Double saggital push stroke amplifier
First Claim
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1. A double saggital stroke amplifier, comprising:
- an electroexpansive actuator energizable to responsively expand in length by a predetermined amount;
a relatively rigid reference support frame;
means providing a first saggital linkage having first and second ends connected to respective ends of said electroexpansive actuator, and the midpoint of said first linkage being connected to said support frame;
means providing a second saggital linkage having first and second ends connected to respective ends of said electroexpansive actuator, and the midpoint of said second linkage being free to move in response to said electroexpansive actuator and with respect to the fixed midpoint of said first linkage;
wherein said midpoints of said first and second linkages are separated from each other by a distance that is less than the distance between connected endpoints.
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Abstract
A piezoelectric motor actuated amplifier mechanism that utilizes a pair of saggital linkages having one relatively fixed saggital midpoint and joined at their end points to obtain a doubled amplification factor push stroke output from one relatively movable saggital midpoint. Thermal compensators are employed between the piezoelectric actuator and the saggital linkages to stabilize the amplifier throughout a wide range of temperatures.
31 Citations
9 Claims
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1. A double saggital stroke amplifier, comprising:
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an electroexpansive actuator energizable to responsively expand in length by a predetermined amount; a relatively rigid reference support frame; means providing a first saggital linkage having first and second ends connected to respective ends of said electroexpansive actuator, and the midpoint of said first linkage being connected to said support frame; means providing a second saggital linkage having first and second ends connected to respective ends of said electroexpansive actuator, and the midpoint of said second linkage being free to move in response to said electroexpansive actuator and with respect to the fixed midpoint of said first linkage; wherein said midpoints of said first and second linkages are separated from each other by a distance that is less than the distance between connected endpoints. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A double saggital stroke amplifier, comprising:
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an electroexpansive actuator energizable to responsively expand in length by a predetermined amount; a relatively rigid reference support frame; means providing a first saggital linkage having first and second ends connected to respective ends of said electroexpansive actuator, and the midpoint of said first linkage being connected to said support frame; means providing a second saggital linkage having first and second ends connected to respective ends of said electroexpansive actuator, and the midpoint of said second linkage being separated from the midpoint on said first linkage by a first predetermined distance and being free to move in response to said electroexpansive actuator and with respect to the fixed midpoint of said first linkage; wherein said first predetermined distance is less than the distance between the connected ends.
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9. A double saggital push stroke amplifier comprising:
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a first bow-shaped saggital linkage having a defined midpoint and pivotal end points; a second bow-shaped saggital linkage having a defined midpoint and pivotal end points; a pair of bridge elements rigidly connecting and separating corresponding pivotal end points on said first and second linkages by a predetermined first distance; an electroexpansive actuator connected between said bridge elements for forcing said bridge elements away from each other a prescribed distance when energized; said midpoints of said first and second bow-shaped saggital linkages are separated by a distance that is less than said first distance of end point separation; a relatively rigid reference support frame connected to said midpoint of said first linkage; whereby said midpoint of said second linkage provides an amplified push stroke output with respect to said fixed midpoint when said electroexpansive drive element is energized to expand by a predetermined amount in its length dimension between said bridge elements.
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Specification