Adjustment means for achieving equal crankpin loading in a contr

Details Adjustment means for achieving equal crankpin loading in a contr Adjustment means for achieving equal crankpin loading in a contr

1977-06-03

1979-03-06

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Having positive means for impeller adjustment

Motor bodily rotatable with impeller hub or shaft

416167, B63H 308

Patent

active

041428340

ABSTRACT:
A controllable pitch propeller has a plurality of connecting rods running from a piston, through the end wall of a cylinder. The cylinder is affixed to a first set of blade turning crankpins forming part of a blade turning assembly. A piston, mounted for axial movement in the cylinder, is coupled to the connecting rods that in turn are connected to a second set of blade turning crankpins in the blade turning assembly. The piston and cylinder are relatively movable to rotate the blades through the crank pins. Due to normal tolerance variations during manufacture, the lengths of the total train of connections between the piston and the cylinder through the blade turning assembly are not identical, causing the length of the portion of the connecting rods protruding into the cylinder through the cylinder end wall to vary relative to the cylinder end wall. Adjustable members are provided at the connections between the connecting rods and the piston to adjust for the variable length in the connecting rods so that the length of the connections through the blade turning assembly are effectively equalized, resulting in equal loading on each of the connecting rods and crankpins when hydraulic pressure is applied to the piston.

REFERENCES:
patent: 2355039 (1944-08-01), Eves
patent: 2870848 (1959-01-01), Liaaen
patent: 2913057 (1959-11-01), Willi
patent: 3171494 (1965-03-01), Liaaen
patent: 3676016 (1972-07-01), Feroy

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