Marine propulsion – Screw propeller – Shafting
Patent
1988-05-23
1989-09-26
Peters, Jr., Joseph F.
Marine propulsion
Screw propeller
Shafting
285392, 403370, 403299, 403 16, 411178, F16L 3500
Patent
active
048696943
ABSTRACT:
A marine drive (1) for a boat (3) includes a longitudinally extending propeller shaft (18, 20) which concentrically carries the hub (21, 22) of a propeller (10, 11) at the aft end of the shaft, with the shaft serving to rotatably drive the hub. The shaft is provided with a threaded outer peripheral portion (48, 36) at its end. The hub is provided with a rearwardly disposed annular flange (44, 32) and an annular rearwardly facing recess (45, 33) having a threaded outer periphery (47, 35). A dual-threaded nut (49, 37) is removably disposed within the hub recess. The outer nut threads engage the hub threads, while the inner nut threads engage the threads of the propeller shaft. A device (56, 43) is provided for securing the nut against threadable rotation in its mounting. The inventive concepts may be utilized with a single or dual propeller system or any other hub and shaft connection.
REFERENCES:
patent: 1948110 (1934-02-01), Hobler
patent: 2438744 (1948-03-01), Flynn
patent: 2549484 (1951-04-01), Kiekhaefer
patent: 2630775 (1953-03-01), Kiekhaefer
patent: 3587510 (1971-06-01), Shimanckas
patent: 4317655 (1982-03-01), Schiek
patent: 4655479 (1987-04-01), Farr
Bartz Clifford T.
Brunswick Corporation
Peters Jr. Joseph F.
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