US4852800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for stablizing flow to sharp edges orifices
Assignee: Flow International Corp
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Filing: 1985-06-17
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Granted: 1989-08-01
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Expires: 2005-06-17
Abstract
Abstract A method and apparatus for stablizing flow to sharp edged orifices by placing a convergent section upstream of the orifice.
Inventors
- 👤 G. Duncan Murdock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:35
CPC Classifications
B; B05; B05B; B05B1/00; B05B1/02; B05B1/10; B26; B26F; B26F3/00; B26F3/004; E; E21; E21B; E21B7/00; E21B7/18
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
64 words
An improved fluid jet cutting nozzle of the type utilizing a jeweled orifice downstream of a collimating chamber, the improvement comprising: a convergent cone upstream of the jeweled orifice adjacent thereto for collimating the fluid flow to said orifice, the minimum diameter of the cone being larger than the diameter of the orifice; and, means for mounting said convergent cone in said collimating chamber.
Claim 2
Dependent Claim
64 words
An improved fluid jet cutting nozzle of the type utilizing a jeweled orifice downstream of a collimating chamber, the improvement comprising: a convergent cone upstream of the jeweled orifice adjacent thereto for collimating the fluid flow to said orifice, the minimum diameter of the cone being larger than the diameter of the orifice; and, means for mounting said convergent cone in said collimating chamber.
Claim 3
Dependent Claim
26 words
A nozzle as in claim 1 wherein the diameter of the downstream end of said convergent cone is larger than the diameter of the jewel orifice.
Claim 4
Dependent Claim
23 words
A nozzle as in claim 2 wherein the length of said cone is at least 1/2 of the length of said collimating chamber.
Claim 5
Independent Claim
74 words
A method for controlling turbulence upstream of a jewel cutting orifice in a fluid jet cutting tool comprising the steps of: producing a stream of high pressure fluid; passing said stream through a convergent cone section to remove turbulence; and, passing said converged stream through a jewel orifice adjacent the convergent cone section which has a diameter less than the minimum diameter of the convergent cone section to produce a coherent fluid cutting jet.
Claim 6
Independent Claim
74 words
A method for controlling turbulence upstream of a jewel cutting orifice in a fluid jet cutting tool comprising the steps of: producing a stream of high pressure fluid; passing said stream through a convergent cone section to remove turbulence; and, passing said converged stream through a jewel orifice adjacent the convergent cone section which has a diameter less than the minimum diameter of the convergent cone section to produce a coherent fluid cutting jet.
Claim 7
Dependent Claim
20 words
A method as in claim 4 further comprising the step of forcing said converged stream to pass a sharp step.
Claim 8
Independent Claim
61 words
A method for increasing the coherent length of a fluid jet emerging from the jewel orifice of a fluid jet cutting tool, comprising the steps of: producing a stream of high pressure fluid; and, passing said stream through a convergent cone section adjacent the orifice, the minimum diameter of the convergent cone section being greater than the diameter of said orifice.
Claim 9
Independent Claim
61 words
A method for increasing the coherent length of a fluid jet emerging from the jewel orifice of a fluid jet cutting tool, comprising the steps of: producing a stream of high pressure fluid; and, passing said stream through a convergent cone section adjacent the orifice, the minimum diameter of the convergent cone section being greater than the diameter of said orifice.
Claim 10
Dependent Claim
83 words
An improved fluid jet cutting nozzle of the type utilizing a jeweled orifice downstream of a collimating chamber, the improvement comprising: a convergent cone upstream of the jewel orifice for collimating the fluid flow to said orifice, the minimum diameter of the downstream end of the convergent cone being larger than the diameter of the orifice, the length of said cone being at least 1/2 of the length of said collimating chamber; and means for mounting said convergent cone in said collimating chamber.
Claim 11
Dependent Claim
83 words
An improved fluid jet cutting nozzle of the type utilizing a jeweled orifice downstream of a collimating chamber, the improvement comprising: a convergent cone upstream of the jewel orifice for collimating the fluid flow to said orifice, the minimum diameter of the downstream end of the convergent cone being larger than the diameter of the orifice, the length of said cone being at least 1/2 of the length of said collimating chamber; and means for mounting said convergent cone in said collimating chamber.
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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) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |