Patent US4003640A successfully refreshed from Google Patents.
US4003640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-hydraulic driver for deformable face plate
Assignee: Raytheon Co
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Filing: 1975-06-23
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Granted: 1977-01-18
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Expires: 1995-06-23
Abstract
Abstract Electro-hydraulic driver has an electro-mechanical actuator which controls the hydraulic fluid flow control orifice. The hydraulic fluid orifice is an annulus which is connected to a cylinder having minimum volume which is supplied from a hydraulic source through a flow restriction. The piston acts against a spring so that with electrical actuation, piston motion is controlled.
Inventors
- 👤 Siegfried Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:22
CPC Classifications
G; G02; G02B; G02B26/00; G02B26/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
165 words
In combination: a body; a plurality of electro-hydraulic-mechanical actuators, each of said actuators having a housing, and each of said actuators having an electro-mechanical device, a mechanical-hydraulic valve, a hydraulic-mechanical piston and a spring each mounted with respect to said body; each said electro-mechanical device being mounted between said body and said valve so that upon electrical actuation of said electro-mechanical device, said electro-mechanical device moves a portion of said valve to control hydraulic flow through said valve to control hydraulic pressure on said piston, said piston being connected to said spring and said spring being connected to said body so that upon change in hydraulic pressure on said piston, said piston moves with respect to said body by resilient deflection of said spring; and a face plate mounted with respect to said body, each of said pistons engaging with said face plate to deflect said face plate so that the shape of said face plate is controlled by electric signals to said electro-mechanical devices.
Claim 2
Dependent Claim
165 words
In combination: a body; a plurality of electro-hydraulic-mechanical actuators, each of said actuators having a housing, and each of said actuators having an electro-mechanical device, a mechanical-hydraulic valve, a hydraulic-mechanical piston and a spring each mounted with respect to said body; each said electro-mechanical device being mounted between said body and said valve so that upon electrical actuation of said electro-mechanical device, said electro-mechanical device moves a portion of said valve to control hydraulic flow through said valve to control hydraulic pressure on said piston, said piston being connected to said spring and said spring being connected to said body so that upon change in hydraulic pressure on said piston, said piston moves with respect to said body by resilient deflection of said spring; and a face plate mounted with respect to said body, each of said pistons engaging with said face plate to deflect said face plate so that the shape of said face plate is controlled by electric signals to said electro-mechanical devices.
Claim 3
Dependent Claim
54 words
The combination of claim 1 wherein said valve comprises a valve plate and an orifice, said valve plate being mounted to be relatively moved by said electro-mechanical device and said orifice being directed toward said valve plate so that control of said electro-mechanical device controls the flow of hydraulic fluid out of said orifice.
Claim 4
Dependent Claim
24 words
The combination of claim 2 wherein said orifice has a central valve plug therein to define an annular orifice opening around said valve plug.
Claim 5
Dependent Claim
53 words
The combination of claim 3 wherein said valve plate has a central opening therein and a peripheral opening therearound so that hydraulic fluid under pressure discharging from said orifice toward said valve plate can discharge radially inward through said central opening in said valve plate and radially outward peripherally around said valve plate.
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) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |