Patent · US Active

Power tool with high-speed electric motor

US9364906B2 · kind B2 · utility

15Cited by

4References

18Claims

0Family size

Assignee

MAKITA CORPORATION · JP

Inventors

Kenji Abe · Anjo, JP
Masayoshi Okumi · Anjo, JP
Hidenori Nagasaka · Anjo, JP
Motohiro Omura · Anjo, JP
Masaaki Fukumoto · Anjo, JP
Kenji Shibata · Tsukuba, JP
Nobuyasu Furui · Anjo, JP
Masanori Higashi · Takatsuki, JP
Kiyoshi Aoyama · Anjo, JP

Key dates

Filing date	Jan 15, 2014
Grant date	Jun 14, 2016
Priority date	—
Expiry date	Dec 21, 2034

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25F5/02
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A hand-held power tool includes a motor having a stator and a rotor, the motor being configured to rotate the rotor at a speed of at least 40,000 rpm, an output shaft directly driven by the rotor, a tool accessory shaft configured to support a tool accessory, and a two-stage speed reducing transmission operably connecting the output shaft to the tool accessory shaft. The two-stage speed reducing transmission is configured to drive the tool accessory shaft at a rate less than the rotor speed, for example, at a rate less than or equal to 37.5% of the rotor speed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.