US 12,435,911 B2
Free-piston Stirling engine
Junichi Kamoi, Niigata (JP); and Kazuya Kondo, Niigata (JP)
Assigned to Twinbird Corporation, Niigata (JP)
Appl. No. 18/688,246
Filed by Twinbird Corporation, Niigata (JP)
PCT Filed Aug. 8, 2022, PCT No. PCT/JP2022/030259
§ 371(c)(1), (2) Date Feb. 29, 2024,
PCT Pub. No. WO2023/032604, PCT Pub. Date Mar. 9, 2023.
Claims priority of application No. 2021-140025 (JP), filed on Aug. 30, 2021.
Prior Publication US 2024/0376850 A1, Nov. 14, 2024
Int. Cl. F25B 9/14 (2006.01); F01B 29/10 (2006.01); F02G 1/043 (2006.01)
CPC F25B 9/14 (2013.01) [F01B 29/10 (2013.01); F02G 1/0435 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A free-piston Stirling engine comprising:
a cylinder;
a reciprocating body capable of reciprocating inside the cylinder along an axial direction of the cylinder;
an elastic body for controlling a reciprocating motion of the reciprocating body;
a connection body for connecting the reciprocating body to a movable portion of the elastic body;
a support body for fixing a fixation portion of the elastic body with the cylinder;
a weight body for adjusting a movable mass including the reciprocating body and the connection body; and
an attachment portion for attaching the weight body, wherein
the connection body has a connection main body and a nut,
the connection main body is fixed to the reciprocating body,
the movable portion of the elastic body is sandwiched by the connection main body and the nut,
the attachment portion is composed of a female screw member and a male screw member that is to be screwed to the female screw member,
the male screw member is provided on the side of the elastic body that is opposite to the reciprocating body, and
the weight body is sandwiched by the connection main body and the male screw member.