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US 4,567,782 AGranted
Compound parallelogram four-bar linkage
AssigneeGeneral Dynamics, Pomona Division
InventorsJohn M. Speicher, Allan A. Voigt
Life of this patent
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Abstract
A compound parallelogram four-bar linkage is provided wherein a first primary link is connected to a second primary link through connector links of substantially the same length and the pivotal angles of the first primary link and second primary link are maintained at substantially ninety degrees as movement is transferred from one primary link to the other so that the resonant frequency of the linkage does not vary and the linkage stiffness is independent of the angle of rotation.
Claims3
A linkage for transmitting oscillatory motion from a rotatable actuator to a rotatale load, comprising:
- a first four-bar parallelogram linkage connectable between the actuator and the load;
- a second four-bar parallelogram linkage connectable between the actuator and the load;
- each of said first and second four-bar parallelogram linkages comprising a first link connectable to the actuator, a second link connectable to the load, and an interconnecting link joining said first and second links;
- the first links of each of said four-bar parallelogram linkages being joined together to form therebetween a ninety degree angle;
- said second links of each of said four-bar parallelogram linkages being joined together to form therebetween a ninety degree angle, and
- each of said first and second links and said interconnecting links being of equal length;
- whereby the angular orientation of the linkage is maintained and the stiffness presented by the linkage is substantially independent of the angular position of the actuator.
4 more elements
Dependencies are inferred from the claim text.