Patent US4844848A successfully refreshed from Google Patents.
Patent US3552348A successfully refreshed from Google Patents.
US3552348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine propulsion drive
Assignee: Individual
•
Filing: 1969-04-23
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Granted: 1971-01-05
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Expires: 1989-04-23
Abstract
Abstract A simple steering gear wherein a cylindrical member, into which a propeller shaft is slidably inserted, is connected to a rod in such a manner that the movement of the rod is transmitted to the member to move it. The member is provided with long holes having teeth, each of which being engaged with a blade at the teeth so as to rotate the blade in accordance with the movement of the member.
Inventors
- 👤 Kiyoshi Shima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:31
CPC Classifications
B; B63; B63H; B63H25/00; B63H25/42; B63H3/00; B63H3/02; B63H3/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
164 words
A marine propulsion drive comprising in combination with a rudder member having a chamber formed therein, a cylindrical shaft extending at one end into said chamber, said shaft being connected to the driving means, a propeller shaft rotatably mounted in said rudder member and extending into said chamber, a gear assembly arranged in said chamber and engaging said cylindrical shaft and propeller shaft, a tubular member having long holes penetrating through the peripheral wall thereof, the inner wall of each hole having teeth arranged in parallel to the axis of said propeller shaft, said propeller shaft being slidably inserted through said tubular member, a plurality of blades rotatably supported to the propeller shaft and having teeth engaged with said teeth of each long hole, a rod penetrating through said cylindrical shaft and extending into said chamber, and an arm connected between said rod and tubular member, movement of said rod causing sliding of said tubular member whereby said blades rotate changing the pitch thereof.
Claim 2
Dependent Claim
164 words
A marine propulsion drive comprising in combination with a rudder member having a chamber formed therein, a cylindrical shaft extending at one end into said chamber, said shaft being connected to the driving means, a propeller shaft rotatably mounted in said rudder member and extending into said chamber, a gear assembly arranged in said chamber and engaging said cylindrical shaft and propeller shaft, a tubular member having long holes penetrating through the peripheral wall thereof, the inner wall of each hole having teeth arranged in parallel to the axis of said propeller shaft, said propeller shaft being slidably inserted through said tubular member, a plurality of blades rotatably supported to the propeller shaft and having teeth engaged with said teeth of each long hole, a rod penetrating through said cylindrical shaft and extending into said chamber, and an arm connected between said rod and tubular member, movement of said rod causing sliding of said tubular member whereby said blades rotate changing the pitch thereof.
Claim 3
Dependent Claim
50 words
A marine propulsion drive according to claim 1 wherein said rod has threads formed on the peripheral surface thereof, said threads being engaged with the inner surface of a worm wheel which is connected to an adjusting shaft through a worm gear to move said rod along the axis thereof.
Claim 4
Dependent Claim
32 words
A marine propulsion drive according to claim 1 wherein a cap member is mounted at the protruded end of said propeller shaft, said blades penetrating through the wall of said cap member.
References Cited (Backward Citations)
US1780075A
Cited
US1917610A
Cited
US2308749A
Cited
US2545502A
Cited
US2495453A
Cited
US3266454A
Cited
US3310118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |