Patent US2436777A successfully refreshed from Google Patents.
US3919923A
Expired / Lapsed
US
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Fluid flow control valve
Assignee: Northrop Grumman Properties Ltd
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Filing: 1974-10-03
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Granted: 1975-11-18
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Expires: 1994-10-03
Abstract
Abstract A fluid flow control valve for use in a fluid actuated servo mechanism is provided with a nozzle having a fluid flow passage therethrough opening into a part cylindrical end surface of the nozzle. A flow control member pivotable about an axis which is spaced from the axis of the end surface in a direction perpendicular both to the axis of the passage and the axis of the end surface has a part cylindrical control surface which is adjacent the end surface and of substantially the same radius.
Inventors
- 👤 Richard Woolliscroft Haigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:50
CPC Classifications
F; F15; F15C; F15C3/00; F15B; F15B5/00; F15B5/003; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/8659; Y10T137/86598; Y10T137/86847; Y10T137/877; Y10T137/87788; Y10T137/87812
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
125 words
A fluid flow control valve comprising a nozzle having an end surface on to which a fluid flow passage opens, said end surface being a part-cylindrical form with its axis transverse to the axis of the fluid flow passage, and a flow control member having a part-cylindrical surface portion of substantially the same radius as said end surface, said flow control member being mounted for movement about a pivotal axis lying within a cylindrical zone which is, in part, defined by said surface portion, said pivotal axis being in spaced, parallel relationship with the axis of said end surface and positioned so that the part-cylindrical portion of the flow control member can make substantially face to face contact with the end surface of the nozzle.
Claim 2
Dependent Claim
125 words
A fluid flow control valve comprising a nozzle having an end surface on to which a fluid flow passage opens, said end surface being a part-cylindrical form with its axis transverse to the axis of the fluid flow passage, and a flow control member having a part-cylindrical surface portion of substantially the same radius as said end surface, said flow control member being mounted for movement about a pivotal axis lying within a cylindrical zone which is, in part, defined by said surface portion, said pivotal axis being in spaced, parallel relationship with the axis of said end surface and positioned so that the part-cylindrical portion of the flow control member can make substantially face to face contact with the end surface of the nozzle.
Claim 3
Dependent Claim
47 words
The fluid control valve as claimed in claim 1 in which there are two co-axial nozzle directed towards one another, the end surfaces of the nozzles having a common axis and the flow control member having two part-cylindrical control surfaces coacting with said nozzle end surfaces respectively.
Claim 4
Dependent Claim
44 words
The fluid flow control valve as claimed in claim 2 in which the flow control member is cut away so that said part cylindrical control surfaces terminate in sharp edges immediately outside those zones thereof which are adjacent the end surfaces of the nozzles.
Claim 5
Dependent Claim
42 words
The fluid flow control valve as claimed in claim 2 in which the control surfaces of the flow control member are portions of a single cylindrical surface having a radius slightly smaller than the radius of the end surfaces of the nozzle.
Claim 6
Dependent Claim
63 words
A fluid pressure actuated servo-mechanism comprising a pump having its outlet connected via restrictors to the fluid flow passages of the two nozzles of a fluid flow control valve as claimed in claim 2, said fluid flow passages also being connected to a fluid pressure operable actuator, and a torque motor for varying the position of the flow control member of the valve.
Claim 7
Dependent Claim
53 words
The fluid flow control valve as claimed in claim 2 in which the part-cylindrical surfaces of the flow-control member have their axis spaced and parallel and lying on an arc struck from the pivot axis of the flow control member and passing through the common axis of the end surfaces of the nozzles.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |