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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9114520 B1

PDFFull Text
Date of Patent:
Aug. 25, 2015

Filed:

Mar. 06, 2012

Power tool

Applicants:

Shinji Hirabayashi, Anjo, JP;

Tadasuke Matsuno, Anjo, JP;

Inventors:

Shinji Hirabayashi, Anjo, JP;

Tadasuke Matsuno, Anjo, JP;

Assignee:

MAKITA CORPORATION, Anjo, JP;

Attorney:

Oliff PLC

Primary Examiner:

Robert Long

Int. Cl.
CPC ...
E21B 3/00 (2006.01); E21B 17/22 (2006.01); E21B 19/16 (2006.01); E21B 19/18 (2006.01); B25F 5/00 (2006.01); B24B 23/02 (2006.01); B24B 47/12 (2006.01);
U.S. Cl.
CPC ...
B25F 5/001 (2013.01); B24B 23/028 (2013.01); B24B 47/12 (2013.01);
Abstract

Embodiments of the present invention may include a power tool having a driving motor, a spindle with a front tool and a continuously variable transmission mechanism. The driving motor is configured to output any number of output rotations. The continuously variable transmission mechanism is configured to shift the number of rotations from the driving motor in any ratio and output the shifted rotation to the spindle. The driving motor changes the number of output rotations. The continuously variable transmission mechanism changes the ratio. Both the driving motor and the continuously variable transmission mechanism serve to alter the rotational speed of the spindle.

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