to said first stage fluid pressure output means; a controlling input device applying said first stage control signal to said first stage pressureregulating means; a second regulating stage comprising second stage fluid inlet means receiving fluid pressure from a second stage pressure fluid supply conduit, a fluid exhaust line, second stage fluid pressure output means having transmitted thereto a variable percentage of the fluid pressure applied to said second stage fluid inlet means, second stage regulating means comprising a ported cylinder and a valve spool moving axially therein in response to a plurality of second stage fluid pressure control signals to control communication of said second stage fluid output means alternatively with said second stage fluid inlet means and said fluid exhaust line and thereby vary said percentage of the second stage inlet fluid pressure that is transmitted to said second stage fluid pressure output means; interstage fluid conduit means applying the output pressure of said first stage fluid pressure output means to one end of said valve spool to constitute a first one of said plurality of second stage fluid pressure control signals, two pistons of smaller diameter than said valve spool which bear on the opposite end of said spool; feedback means applying the output pressure of said second stage fluid pressure output means as negative feedback to one of said two pistons to constitute a second one of said plurality of second stage fluid pressure control signals acting in opposition to said first one of said second stage control signals; and further conduit means applying the input pressure of said second stage fluid inlet means to the other of said two pistons to constitute a third one of said plurality of second stage fluid pressure control signals acting in opposition to said first one of said second stage control signals.
Claim 2
Dependent Claim
381 words
A pressure-regulating valve, including in combination: a first regulating stage comprising first stage fluid inlet means receiving fluid pressure from a first stage pressure fluid supply conduit, first stage fluid pressure output means having transmitted thereto a variable percentage of the fluid pressure applied to said first stage fluid inlet means, first stage pressure-regulating means operable in response to a first stage control signal to vary said percentage of the first stage inlet fluid pressure that is transmitted to said first stage fluid pressure output means; a controlling input device applying said first stage control signal to said first stage pressureregulating means; a second regulating stage comprising second stage fluid inlet means receiving fluid pressure from a second stage pressure fluid supply conduit, a fluid exhaust line, second stage fluid pressure output means having transmitted thereto a variable percentage of the fluid pressure applied to said second stage fluid inlet means, second stage regulating means comprising a ported cylinder and a valve spool moving axially therein in response to a plurality of second stage fluid pressure control signals to control communication of said second stage fluid output means alternatively with said second stage fluid inlet means and said fluid exhaust line and thereby vary said percentage of the second stage inlet fluid pressure that is transmitted to said second stage fluid pressure output means; interstage fluid conduit means applying the output pressure of said first stage fluid pressure output means to one end of said valve spool to constitute a first one of said plurality of second stage fluid pressure control signals, two pistons of smaller diameter than said valve spool which bear on the opposite end of said spool; feedback means applying the output pressure of said second stage fluid pressure output means as negative feedback to one of said two pistons to constitute a second one of said plurality of second stage fluid pressure control signals acting in opposition to said first one of said second stage control signals; and further conduit means applying the input pressure of said second stage fluid inlet means to the other of said two pistons to constitute a third one of said plurality of second stage fluid pressure control signals acting in opposition to said first one of said second stage control signals.
Claim 3
Dependent Claim
59 words
A valve according to claim 1, wherein said first regulating stage is constituted by a relay of the jet pipe regulator type, in which said first stage fluid pressure output means comprises a receiver port and said first stage regulating means comprises a jet nozzle movable relatively to said receiver port in response to said first stage control signal.
Claim 4
Dependent Claim
46 words
A valve according to claim 2, wherein said controlling input device is a torque motor providing as said first stage control signal a small mechanical movement proportional to an electrical input signal, this mechanical movement being applied to said jet nozzle of the jet pipe regulator.
References Cited (Backward Citations)
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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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |