US 11,987,076 B1
Caster having smooth 180° reverse rotation
Heon Mun Lee, Gunpo-si (KR)
Appl. No. 18/288,381
Filed by Heon Mun Lee, Gunpo-si (KR)
PCT Filed Oct. 26, 2022, PCT No. PCT/KR2022/016418
§ 371(c)(1), (2) Date Oct. 26, 2023,
PCT Pub. No. WO2023/075390, PCT Pub. Date May 4, 2023.
Claims priority of application No. 10-2021-0148652 (KR), filed on Nov. 1, 2021.
Int. Cl. B60B 33/00 (2006.01)
CPC B60B 33/0068 (2013.01) 1 Claim
OG exemplary drawing
 
1. A caster which smoothly rotates 180° in reverse, the caster comprising:
a support plate (2) formed in an upper end portion of a caster (1); and
a central portion (3), a connecting part (4), and a lower body part (5), which are disposed under the support plate (2), are sequentially mounted;
wherein the central portion (3) includes an upper pillar part (6) and a lower pillar part (7), and the upper pillar part (6) and the lower pillar part (7) are disposed diagonally,
a central portion of the support plate (2) and the upper pillar part (6) are fixed using an upper nut (8),
a thrust ball bearing (9) is mounted between the support plate (2) and the upper nut (8),
the lower body part (5) and the lower pillar part (7) are fixed using a lower nut (10), and a thrust ball bearing (11) is mounted between the lower body part (5) and the lower nut (10),
a thrust ball bearing (12) is mounted between an outer upper surface of the lower body part (5) and an outer lower surface of the central portion (3),
the connecting part (4) is mounted on an outside of the support plate (2),
a thrust ball bearing (13) is mounted between the support plate (2) and the connecting part (4),
a rotating part (20) is mounted between a lower side of the connecting part (4) and an outer side of the central portion (3),
a thrust ball bearing (21) is mounted between the connecting part (4) and the rotating part (20), and
a thrust ball bearing (22) is mounted between the rotating part (20) and the central portion (3).