Patent ID: 8991285
Filing Date: 2015-03-31
Classification: B25B

Abstract:
1. A ratchet tool comprising: a tool head having a cavity with a drive axis and an inside circumference with drive teeth extending parallel to the drive axis around the inside circumference; a drive having a drive output to impart rotation to an object and a drive input within the cavity to receive torque for rotating the output, the drive input and output being directly coupled, and having a sun gear having sun gear teeth extending parallel to the drive axis around an outer circumference of the sun gear, the drive input comprises a cylinder coaxially connected to the sun gear, the cylinder having at least one concave seat; a ratchet mechanism mounted between the tool head and the drive input, the ratchet mechanism comprises at least one pawl mounted at least partly into the at least one seat and engageable to the drive teeth and operative to directly couple the tool head to the input when the tool head is rotated in a first direction and to uncouple the tool head from the input when the tool head is rotated in a second opposite direction, wherein while the tool head is rotated in the first direction, the ratchet mechanism couples for common rotation the drive teeth of the tool head to the sun gear of the drive; a carrier having a carrier outside surface engageable by a user's finger, the carrier rotationally mounted to the tool head to rotate about the drive axis; a plurality of planet gears spaced-apart and rotationally mounted to the carrier, each planet gear having planet gear teeth extending parallel to the drive axis, the planet gears fit meshed between the drive teeth and the sun gear teeth, wherein rotation of the tool head in the second direction while the user holds the carrier outside surface stationary rotates the drive in the first direction.