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    • 3. 发明授权
    • Thermally driven piston assembly and position control therefor
    • 热驱活塞组件及其位置控制
    • US07647771B2
    • 2010-01-19
    • US11374480
    • 2006-03-08
    • Donald L. Thomsen, IIIRobert G. Bryant
    • Donald L. Thomsen, IIIRobert G. Bryant
    • F01B29/10
    • F16F1/3605F03G7/06F15B2015/208F16F9/006F16F9/16F16F9/53F16F2222/02F16F2236/045
    • A thermally driven piston assembly's housing has (i) a first material slidingly fitted therein, and (ii) at least one plug of a second material slidingly fitted therein and abutting the first material. The first material is one (e.g., a liquid crystal elastomer) that undergoes a stiffness change and/or a dimensional change when subjected to a temperature change in the temperature range of interest. When subjected to the temperature change while in the housing, the first material is restricted to changing dimensionally along a single dimension. The second material retains its shape and size throughout the temperature range of interest. As a result, the plug moves in the housing in correspondence with the dimensional change of the first material or the plug's movement is damped by the stiffness change of the first material.
    • 热驱动活塞组件的壳体具有(i)滑动地装配在其中的第一材料,和(ii)滑动地装配在其中并邻接第一材料的第二材料的至少一个塞子。 第一种材料是当在感兴趣的温度范围内经历温度变化时经历刚度变化和/或尺寸变化的一种(例如,液晶弹性体)。 当在壳体中经受温度变化时,第一材料被限制为沿着单个尺寸尺寸变化。 第二种材料在感兴趣的温度范围内保持其形状和尺寸。 结果,塞子在壳体中与第一材料的尺寸变化相对应地移动,或者塞子的运动被第一材料的刚度变化所阻尼。