US4373919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-passage variable diffuser inlet
Assignee: Boeing North American Inc
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Filing: 1980-11-17
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Granted: 1983-02-15
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Expires: 2000-11-17
Abstract
Abstract A variable inlet for a marine jet propulsion system comprising a movable lip, a center splitter serving to divide said inlet into upper and lower passages and coupled for movement proportional to that of said lip to assure equality of the areas of said upper and lower passages, and apparatus for varying the outward projection of said splitter to vary the diffusion ratio of said upper and lower passages.
Inventors
- 👤 Maynard L. Stangeland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:17
CPC Classifications
B; B63; B63H; B63H11/00; B63H11/02; B63H11/04; Y; Y10; Y10T; Y10T137/00; Y10T137/0536
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
An inlet for a marine jet propulsion system comprising: a lip member having one end thereof pivotally connected to the hull of a vessel; a center splitter serving to divide said inlet into upper and lower passages; positioning means for moving said splitter in a manner proportional to the movement of said lip to assure equality of the areas and diffusion of said upper and lower passages; and means for varying the outward projection of said splitter to vary the inlet velocity recovery of said upper and lower passages.
Claim 2
Dependent Claim
89 words
An inlet for a marine jet propulsion system comprising: a lip member having one end thereof pivotally connected to the hull of a vessel; a center splitter serving to divide said inlet into upper and lower passages; positioning means for moving said splitter in a manner proportional to the movement of said lip to assure equality of the areas and diffusion of said upper and lower passages; and means for varying the outward projection of said splitter to vary the inlet velocity recovery of said upper and lower passages.
Claim 3
Dependent Claim
96 words
An inlet for a marine jet propulsion system comprising: a lip member having one end thereof pivotally connected to the hull of a vessel; a center splitter serving to divide said inlet into upper and lower passages; positioning means comprising a rocker arm and scissors linkage for moving said splitter in a manner proportional to the movement of said lip to assure equality of the areas and diffusion of said upper and lower passages; and means for varying the outward projection of said splitter to vary the inlet velocity recovery of said upper and lower passages.
Claim 4
Dependent Claim
96 words
An inlet for a marine jet propulsion system comprising: a lip member having one end thereof pivotally connected to the hull of a vessel; a center splitter serving to divide said inlet into upper and lower passages; positioning means comprising a rocker arm and scissors linkage for moving said splitter in a manner proportional to the movement of said lip to assure equality of the areas and diffusion of said upper and lower passages; and means for varying the outward projection of said splitter to vary the inlet velocity recovery of said upper and lower passages.
Claim 5
Dependent Claim
37 words
The inlet of claim 1 or 2 wherein the last-named means comprises a longitudinal slot formed in the inboard end of said splitter, and a pin extending through said slot to secure said splitter to said vessel.
Claim 6
Dependent Claim
27 words
The inlet of claim 1 or 2 further comprising vertical splitter means extending across said inlet serving to laterally divide said inlet and housing said positioning means.
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) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |