Patent US3756946A successfully refreshed from Google Patents.
Patent US3732033A successfully refreshed from Google Patents.
US3732033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boat propeller lock
Assignee: Individual
•
Filing: 1972-01-03
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Granted: 1973-05-08
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Expires: 1992-01-03
Abstract
Abstract Disclosed is an enclosure which can be locked in position to conceal a nut used to secure a boat propeller to a drive shaft. The enclosure includes a cover portion that can be locked into engagement with a base portion that is retained by and specially accommodates the nut. Both the enclosure and the lock mechanism therefore are formed of an oxidation resistant material so as to prevent deterioration during use in a water environment.
Inventors
- 👤 J Macchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:51
CPC Classifications
B; B63; B63H; B63H1/00; B63H1/02; B63H1/12; B63H1/14; B63H1/20; F; F16; F16B; F16B2200/00; F16B2200/69; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5611; Y10T70/5854; Y10T70/5867
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
83 words
Boat apparatus comprising in combination: securing means for securing a propeller on a drive shaft of a boat engine; enclosure means for enclosing said securing means so as to prevent access thereto, said enclosure means comprIsing a cover portion demountable to provide access to said securing means; lock means coupled to said enclosure means and actuatable between an open position that allows demounting of said enclosure means and a locked position that prevents demounting thereof; and key means for actuating said lock means.
Claim 2
Dependent Claim
83 words
Boat apparatus comprising in combination: securing means for securing a propeller on a drive shaft of a boat engine; enclosure means for enclosing said securing means so as to prevent access thereto, said enclosure means comprIsing a cover portion demountable to provide access to said securing means; lock means coupled to said enclosure means and actuatable between an open position that allows demounting of said enclosure means and a locked position that prevents demounting thereof; and key means for actuating said lock means.
Claim 3
Dependent Claim
40 words
Boat apparatus according to claim 1 wherein said enclosure means further comprises a base portion means also secured to the drive shaft by said securing means, said base portion accommodating said cover portion and securable thereto by said lock means.
Claim 4
Dependent Claim
20 words
Boat apparatus according to claim 2 wherein said securing means comprises a threaded nut for engaging threads on the shaft.
Claim 5
Dependent Claim
24 words
Boat apparatus according to claim 3 wherein said securing means further comprises anti-rotation means for preventing rotation of said nut on the drive shaft.
Claim 6
Dependent Claim
28 words
Boat apparatus according to claim 3 wherein said base portion means comprises a substantially flat bearing surface for forcibly engaging an accommodating bearing surface on said securing means.
Claim 7
Dependent Claim
51 words
Boat apparatus according to claim 5 wherein said base portion means comprises an annular member having a mounting aperture encircled by said bearing surface and adapted to receive the drive shaft, said annular member having a rear bearing surface for forcibly engaging an accommodating surface on a hub of the propeller.
Claim 8
Dependent Claim
21 words
Boat apparatus according to claim 6 wherein said enclosure means and said lock means are composed of an oxidation resistant material.
Claim 9
Dependent Claim
17 words
Boat apparatus according to claim 3 wherein said base portion is an integral part of the propeller.
Claim 10
Dependent Claim
21 words
Boat apparatus according to claim 8 wherein said enclosure means and said lock means are composed of an oxidation resistant material.
Claim 11
Dependent Claim
28 words
Boat apparatus according to claim 9 wherein said base portion means comprises a substantially flat bearing surface for forcibly engaging an accommodating bearing surface on said securing means.
Claim 12
Dependent Claim
21 words
Boat apparatus according to claim 1 wherein said enclosure means and said lock means are composed of an oxidation resistant material.
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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |