Patent US4759528A successfully refreshed from Google Patents.
US4759528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve actuator
Assignee: Boeing North American Inc
•
Filing: 1987-11-16
•
Granted: 1988-07-26
•
Expires: 2007-11-16
Abstract
Abstract A lightweight propellant valve is provided which incorporates a magnetic flux-shifting actuator associated with a magnetic coil for determining a flux flow path therein.
Inventors
- 👤 Donald H. Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:35
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0644; F16K31/0655; F16K31/0658; H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1638
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
164 words
A lightweight propellant valve comprising in combination: (a) a housing defining a top and base portion; (b) a housing cavity intermediate the top and base portion; (c) an inlet port and an outlet port communicating with the housing cavity; (d) a spring biased armature located within the cavity and movable from a closed position to an open position; (e) armature seating surfaces; (f) a magnetic coil disposed within the housing based portion; (g) a magnetic flux-shifting actuator associated with the magnetic coil and further comprising in combination; (i) a piezoelectric transducer; (ii) a stress-sensitive amorphous magnetic material which when stressed by the transducer modulates the magnetic coil magnetic flux by rotating the magnetic domains on the amorphous magnetic material; and (h) means for activating the magnetic-flux shifting actuator to modify a magnetic flux path such that a flux flow is established from within the base portion of the housing through the armature to move the armature from a closed position to an open position.
Claim 2
Dependent Claim
164 words
A lightweight propellant valve comprising in combination: (a) a housing defining a top and base portion; (b) a housing cavity intermediate the top and base portion; (c) an inlet port and an outlet port communicating with the housing cavity; (d) a spring biased armature located within the cavity and movable from a closed position to an open position; (e) armature seating surfaces; (f) a magnetic coil disposed within the housing based portion; (g) a magnetic flux-shifting actuator associated with the magnetic coil and further comprising in combination; (i) a piezoelectric transducer; (ii) a stress-sensitive amorphous magnetic material which when stressed by the transducer modulates the magnetic coil magnetic flux by rotating the magnetic domains on the amorphous magnetic material; and (h) means for activating the magnetic-flux shifting actuator to modify a magnetic flux path such that a flux flow is established from within the base portion of the housing through the armature to move the armature from a closed position to an open position.
Claim 3
Dependent Claim
24 words
The propellant valve of claim 1 wherein the stress sensitive magnetic material is an alloy of iron, nickel, silicon, boron, carbon or combinations thereof.
References Cited (Backward Citations)
US4201837A
Cited
US4403765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-26 | 1992-01-25 | 1992-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-26 | 1996-01-25 | 1996-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-26 | 2000-01-25 | 2000-07-26 | $7700.00 | Window Closed / Lapsed |