Fluid reaction surfaces (i.e. – impellers) – With measuring – testing – signalling or inspection means
Patent
1997-10-10
1999-10-19
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
With measuring, testing, signalling or inspection means
416157R, 416159, 416167, 416168R, 416166, 440 50, 440900, B63H 304
Patent
active
059677503
ABSTRACT:
A variable-pitch marine propeller system has a propeller unit for mounting on a drive shaft, and a power unit including a stationary annular hydraulic cylinder for operating the propeller unit, a hydraulic remote control unit being fluid-coupled to the power unit. An annular piston of the hydraulic cylinder is coupled to a ring-shaped actuator yoke by a roller thrust bearing, the actuator yoke axially displacing a mating yoke of the propeller unit with which the actuator yoke is allowed to rotate. The piston operates in a sealed environment for the exclusion of water from the separately sealed surfaces of the cylinder itself. In one configuration, the propeller unit is replaceable without disturbing the sealed environment of the annular piston. The control unit includes a hydraulic control cylinder that is operated by a rotatably mounted barrel that engages a threaded piston rod. Alternatively, the control cylinder is actuated by a lever having biasing springs and an adjustable brake.
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International Search Report; Mar. 3, 1999; 6 p.
Look Edward K.
Shanley Matthew T.
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