Actuator of shape memory effect material

• US 4,716,731 A
• Filed: 08/12/1986
• Issued: 01/05/1988
• Est. Priority Date: 08/16/1985
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Sakai, Toshikazu, Higomura, Makoto
• Primary Examiner(s): Husar, Stephen F.
• Application Number:
  US06/895,698
• Time in Patent Office: 511 Days
• Field of Search: 60/527, 60/528, 60/529, 148/402, 337/140, 337/139, 251/11, 236/101 R, 236/101 B
• US Class Current: 60/527
• CPC Class Codes: B25J 9/1085 positioning by means of shape-memory materials shape memory actuators F03G7/06
• CPC Class Codes: F03G 7/065 using a shape memory element
• CPC Class Codes: F16F 2224/0258 Shape-memory metals, e.g. Ni-Ti alloys

Abstract

An actuator made of a material having a shape memory effect includes a plurality of materials having a shape memory effect and a heat insulator member. The plurality of materials having a shape memory effect are disposed with the heat insulator member interposed therebetween, and the plurality of materials and the insulator member are joined together.

Claims

1. An actuator, comprising:

a plurality of materials having a shape memory effect;

a heat insulator member; and

heating means for providing said plurality of materials with heat, wherein said plurality of materials having a shape memory effect disposed with said heat insulator member interposed therebetween, and said plurality of materials and said insulator member are joined together.

2. An actuator according to claim 1, wherein said plurality of materials having a shape memory effect includes a material having a shape memory effect and a different deformation quantity.

3. An actuator according to claim 1, wherein said plurality of mateirals having a shape memory effect each have a different deformation quantity.

4. An actuator according to claim 1, wherein said heating means also comprises means for cooling said plurality of materials.

5. An actuator, comprising:

a plurality of materials having a shape memory effect, said materials being serially joined together;

means for independently controlling the temperature of said plurality of materials; and

means for changing the length of said joined plurality of materials by controlling the temperature of at least one of said plurality of materials by means of said temperature controlling means.

6. An actuator according to claim 5, wherein said temperature control means includes heating means and cooling means.

7. An actuator according to claim 5, wherein said plurality of materials having a shape memory effect each have a different deformation quantity.

8. An actuator according to claim 7, wherein the ratio in length between the respective ones of said plurality of materials is set to form a predetermined series.

9. An actuator according to claim 5, wherein said changing means changes the total length of said joined materials into a desired length by operating said temperature controlling means once.

10. An actuator, comprising:

a plurality of materials having a shape memory effect, said materials being serially joined together;

means for independently controlling the temperature of said plurality of materials;

a driven unit coupled to said serially joined plurality of materials; and

means for driving said driven unit by controlling the temperature of at least one of said plurality of materials by means of said temperature controlling means.

11. An actuator according to claim 10, wherein said temperature control means includes heating means and cooling means.

12. An actuator according to claim 10, wherein said plurality of materials having a shape memory effect each have a different deformation quantity.

13. An actuator according to claim 12, wherein the ratio in length between the respective ones of said plurality of materials is so set to form a predetermined series.

14. An actuator according to claim 10, wherein said driving means drives said driven unit by a desired distance by operating said temperature controlling means once.

15. An actuator using a material having a shape memory effect comprising:

a joined member which is constructed by joining together units of a predetermined length and interposing an insulator member therebetween, said units having been separated from a material of a uniform composition having a shape memory effect and having been memorized with a predetermined shape;

means for independently controlling the temperature of said units; and

means for changing the full length of said joined member by controlling the temperature of at least one of said units.

16. An actuator according to claim 15, wherein the ratio in length between the respective ones of said units is so set to form a predetermined series.