IP Library › Granted Patent US 12,398,598
Granted Patent B2
US 12,398,598 · App. 18/206,692 · Granted Aug 26, 2025

Earth auger

Inventors: Hidenori Nagasaka (Anjo, JP); Tomohiko Imae (Anjo, JP); Yoshihiro Ito (Anjo, JP)
Assignee: MAKITA CORPORATION
E21B11/005E21B7/027E21B7/046
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Quick Facts
Patent No.
US 12,398,598
App. No.
18/206,692
Filed
Jun 7, 2023
Granted
Aug 26, 2025
Kind
B2
Art Unit
3672
USPC
175/195
Abstract

A hole is formed in a drill target with improved workability. An electric work machine includes a motor, a motor housing accommodating the motor, a handle housing including a grip including a trigger switch operable to activate the motor, a reducer, a gear housing accommodating the reducer, a rotation output unit protruding frontward from the gear housing and rotatable under a rotational force transmitted from the motor through the reducer with a drill bit being attached to the rotation output unit, and a handle fastened to the gear housing and at least partially located laterally from the gear housing.

Claims (46)

1. An earth auger, comprising:

a motor;

a motor housing accommodating the motor;

a handle housing including a grip including a trigger switch operable to activate the motor;

a reducer;

a gear housing accommodating the reducer;

a rotation output unit protruding frontward from the gear housing, the rotation output unit being rotatable under a rotational force transmitted from the motor through the reducer with a drill bit being attached to the rotation output unit; and

a handle fastened to the gear housing and at least partially located laterally from the gear housing,

wherein

with the motor housing located above the gear housing, the gear housing has a lower end flush with at least a part of the handle, and

with the lower end of the gear housing in contact with a ground, the handle is at least partially in contact with the ground.

2. The earth auger according to claim 1 , wherein

the handle is at least partially located laterally from the gear housing to receive a reaction force transmitted from the rotation output unit to the gear housing.

3. The earth auger according to claim 1 , wherein the handle is loop-shaped.

4. The earth auger according to claim 1 , wherein the handle includes

a straight portion extending laterally from the gear housing, and a hand guard located below the straight portion.

5. The earth auger according to claim 1 , wherein the handle includes

a bend curved downward at a farther distance from the gear housing, and

a straight portion extending laterally from the gear housing below the bend.

6. The earth auger according to claim 1 , further comprising:

a contact member located below of the rotation output unit.

7. The earth auger according to claim 6 , wherein

the contact member is at least partially located laterally from the gear housing.

8. The earth auger according to claim 6 , wherein

the contact member is fastened to the gear housing.

9. An earth auger, comprising:

a motor;

a motor housing accommodating the motor;

a handle housing including a grip including a trigger switch operable to activate the motor;

a reducer;

a gear housing accommodating the reducer;

a rotation output unit protruding frontward from the gear housing, the rotation output unit being rotatable under a rotational force transmitted from the motor through the reducer with a drill bit being attached to the rotation output unit; and

a handle fastened to the gear housing and at least partially located laterally from the gear housing,

wherein

with a lower end of the gear housing in contact with a ground, the handle is at least partially in contact with the ground, and

the handle includes

a straight portion extending laterally from the gear housing, and

a hand guard located below the straight portion.

10. An earth auger, comprising:

a motor;

a motor housing accommodating the motor;

a handle housing including a grip including a trigger switch operable to activate the motor, the handle housing disposed above the motor housing;

a reducer;

a gear housing accommodating the reducer, the gear housing disposed below the motor housing;

a rotation output unit protruding frontward from the gear housing, the rotation output unit being rotatable under a rotational force transmitted from the motor through the reducer with a drill bit being attached to the rotation output unit; and

a loop-shaped handle disposed on a right side or a left side of the gear housing, the loop-shaped handle including an additional grip extending in a vertical direction.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 7, 2023
From: NAGASAKA, HIDENORI; IMAE, TOMOHIKO; ITO, YOSHIHIRO
To: MAKITA CORPORATION
Reel/Frame 063878/0404 →
Priority Claims (1)
JP 2022-124099 · Aug 3, 2022 · national
Continuity (1)
Related Publication 20240044215A1 · Feb 8, 2024
References Cited (5)
US 20200180124A1 · Ellice · 2020 [cited by examiner]
US 20230082162A1 · Nagasaka · 2023 [cited by examiner]
DE 202020102840U1 · 2020 [cited by examiner]
JP 2020196098A · 2020 [cited by applicant]
Translation for DE 202020102840 U1 (Year: 2025). [cited by examiner]