US3894552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transducer nozzle
Assignee: Schneider Electric Systems USA Inc
•
Filing: 1974-01-31
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Granted: 1975-07-15
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Expires: 1994-01-31
Abstract
Abstract A nozzle for use in a pneumatic transducer of either the motion balance type or of the force balance type in which the useful nozzle output pressure is proportional to the mechanical position of a flapper with respect to the nozzle orifice. This nozzle utilizes an endless narrow slot orifice, such as an annular orifice, which provides an inner curtain and an outer curtain through which the fluid flows are regulated by the mechanical position of a single flapper to produce a useful output pressure signal. Various modes of operation of a transducer to introduce rate action using this nozzle are achieved by discharging the fluid from one curtain into auxiliary components. Rate mode is achieved by discharging the fluid from one curtain through a restrictor into a capacity chamber.
Inventors
- 👤 Hoel L Bowditch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:35
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/005; F15B; F15B5/00; F15B5/003; Y; Y10; Y10T; Y10T137/00; Y10T137/2278
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
156 words
A nozzle of the type having an outlet pressure chamber with a restricted inlet passage, an outlet signal passage and an outlet orifice arranged so that when constant pressure fluid is supplied through said restricted inlet passage to said outlet pressure chamber and discharges therefrom through said outlet orifice to ambient pressure, the outlet pressure signal in said inlet pressure chamber and outlet signal passage is a function of the distance the surface of a flapper is positioned from said outlet orifice, the improvement comprising: said outlet orifice in the form of a continuous slot whereby the fluid discharging from the outlet pressure chamber through said outlet orifice flows in one direction through an outer curtain to ambient pressure, and in the opposite direction through an inner curtain to ambient pressure and the rate of flow through both said curtains is simultaneously responsive to the position of said surface of said flapper from said outlet orifice.
Claim 2
Dependent Claim
156 words
A nozzle of the type having an outlet pressure chamber with a restricted inlet passage, an outlet signal passage and an outlet orifice arranged so that when constant pressure fluid is supplied through said restricted inlet passage to said outlet pressure chamber and discharges therefrom through said outlet orifice to ambient pressure, the outlet pressure signal in said inlet pressure chamber and outlet signal passage is a function of the distance the surface of a flapper is positioned from said outlet orifice, the improvement comprising: said outlet orifice in the form of a continuous slot whereby the fluid discharging from the outlet pressure chamber through said outlet orifice flows in one direction through an outer curtain to ambient pressure, and in the opposite direction through an inner curtain to ambient pressure and the rate of flow through both said curtains is simultaneously responsive to the position of said surface of said flapper from said outlet orifice.
Claim 3
Dependent Claim
17 words
A nozzle of the type claimed in claim 1 wherein said continuous slot is annular in form.
Claim 4
Dependent Claim
34 words
A nozzle of the type claimed in claim 1 wherein said nozzle includes: a vent whereby the flow of fluid discharged through said inner curtain is vented to an area external of said nozzle.
Claim 5
Dependent Claim
18 words
A nozzle of the type claimed in claim 3 wherein said vent is an orifice in said flapper.
Claim 6
Dependent Claim
25 words
A nozzle of the type claimed in claim 3 wherein said annular orifice comprises: a circular orifice, and a plug concentric with said circular orifice.
Claim 7
Dependent Claim
19 words
A nozzle of the type claimed in claim 5 wherein said vent is a longitudinal passage through said plug.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |