Patent US5878398A successfully refreshed from Google Patents.
Patent US3621880A successfully refreshed from Google Patents.
US3621880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jet pipe servo valve
Assignee: Bell Aerospace Corp
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Filing: 1969-06-13
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Granted: 1971-11-23
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Expires: 1989-06-13
Abstract
Abstract Disclosed is a jet pipe-type servo valve wherein the feed tube is disposed angularly with respect to a flapper to which it is affixed and which is movable by a torque motor the armature of which is connected to the flapper. The feed tube has one end thereof affixed rigidly to the housing and the other end thereof terminating in a nozzle which is positioned adjacent a receiver. The output ports of the receiver are connected to the end chambers of a cylinder within which a power control valve is slidably positioned so as to control the flow of fluid under pressure from a source thereof to an apparatus to be positioned such as an actuator. The jet pipe stage and the power control valve stage are isolated from each other.
Inventors
- 👤 James M Jessee
- 👤 Ernest Niederer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:52
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0436; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2322; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/86606; Y10T137/86614
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
220 words
A jet pipe servovalve comprising: a housing having a body portion; a torque motor mounted on said body portion and including a movable member adapted for pivotal movement in response to electrical signals applied thereto, said member defining a first longitudinal axis; a feed tube mounted in said body portion, separate from said movable member, adapted to receive fluid under pressure, having a receiving end portion and an ejecting end portion and defining a second longitudinal axis, said second axis being angularly positioned with respect to said first axis and offset therefrom so that said axes do not intersect; means fixedly securing said receiving end portion of said feed tube to said body portion; flexible link means securing said feed tube to said member thereby to cause said ejection and portion of said feed tube to move responsive to pivotal movement of said member; receiver port means positioned adjacent said ejector end portion of said feed tube for receiving fluid ejected therefrom, said receiver port means being rotatable to effect adjustment; a control valve connected to receive fluid pressure from said receiver port means and to move responsively thereto to control the flow of fluid from a source thereof to a load; and means isolating the fluid in said control valve area from the fluid in said ejection-receiver port area.
Claim 2
Dependent Claim
220 words
A jet pipe servovalve comprising: a housing having a body portion; a torque motor mounted on said body portion and including a movable member adapted for pivotal movement in response to electrical signals applied thereto, said member defining a first longitudinal axis; a feed tube mounted in said body portion, separate from said movable member, adapted to receive fluid under pressure, having a receiving end portion and an ejecting end portion and defining a second longitudinal axis, said second axis being angularly positioned with respect to said first axis and offset therefrom so that said axes do not intersect; means fixedly securing said receiving end portion of said feed tube to said body portion; flexible link means securing said feed tube to said member thereby to cause said ejection and portion of said feed tube to move responsive to pivotal movement of said member; receiver port means positioned adjacent said ejector end portion of said feed tube for receiving fluid ejected therefrom, said receiver port means being rotatable to effect adjustment; a control valve connected to receive fluid pressure from said receiver port means and to move responsively thereto to control the flow of fluid from a source thereof to a load; and means isolating the fluid in said control valve area from the fluid in said ejection-receiver port area.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |