CA1095337A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Marine propulsion device including propeller protection means
Assignee: Outboard Marine Corp
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Filing: 1979-11-20
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Granted: 1981-02-10
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Expires: 1999-11-20
Abstract
Abstract Disclosed herein is a marine propulsion device including a lower unit having a gear case, a laterally extending anti-cavitation plate extending above a propeller carried on a propeller shaft rotatably mounted in the gear case, and a pair of generally flat side fins, each of which has a laterally extending trailing edge located wholly forwardly of the propeller and which either extend laterally in coplanar relationship from the opposite sides of the gear case, extend laterally in coplanar relationship from the opposite sides of the lower unit at a location between the anti-cavitation plate and the gear case, extend outwardly and downwardly in an angular relationship from the opposite sides of the gear case, or extend laterally in coplanar relationship from the opposite sides of the lower end portion of a vertical fin extending downwardly from the gear case.
Inventors
- 👤 Ralph S. Evinrude
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-06 17:18
CPC Classifications
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Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
96 words
A marine propulsion device comprising a lower unit including a gear case normally submerged in water, a propeller shaft mounted in said gear case for rotation about an axis and carrying a propeller, a laterally extending anti-cavitation plate extending above said propeller, and a pair of generally flat, horizontally extending said fins affixed on and extending laterally in substantially coplanar relation-ship from the opposite sides of said lower unit at a location between said gear case and said anti-cavitation plate, each of said fins having a laterally extending trailing edge located wholly forwardly of said propeller.
Claim 2
Dependent Claim
96 words
A marine propulsion device comprising a lower unit including a gear case normally submerged in water, a propeller shaft mounted in said gear case for rotation about an axis and carrying a propeller, a laterally extending anti-cavitation plate extending above said propeller, and a pair of generally flat, horizontally extending said fins affixed on and extending laterally in substantially coplanar relation-ship from the opposite sides of said lower unit at a location between said gear case and said anti-cavitation plate, each of said fins having a laterally extending trailing edge located wholly forwardly of said propeller.
Claim 3
Dependent Claim
65 words
A marine propulsion device according to Claim 1 wherein said gear case has a forward end, and wherein each of said side fins includes a generally straight outermost edge extending forwardly from said trailing edge and generally parallel to said propeller shaft axis, and a leading edge extending at an incline outwardly and rearwardly from adjacent said gear case forward end toward said outermost edge.
Claim 4
Dependent Claim
23 words
A marine propulsion device according to Claim 2 wherein said leading edge includes a convexly curved portion smoothly merging with said outermost edge.
Claim 5
Dependent Claim
30 words
A marine propulsion device according to Claim 2 wherein said outermost edges of said side fins extend laterally to a location generally corresponding to the peripheral path of said propeller.
Claim 6
Dependent Claim
120 words
A marine propulsion device comprising a lower unit including a gear case normally submerged in water, a propeller shaft mounted in said gear case for rotation about an axis and carrying a propeller, a laterally extending anti-cavitation plate extending above said propeller, and a pair of generally flat, horizontally extending side fins affixed on and extending laterally in substantially coplanar relation-ship from the opposite sides of said lower unit at a location on said lower unit above said gear case and beneath said anti-cavitation plate, and within an imaginary extension parallel to said propeller axis of the periphery of the path of propeller rotation, each of said fins having a laterally extending trailing edge located wholly forwardly of said propeller.
Claim 7
Dependent Claim
120 words
A marine propulsion device comprising a lower unit including a gear case normally submerged in water, a propeller shaft mounted in said gear case for rotation about an axis and carrying a propeller, a laterally extending anti-cavitation plate extending above said propeller, and a pair of generally flat, horizontally extending side fins affixed on and extending laterally in substantially coplanar relation-ship from the opposite sides of said lower unit at a location on said lower unit above said gear case and beneath said anti-cavitation plate, and within an imaginary extension parallel to said propeller axis of the periphery of the path of propeller rotation, each of said fins having a laterally extending trailing edge located wholly forwardly of said propeller.
Claim 8
Dependent Claim
65 words
A marine propulsion device according to Claim 5 wherein said gear case has a forward end, and wherein each of said side fins includes a generally straight outermost edge extending forwardly from said trailing edge and generally parallel to said propeller shaft axis, and a leading edge extending at an incline outwardly and rearwardly from adjacent said gear case forward end toward said outermost edge.
Claim 9
Dependent Claim
23 words
A marine propulsion device according to Claim 6 wherein said leading edge includes a convexly curved portion smoothly merging with said outermost edge.
Claim 10
Dependent Claim
30 words
A marine propulsion device according to Claim 6 wherein said outermost edges of said side fins extend laterally to a location generally corresponding to the peripheral path of said propeller.
References Cited (Backward Citations)
No citation records indexed.
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