US 12,449,081 B2
Boring machine
Satoshi Tamada, Tokyo (JP)
Assigned to COSMO KOKI CO., LTD., Tokyo (JP)
Appl. No. 17/766,512
Filed by COSMO KOKI CO., LTD., Tokyo (JP)
PCT Filed Sep. 24, 2021, PCT No. PCT/JP2021/035129
§ 371(c)(1), (2) Date Apr. 4, 2022,
PCT Pub. No. WO2023/047543, PCT Pub. Date Mar. 30, 2023.
Prior Publication US 2024/0052961 A1, Feb. 15, 2024
Int. Cl. F16L 41/04 (2006.01); B26F 1/16 (2006.01); F16L 47/34 (2006.01)
CPC F16L 41/04 (2013.01) [B26F 1/16 (2013.01); F16L 47/34 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A boring machine for boring a part of a fluid pipe in an uninterrupted flow state, comprising:
a shaft member having a leading end to which a cutter is attached;
a drive mechanism configured to rotate the cutter and the shaft member around an axis of the shaft member; and
a forward and backward moving handle configured to move the cutter and the shaft member forward and backward in an axial direction of the shaft member by a handle that is manually rotated, wherein:
the forward and backward moving handle is further configured to switch a feed amount of the cutter and the shaft member in the axial direction between at least two different feed amounts according to a rotational amount of the handle, wherein the forward and backward moving handle includes at least a first input shaft and a second input shaft providing the feed amounts in the axial direction, respectively, and the feed amounts are different from each other by one revolution of the handle.