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US 2013/0220112 A1Published application
Cryogenic refrigerator
AssigneeSumitomo Heavy Industries, Ltd.
InventorKoji YAMADA
Life of this patent
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Abstract
A cryogenic refrigerator includes a cylinder; a displacer configured to reciprocate in the cylinder; a driving unit configured to drive a rotational shaft having an axial direction oriented in a direction of reciprocating movement of the displacer; and a movement conversion unit configured to convert rotational movement of the rotational shaft into the reciprocating movement of the displacer. The movement conversion unit is a screw unit including a male thread and a female thread one of which is a part of the displacer.
Claims6
A cryogenic refrigerator, comprising:
- a cylinder;
- a displacer configured to reciprocate in the cylinder;
- a driving unit configured to drive a rotational shaft having an axial direction oriented in a direction of reciprocating movement of the displacer;
- and
- a movement conversion unit configured to convert rotational movement of the rotational shaft into the reciprocating movement of the displacer,
- wherein the movement conversion unit is a screw unit including a male thread and a female thread one of which is a part of the displacer.
3 more elements
Dependencies are inferred from the claim text.