US 12,251,807 B2
Driving tools
Norikazu Baba, Anjo (JP); Shun Kuriki, Anjo (JP); Kazusa Fukuda, Anjo (JP); and Masaya Nagao, Anjo (JP)
Assigned to MAKITA CORPORATION, Anjo (JP)
Filed by MAKITA CORPORATION, Anjo (JP)
Filed on May 1, 2023, as Appl. No. 18/141,718.
Claims priority of application No. 2022-079285 (JP), filed on May 13, 2022; and application No. 2023-043043 (JP), filed on Mar. 17, 2023.
Prior Publication US 2023/0364762 A1, Nov. 16, 2023
Int. Cl. B25C 1/04 (2006.01); B25C 1/06 (2006.01)
CPC B25C 1/047 (2013.01) [B25C 1/06 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A driving tool, comprising:
a piston movable in a driving direction due to gas pressure;
a driver provided at the piston and configured to move integrally with the piston to strike a fastener;
a plurality of rack teeth formed on the driver and along the driver in the driving direction; and
a wheel provided with a plurality of engaging portions at an outer circumference of the wheel, the plurality of engaging portions configured to engage the plurality of the rack teeth, wherein:
the wheel rotates to cause the driver to move in a counter-driving direction opposite the driving direction,
at least one of the plurality of the engaging portions of the wheel is an advancing/retracting engaging portion configured to be movable with respect to a rotation axis about which the wheel primarily rotates,
the plurality of rack teeth includes a first rack tooth, a second rack tooth, and a third rack tooth,
wherein the driver has a first tooth groove defined between the first rack tooth and the second rack tooth, and
a deep tooth groove defined between the second rack tooth and the third rack tooth, and
and wherein the deep tooth groove is configured to receive the advancing/retracting engaging portion and to have a depth greater in a direction perpendicular to the driving direction than the first tooth groove.