Blocking device for preventing axial movement in selected extent

Details Blocking device for preventing axial movement in selected extent Blocking device for preventing axial movement in selected extent

1982-05-18

1985-02-12

Blix, Trygve M.

Marine propulsion

Screw propeller

Shafting

285305, B63H 2334

Patent

active

044988745

ABSTRACT:
A boat propeller device including an inner hub wall defining an opening for a shaft and having an outer circumferential groove, a partly flexible, elongated and unitary plastic locking member partially located in the outer groove. The shaft has an inner circumferential groove in its surface for partially receiving the locking member therein. An access port enables introduction of the locking member into an inner channel defined by the inner and outer grooves in juxtaposed position. The locking member includes spaced indentations for increasing the flexibility thereof; the oppositely disposed indentations forming reduced cross-sections thereof and defining flexible bridges, and between each two adjacent indentations rigid link members are formed and are of a trapezoid-shape cross-section. One of the terminal link members is releasably affixed to the hub and spline connection blocks rotational movement between the hub and shaft. The propeller may be mounted for push or traction on the hub and is axially moveable to a limited extent to unblock an auxiliary exhaust port when the propeller is in position for rearward drive.

REFERENCES:
patent: 2064195 (1936-12-01), Michelis
patent: 2403368 (1946-07-01), Howard
patent: 3142498 (1964-07-01), Press
patent: 3239244 (1966-03-01), Leinfelt
patent: 3606402 (1971-09-01), Medney
patent: 3952686 (1976-04-01), Pichl
patent: 4052091 (1977-10-01), Bowden
patent: 4293148 (1981-10-01), Milberger

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