US 11,987,966 B2
Portable pipe dredging machine and dredging method
Chenchen Fei, Hangzhou (CN); and Hongwu Xie, Hangzhou (CN)
Assigned to Hangzhou Hongli Pipe Machinery Co., Ltd, Hangzhou (CN)
Filed by Hangzhou Hongli Pipe Machinery Co., Ltd, Hangzhou (CN)
Filed on Sep. 8, 2022, as Appl. No. 17/939,988.
Claims priority of application No. 202111575919.X (CN), filed on Dec. 21, 2021.
Prior Publication US 2023/0193609 A1, Jun. 22, 2023
Int. Cl. E03C 1/302 (2006.01); B08B 9/045 (2006.01)
CPC E03C 1/302 (2013.01) [B08B 9/045 (2013.01); B08B 2209/04 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A portable drain cleaning machine, comprising: a flexible shaft advancing and retreating device, a casing device, a motor device, a drum device, a flexible shaft, protection tubes, and a joint; wherein
the flexible shaft advancing and retreating device is connected with the protection tubes; the protection tubes are connected with the casing device; the motor device and the drum device are arranged in the casing device; the motor device cooperates with the drum device, the flexible shaft comprises a first end connected with the drum device and a second end arranged in a funnel-shaped structure; the flexible shaft penetrates the flexible shaft advancing and retreating device and the protection tubes; any adjacent two of the protection tubes are connected by the joint;
the drum device comprises a drum body, a flexible shaft disc, and a motor connecting plate; the flexible shaft disc is arranged on the drum body; the motor connecting plate is arranged on the flexible shaft disc; the motor connecting plate is connected with the motor device; and the first end of the flexible shaft is connected with the flexible shaft disc.