US 11,725,854 B2
Cryocooler
Takahiro Kuromoto, Nishitokyo (JP); and Yosuke Matsumura, Nishitokyo (JP)
Assigned to SUMITOMO HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed by SUMITOMO HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed on Mar. 10, 2022, as Appl. No. 17/692,139.
Claims priority of application No. 2021-041071 (JP), filed on Mar. 15, 2021.
Prior Publication US 2022/0290902 A1, Sep. 15, 2022
Int. Cl. F25B 9/14 (2006.01)
CPC F25B 9/145 (2013.01) [F25B 2309/1421 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A cryocooler comprising:
a displacer that includes a lid portion and a main body portion;
a displacer drive shaft that includes a collar portion held between the lid portion and the main body portion; and
a buffer that is disposed in a clearance between the collar portion and the lid portion, or between the collar portion and the main body portion,
wherein the buffer includes a soft material and a hard material,
wherein the soft material is disposed between the collar portion and the hard material, and
wherein the soft material is an elastic body and the hard material is harder than the soft material.