US3552275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric fluid actuator
Assignee: Boeing Co
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Filing: 1968-07-29
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Granted: 1971-01-05
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Expires: 1988-07-29
Abstract
Abstract Electric fluid actuator apparatus utilizing electrically conducting plates with a field control source whereby an electric or magnetic field is established between the plates to control the effective viscosity of fluid located therebetween. Flow of fluid within the actuator mechanism is initiated by constant flow pumps and controlled by the field control source to establish fluid pressures acting to displace the actuator mechanism.
Inventors
- 👤 Harold K Chaney
- 👤 Halvor T Strandrud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:41
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; C; C10; C10M; C10M171/00; C10M171/001; F15; F15B; F15B21/00; F15B21/06; F15B21/065; G; G05; G05D; G05D24/00; G05D24/02; H; H02; H02N; H02N11/00; H02N11/006; Y; Y10; Y10T; Y10T137/00; Y10T137/4456; Y10T137/4643
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
164 words
A dielectric fluid actuator apparatus comprising: a housing enclosing a chamber, said housing defining a longitudinal axis and equipped with two end walls; reciprocating output means extending exteriorly of said housing and mounted for longitudinal movement within said chamber; an external source of dielectric fluid; valve means carried by said output means and located within said chamber comprising: a plurality of electrically conducting members arranged in radially spaced relationship to one another about said longitudinal axis, means for applying electrical potential across said members to thereby change the effective viscosity of fluid located between said members, external means for delivering fluid under pressure to said chamber between said valve means and one of said two end walls; means for exhausting fluid from said chamber between said valve means and the other of said two end walls; and wherein the flow of said dielectric fluid through said valve means can be controlled to impart a predetermined force to said output means in a longitudinal direction.
Claim 2
Dependent Claim
164 words
A dielectric fluid actuator apparatus comprising: a housing enclosing a chamber, said housing defining a longitudinal axis and equipped with two end walls; reciprocating output means extending exteriorly of said housing and mounted for longitudinal movement within said chamber; an external source of dielectric fluid; valve means carried by said output means and located within said chamber comprising: a plurality of electrically conducting members arranged in radially spaced relationship to one another about said longitudinal axis, means for applying electrical potential across said members to thereby change the effective viscosity of fluid located between said members, external means for delivering fluid under pressure to said chamber between said valve means and one of said two end walls; means for exhausting fluid from said chamber between said valve means and the other of said two end walls; and wherein the flow of said dielectric fluid through said valve means can be controlled to impart a predetermined force to said output means in a longitudinal direction.
Claim 3
Dependent Claim
26 words
Apparatus according to claim 1 which includes a plurality of said valve means and said housing includes an intermediate wall dividing said chamber into two portions.
Claim 4
Dependent Claim
34 words
Apparatus according to claim 1 which further includes flow control means for controlling flow of said dielectric fluid within said chamber between said valve means and said means for exhausting fluid from said chamber.
Claim 5
Dependent Claim
45 words
Apparatus according to claim 3 wherein said flow control means comprises: a plurality of electrically conducting members arranged in spaced relationship to one another and means for applying electrical potential across said members to thereby change the effective viscosity of fluid located between said members.
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |