US3768432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shallow water adaptor for outboard motors
Assignee: Individual
•
Filing: 1971-10-18
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Granted: 1973-10-30
•
Expires: 1991-10-18
Abstract
Abstract A member adapted for coaction and operative association with an outboard motor and more specifically, the cavitation plate thereof whereby the boat with which the outboard motor is used may be operated in shallow bodies of water by the expedient of being able to aspirate ambient water to permit placement of the propeller of the outboard motor at a selected one of a plurality of positions wherein the propeller is capable of being positioned at various points with respect to the bottom of the boat so that in the normal state, the propeller is not fully positioned below the bottom of the boat. However, upon starting the outboard motor and turning on the propeller, water is aspirated to fully immerse the propeller and permit it to work against the aspirated flow of water to drive the boat through the shallow water even though part or all of the propeller may be located above the water surface generated by the hull bottom at planing speed.
Inventors
- 👤 E Spaulding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:23
CPC Classifications
B; B63; B63H; B63H5/00; B63H5/07; B63H5/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
178 words
Means for an outboard motor adapted to be mounted on the transom of a boat to permit operation in shallow water comprising the combination: a member adapted to be in at least partial encircling relationship to the propeller of said motor and having walls defining an inlet end of rectangular cross-section positioned on either side of or within a plane determined by the bottom of said boat and being adjacent one side of said propeller and being of relatively low profile to receive water and having rearwardly directed curvilinear, upwardly sweeping with respect to said inlet, walls to promote smooth water flow and defining an outlet end at least semi-circular in cross-section of higher profile and being adjacent the other side of said propeller to effect a directed, aspirated flow of water from said inlet end toward said outlet end, said walls defining said inlet end and said outlet end presenting an upper closed path through which said water is directed, and the upper extremity of said outlet end projects beyond the lower extremity of said outlet end.
Claim 2
Dependent Claim
178 words
Means for an outboard motor adapted to be mounted on the transom of a boat to permit operation in shallow water comprising the combination: a member adapted to be in at least partial encircling relationship to the propeller of said motor and having walls defining an inlet end of rectangular cross-section positioned on either side of or within a plane determined by the bottom of said boat and being adjacent one side of said propeller and being of relatively low profile to receive water and having rearwardly directed curvilinear, upwardly sweeping with respect to said inlet, walls to promote smooth water flow and defining an outlet end at least semi-circular in cross-section of higher profile and being adjacent the other side of said propeller to effect a directed, aspirated flow of water from said inlet end toward said outlet end, said walls defining said inlet end and said outlet end presenting an upper closed path through which said water is directed, and the upper extremity of said outlet end projects beyond the lower extremity of said outlet end.
Claim 3
Dependent Claim
29 words
The member is accordance with claim 1 wherein at least the outlet portion rearward of said propeller is provided with means to effect smooth, non-turbulent flow Of water therethrough.
Claim 4
Dependent Claim
23 words
The member in accordance with claim 2 wherein said means comprises fins or vanes on the interior wall of said outlet end portion.
Claim 5
Dependent Claim
25 words
The member in accordance with claim 3 wherein said outlet portion having said fins or vanes is separately demountable from the remainder of said member.
Claim 6
Dependent Claim
21 words
The member in accordance with claim 1 wherein it is adapted for securement to the cavitation plate of said outboard motor.
Claim 7
Dependent Claim
25 words
The member in accordance with claim 5 wherein the upper wall thereof is slotted to permit snug fitting engagement of said outboard motor shaft housing.
Claim 8
Dependent Claim
58 words
The member in accordance with claim 6 wherein the material of construction is moldable fiber glass and said member is bolted to said cavitation plate and the transom of said boat is upwardly extended to receive said outboard motor at one of a plurality of positions wherein said propeller is variously positioned with respect to the water surface.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |