US3712341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anticavitation device
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1971-01-19
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Granted: 1973-01-23
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Expires: 1991-01-19
Abstract
Abstract A flow separator is placed along the axis of a vertical duct and has a radial enlargement which is in contact with the internal duct wall. The duct is thus separated into a lower region and an upper region in which are located orifices for the admission of liquid under pressure. The radial enlargement is provided with an upward tubular extension which is so shaped internally as to form a highly progressive convergent-divergent nozzle while defining externally with the duct wall an annular space having at least one section which is partially throttled by a transverse diaphragm, said diaphragm being rigidly fixed to said tubular extension.
Inventors
- 👤 J Constantin
- 👤 J Duquesne
- 👤 M Pontier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:50
CPC Classifications
F; F15; F15D; F15D1/00; F15D1/02; G; G21; G21C; G21C1/00; G21C1/02; G21C3/00; G21C3/30; G21C3/32; G21C3/322; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
124 words
An anticavitation device comprising a duct having a plurality of orifices for admitting a liquid under pressure into said duct, a flow-separating component having an annular enlargement circumferentially secured to the internal wall of the duct so as to separate said duct into a lower region and an upper region in which the orifices for the admission of the liquid are located, said enlargement having an axial extension in the upper region in the form of a tubular casing having internally the shape of a convergent-divergent nozzle with very progressive inlet and outlet profiles, said tubular casing defining an annular space with the duct wall and having a transverse diaphragm rigidly fixed to said tubular casing for throttling the flow in said annular space.
Claim 2
Dependent Claim
124 words
An anticavitation device comprising a duct having a plurality of orifices for admitting a liquid under pressure into said duct, a flow-separating component having an annular enlargement circumferentially secured to the internal wall of the duct so as to separate said duct into a lower region and an upper region in which the orifices for the admission of the liquid are located, said enlargement having an axial extension in the upper region in the form of a tubular casing having internally the shape of a convergent-divergent nozzle with very progressive inlet and outlet profiles, said tubular casing defining an annular space with the duct wall and having a transverse diaphragm rigidly fixed to said tubular casing for throttling the flow in said annular space.
Claim 3
Dependent Claim
41 words
An anticavitation device according to claim 1, wherein the tubular casing includes a cylindrical extension having a wall which is parallel to the duct, the transverse diaphragm being placed at the point of junction of said casing and said cylindrical extension.
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |