Patent ID: 11897592
Assignee: THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF THE NAVY
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. An automatic passive variable pitch propeller assembly connectable to a propeller drive shaft, said assembly comprising:
a base hub with a pressure flange and a spring plate, said base hub connected to the propeller drive shaft with a set screw in the side of said base hub that contacts a side of the propeller drive shaft;
at least two blade shafts radially extending from the propeller drive shaft with each said blade shaft extending into said base hub adjacent to said pressure flange and opposite to a top portion of said spring plate;
at least two propeller blades with each of said at least two propeller blade shafts rotatable about each of said blade shafts;
a spring capable of transmitting a dynamic load to said spring plate; and
a lever screw for each of said propeller blades with said lever screw projecting at an acute angle with respect to each said blade shaft wherein said lever screw is capable of contacting said pressure flange so that movement of said spring plate along a central axis aligned with the propeller drive shaft is capable of rotating said blade shaft.