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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2019/159819
Kind Code:
This work tool comprises a planetary roller-type power transmission mechanism which transmits power in accordance with the backward movement of a spindle, wherein an improvement has been made for establishing stable frictional contact between a planetary roller and a drive surface. A power transmission mechanism 4 of a screwdriver 1 comprises a tapered sleeve 41, a gear sleeve 47, a retainer 43, and a roller 45. The tapered sleeve 41 and the gear sleeve 47 have tapered surfaces 411,475 respectively. The gear sleeve 47 is movable in an integral manner with a spindle 3 in the front-back direction relative to the tapered sleeve 41. The roller 45 is at least partially disposed between the tapered surfaces 411,475 in the radial direction relative to a drive axis A1. The screwdriver 1 includes a biasing spring 49 that restricts the roller 45 from moving in the front-back direction relative to a main housing 11.

IKUTA Hiroki (3-11-8 Sumiyoshi-cho, Anjo-sh, Aichi 02, 〒4468502, JP)
TOMINAGA Shogo (3-11-8 Sumiyoshi-cho, Anjo-sh, Aichi 02, 〒4468502, JP)
Application Number:
Publication Date:
August 22, 2019
Filing Date:
February 07, 2019
Export Citation:
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MAKITA CORPORATION (3-11-8, Sumiyoshi-cho Anjo-sh, Aichi 02, 〒4468502, JP)
International Classes:
Foreign References:
Attorney, Agent or Firm:
IWATA Tetsuyuki et al. (Ikeda, Iwata & Partner 3F Hirokoji Center Place, 2-19-19 Nishiki, Naka-ku, Nagoya-sh, Aichi 03, 〒4600003, JP)
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