Hydraulically actuated two-speed transmission for a marine propu

Marine propulsion – Screw propeller – Having transmission

Patent

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Details

74336R, 74368, 440900, B63H 2126

Patent

active

043314325

ABSTRACT:
Disclosed herein is a marine propulsion device including an input shaft drivingly connected to a power source, a lower unit having a rotatably mounted drive shaft extending in coaxial relation to the input shaft, a rotatably mounted propeller shaft carrying a propeller and drivingly connected to the propeller shaft, and a two-speed transmission drivingly connecting the input shaft to the drive shaft. The transmission includes a third shaft rotatably mounted in parallel relation to the input shaft and the drive shaft, a first pair of meshing gears including a first drive gear mounted on the input shaft and a first driven gear mounted on the third shaft, a second pair of meshing gears including a second drive gear mounted on the third shaft and a second driven gear mounted on the drive shaft, and a one-way overrunning clutch drivingly connecting one of the shafts to a gear mounted on the shaft when the rotational speed of the input shaft is less than a predetermined value. The transmission also includes a fluid pressure actuated selectively actuatable clutch for drivingly connecting the input shaft and the drive shaft when the rotational speed of the input shaft is greater than a first value. The transmission includes a housing and a pair of the meshing gears are disposed in the housing to form a fluid pump for providing fluid to the fluid pressure actuated clutch, the fluid pump developing fluid pressure which increases as the rotational speed of the gears increases.

REFERENCES:
patent: 1795135 (1931-03-01), Molly
patent: 2219812 (1940-10-01), Hochstetter
patent: 2785582 (1957-03-01), Banker
patent: 2797588 (1957-07-01), Wargo
patent: 2899834 (1959-08-01), Polomski
patent: 3129602 (1964-04-01), Halberg et al.
patent: 4173939 (1979-11-01), Strang

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