US3641964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water jet propulsion unit
Assignee: Individual
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Filing: 1969-10-20
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Granted: 1972-02-15
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Expires: 1989-10-20
Abstract
Abstract A propulsion unit for a boat hull of the type including a transom and an engine disposed forwardly of the transom and provided with a rearwardly facing output shaft spaced above the lower marginal edge portion of the transom. A hollow elongated housing is provided and supported from the lower marginal edge portion of the transom in rearwardly projecting position and the housing has a longitudinal impeller shaft journaled therein whose forward end projects forwardly through the transom. The forward end of the housing is provided with a downwardly opening outlet immediately rearward of the lower marginal edge portion of the transom and an offset drive train assembly is provided forwardly of the transom and drivingly connects the elevated engine output shaft to the lower forward end of the impeller shaft.
Inventors
- 👤 Robert B Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:27
CPC Classifications
B; B63; B63H; B63H11/00; B63H11/02; B63H11/10; B63H11/107; B63H11/113
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
161 words
In combination with a boat hull of the type including a bottom from whose rear end a transom projects upwardly and from which an upper powered drive shaft is journaled forwardly of the transom at an upper elevated position relative to the bottom, a hollow elongated housing supported in rearwardly projecting position from the lower marginal portion of said transom, a lower longitudinal impeller shaft journaled in said housing and including a forward end projecting through said transom at an elevation below said drive shaft, the rear end of said housing being open, the forward end of said housing including a downwardly opening inlet opening outwardly immediately rearward of the lower marginal portion of said transom, an impeller member mounted on said impeller shaft for rotation therewith intermediate said inlet and the open rear end of said housing, and drive train means disposed forward of said transom wholly within said boat hull drivingly connecting said drive shaft to said impeller shaft.
Claim 2
Dependent Claim
161 words
In combination with a boat hull of the type including a bottom from whose rear end a transom projects upwardly and from which an upper powered drive shaft is journaled forwardly of the transom at an upper elevated position relative to the bottom, a hollow elongated housing supported in rearwardly projecting position from the lower marginal portion of said transom, a lower longitudinal impeller shaft journaled in said housing and including a forward end projecting through said transom at an elevation below said drive shaft, the rear end of said housing being open, the forward end of said housing including a downwardly opening inlet opening outwardly immediately rearward of the lower marginal portion of said transom, an impeller member mounted on said impeller shaft for rotation therewith intermediate said inlet and the open rear end of said housing, and drive train means disposed forward of said transom wholly within said boat hull drivingly connecting said drive shaft to said impeller shaft.
Claim 3
Dependent Claim
97 words
The combination of claim 1 wherein said drive train means includes an upstanding housing supported from the inner side of said transom from whose upper portion said drive shaft is journaled and including spaced front and rear walls from which longitudinally spaced portions of said forward end portions are journaled, and a pair of aligned drive wheels mounted on said drive and impeller shafts within said upstanding housing and including drive means drivingly connecting the output shaft wheel to the impeller shaft wheel, said impeller shaft being free of associated journal means rearward of said impeller member.
Claim 4
Dependent Claim
39 words
The combination of claim 2 wherein said housing includes a lower end portion defining a sump, and lubricating fluid disposed in said sump at least to a level below which the lower periphery of the lower sprocket wheel projects.
Claim 5
Dependent Claim
36 words
The combination of claim 1 including a larger diameter outer sleeve telescoped over the rear end of said housing and supported therefrom for oscillation about a vertical axis closely adjacent the rear end of said housing.
Claim 6
Dependent Claim
28 words
The combination of claim 4 including remotely operable control means operatively connected between said hull and said sleeve for adjustably angularly displacing said sleeve relative to said housing.
Claim 7
Dependent Claim
28 words
The combination of claim 1 wherein said inlet opens downwardly through a plane substantially coinciding with the under surface portions of said bottom immediately forward of said inlet.
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) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |