公开(公告)号：US11376716B2

公开(公告)日：2022-07-05

申请号：US17013598

申请日：2020-09-06

申请人： YO HAU CHANG'S ENTERPRISE CO., LTD.

发明人： Kuei-Chuan Chang

IPC分类号： B25B13/46 ,  B25B23/00

摘要： A ratchet wrench has a head. The head is recessed with a driving chamber. A ratchet wheel is disposed in the driving chamber. The driving chamber is covered with a cover plate. The head further has a first shaft hole. The cover plate has a second shaft hole. Two sides of the ratchet wheel are provided with a first shaft portion inserting through the first shaft hole and a second shaft portion inserting through the second shaft hole, respectively. A bearing ring is sleeved onto the second shaft portion. An outer periphery of the bearing ring abuts against an inner wall surface of the driving chamber for positioning and lubricating the ratchet wheel, so that the ratchet wheel can rotate smoothly.

公开(公告)号：USD944611S1

公开(公告)日：2022-03-01

申请号：US29699019

申请日：2019-07-22

申请人： YO HAU CHANG'S ENTERPRISE CO., LTD.

设计人： Kuei-Chuan Chang

公开(公告)号：US20210107119A1

公开(公告)日：2021-04-15

申请号：US17013598

申请日：2020-09-06

申请人： YO HAU CHANG'S ENTERPRISE CO., LTD.

发明人： KUEI-CHUAN CHANG

IPC分类号： B25B13/46 ,  B25B23/00

摘要： A ratchet wrench has a head. The head is recessed with a driving chamber. A ratchet wheel is disposed in the driving chamber. The driving chamber is covered with a cover plate. The head further has a first shaft hole. The cover plate has a second shaft hole. Two sides of the ratchet wheel are provided with a first shaft portion inserting through the first shaft hole and a second shaft portion inserting through the second shaft hole, respectively. A bearing ring is sleeved onto the second shaft portion. An outer periphery of the bearing ring abuts against an inner wall surface of the driving chamber for positioning and lubricating the ratchet wheel, so that the ratchet wheel can rotate smoothly.