US3924557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller mechanism for boats
Assignee: Individual
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Filing: 1974-12-16
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Granted: 1975-12-09
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Expires: 1994-12-16
Abstract
Abstract An improved propelling mechanism for boats powered with inboard motors. The device consists of two shafts attached to gear mechanisms which are enclosed in cowlings mounted opposite each other on the hull of a boat above the waterline. To the ends of the shafts propellers are mounted. Supports are provided attached to the splash board which also supports two rudders mounted behind the propellers. The gear mechanisms are connected to a motor centrally located inside the boat.
Inventors
- 👤 David R Bloch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:37
CPC Classifications
B; B63; B63H; B63H5/00; B63H5/07; B63H5/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
216 words
An improved propeller drive and rudder mechanism for boats comprising in combination; a boat hull having an opening disposed on each side thereof positioned above the waterline; an inboard motor means having a pair of drive shafts extending outwardly therefrom and received within each of said openings in said boat hull; a watertight housing mounted over each of said openings; a shaft drive means operably disposed within each of sAid housings and connected to respective motor drive shafts; a pair of propeller shafts positioned along the outer sides of said hull wherein one end thereof is connected to said shaft drive means whereby said motor means operates said propeller shafts; a propeller means located at one end of each propeller shaft; a support member secured to said hull above the waterline thereof and positioned along the rear and sides of said hull extending forwardly to said housing whereby said propeller shaft is disposed thereunder; bearing means attached to said support member and arranged to operably receive respective propeller shafts therethrough; rudder means positioned to the rear of said propeller means in alignment therewith and attached to said support member; and a steering mechanism operably mounted within said hull and operably interconnected to each of said rudder means whereby the movement of said rudders is controlled thereby.
Claim 2
Dependent Claim
216 words
An improved propeller drive and rudder mechanism for boats comprising in combination; a boat hull having an opening disposed on each side thereof positioned above the waterline; an inboard motor means having a pair of drive shafts extending outwardly therefrom and received within each of said openings in said boat hull; a watertight housing mounted over each of said openings; a shaft drive means operably disposed within each of sAid housings and connected to respective motor drive shafts; a pair of propeller shafts positioned along the outer sides of said hull wherein one end thereof is connected to said shaft drive means whereby said motor means operates said propeller shafts; a propeller means located at one end of each propeller shaft; a support member secured to said hull above the waterline thereof and positioned along the rear and sides of said hull extending forwardly to said housing whereby said propeller shaft is disposed thereunder; bearing means attached to said support member and arranged to operably receive respective propeller shafts therethrough; rudder means positioned to the rear of said propeller means in alignment therewith and attached to said support member; and a steering mechanism operably mounted within said hull and operably interconnected to each of said rudder means whereby the movement of said rudders is controlled thereby.
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) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |