US5716248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sacrificial anode for marine propulsion unit
Assignee: Yamaha Marine Co Ltd
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Filing: 1995-08-03
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Granted: 1998-02-10
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Expires: 2015-08-03
Abstract
Abstract Sacrificial anode arrangements for marine propulsion units wherein the sacrificial anode is juxtaposed to the trim tab and is detachably connected to the lower unit housing by fastening means which can be removed from the upper surface thereof. In one embodiment, the trim tab is detachably connected to the sacrificial anode is connected to the outer housing portion through the sacrificial anode.
Inventors
- 👤 Daisuke Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:27
CPC Classifications
B; B63; B63H; B63H20/00; B63H20/32; B63B; B63B59/00; B63H20/34
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
69 words
A lower unit and sacrificial anode arrangement for a marine propulsion unit having an outer housing portion for operating below the water level, said outer housing portion providing a trim tab depending therefrom, a sacrificial anode juxtaposed to said trim tab, and threaded fastening means accessible from the area of said outer housing portion above said trim tab for detachably connecting said sacrificial anode to said outer housing portion.
Claim 2
Dependent Claim
69 words
A lower unit and sacrificial anode arrangement for a marine propulsion unit having an outer housing portion for operating below the water level, said outer housing portion providing a trim tab depending therefrom, a sacrificial anode juxtaposed to said trim tab, and threaded fastening means accessible from the area of said outer housing portion above said trim tab for detachably connecting said sacrificial anode to said outer housing portion.
Claim 3
Dependent Claim
39 words
A lower unit and sacrificial anode arrangement for a marine propulsion unit as set forth in claim 1, wherein the threaded fastening means extends about a generally vertically extending axis in the normal position of the marine propulsion unit.
Claim 4
Dependent Claim
33 words
A lower unit and sacrificial anode arrangement for a marine propulsion unit as set forth in claim 2, wherein the threaded fastening means has a head portion disposed at the upper end thereof.
Claim 5
Dependent Claim
54 words
A lower unit and sacrificial anode arrangement for a marine propulsion unit as set forth in claim 3, wherein the outer housing portion is formed with a recess in which the threaded fastening means is contained so that the threaded fastening means is not exposed to the water flowing past the outer housing portion.
Claim 6
Dependent Claim
69 words
A lower unit and sacrificial anode arrangement for a marine propulsion unit as set forth in claim 4, wherein the recess of the outer housing portion is bounded on its upper surface by an opening formed in an upper wall of the outer housing portion and further including a removable closure plug for removably closing said opening and by which the threaded means may be accessed upon removal thereof.
Claim 7
Dependent Claim
35 words
A lower unit and sacrificial anode arrangement for a marine propulsion unit as set forth in claim 1, wherein the sacrificial anode is detachably connected to the outer housing portion independently of the trim tab.
Claim 8
Dependent Claim
39 words
A lower unit and sacrificial anode arrangement for a marine propulsion unit as set forth in claim 6, wherein the threaded fastening means extends about a generally vertically extending axis in the normal position of the marine propulsion unit.
Claim 9
Dependent Claim
33 words
A lower unit and sacrificial anode arrangement for a marine propulsion unit as set forth in claim 7, wherein the threaded fastening means has a head portion disposed at the upper end thereof.
Claim 10
Dependent Claim
54 words
A lower unit and sacrificial anode arrangement for a marine propulsion unit as set forth in claim 8, wherein the outer housing portion is formed with a recess in which the threaded fastening means is contained so that the threaded fastening means is not exposed to the water flowing past the outer housing portion.
Claim 11
Dependent Claim
69 words
A lower unit and sacrificial anode arrangement for a marine propulsion unit as set forth in claim 9, wherein the recess of the outer housing portion is bounded on its upper surface by an opening formed in an upper wall of the outer housing portion and further including a removable closure plug for removably closing said opening and by which the threaded means may be accessed upon removal thereof.
Claim 12
Dependent Claim
52 words
A lower unit and sacrificial anode arrangement for a marine propulsion unit as set forth in claim 1, wherein the trim tab is detachably connected to the sacrificial anode and is affixed to the outer housing portion by the threaded fastening means that affix the sacrificial anode to the outer housing portion.
Claim 13
Dependent Claim
32 words
A lower unit and sacrificial anode arrangement for a marine propulsion unit as set forth in claim 11, wherein the trim tab is formed by a piece separate from the sacrificial anode.
Claim 14
Dependent Claim
54 words
A lower unit and sacrificial anode arrangement for a marine propulsion unit as set forth in claim 12, wherein the threaded fastening means that affix the trim tab to the sacrificial anode are disposed outside of the water stream and within a recess in the outer housing portion into which the sacrificial anode extends.
Claim 15
Dependent Claim
39 words
A lower unit and sacrificial anode arrangement for a marine propulsion unit as set forth in claim 13, wherein the threaded fastening means extends about a generally vertically extending axis in the normal position of the marine propulsion unit.
Claim 16
Dependent Claim
33 words
A lower unit and sacrificial anode arrangement for a marine propulsion unit as set forth in claim 14, wherein the threaded fastening means has a head portion disposed at the upper end thereof.
Claim 17
Dependent Claim
54 words
A lower unit and sacrificial anode arrangement for a marine propulsion unit as set forth in claim 15, wherein the outer housing portion is formed with a recess in which the threaded fastening means is contained so that the threaded fastening means is not exposed to the water flowing past the outer housing portion.
Claim 18
Dependent Claim
69 words
A lower unit and sacrificial anode arrangement for a marine propulsion unit as set forth in claim 15, wherein the recess of the outer housing portion is bounded on its upper surface by an opening formed in an upper wall of the outer housing portion and further including a removable closure plug for removably closing said opening and by which the threaded means may be accessed upon removal thereof.
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) | 2001-02-09 | 2001-08-11 | 2002-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-02-09 | 2005-08-11 | 2006-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-02-09 | 2009-08-11 | 2010-02-10 | $7700.00 | Window Closed / Lapsed |