US 11,667,027 B2
Working machine
Hideaki Sugiura, Anjo (JP); and Toshikazu Migita, Anjo (JP)
Assigned to MAKITA CORPORATION, Anjo (JP)
Filed by MAKITA CORPORATION, Anjo (JP)
Filed on Nov. 4, 2021, as Appl. No. 17/453,564.
Claims priority of application No. JP2020-195867 (JP), filed on Nov. 26, 2020.
Prior Publication US 2022/0161411 A1, May 26, 2022
Int. Cl. B25F 5/02 (2006.01); A01G 3/04 (2006.01); A01G 3/053 (2006.01)
CPC B25F 5/02 (2013.01) [A01G 3/053 (2013.01); A01G 2003/0461 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A working machine, comprising:
a telescopic pipe configured to adjust its length in a front-rear direction;
a front end unit attached to a front end of the pipe and including a working part;
a rear end unit attached to a rear end of the pipe; and
a prime mover configured to drive the working part,
wherein
the pipe comprises:
an outer pipe;
an inner pipe inserted in the outer pipe;
a pipe holder fixed to the outer pipe; and
a stopper disposed inside the outer pipe,
the pipe holder comprises a wall part extending inward in a radial direction with respect to an inner circumferential surface of the outer pipe,
the inner pipe includes a fixing hole having a longitudinal direction in a circumferential direction of an outer circumferential surface of the inner pipe,
a rear surface of the fixing hole has a shape extending along a plane orthogonal to the front-rear direction,
the stopper comprises:
an abutting part disposed rearward with respect to the wall part and configured to abut the wall part from behind when the inner pipe extends to a maximum length relative to the outer pipe; and
a protruding part extending inward in the radial direction from outside with respect to the outer circumferential surface of the inner pipe and configured to fit in the fixing hole of the inner pipe, and
a rear surface of the protruding part has a shape extending along a plane parallel to the rear surface of the fixing hole.