Patent ID: 9415448
Filing Date: 2016-08-16
CPC Classification: B23B,B25B

Claim Text:
1. A power drill comprising: a housing; a motor in the housing: a planetary transmission in the housing, centered on an axis, and including a drive stem rotatable in the housing about the axis and rotationally coupled to the planet carrier; a chuck body rotatable on the housing; a plurality of adjustable jaws in the chuck body; a driver axially bearing on the jaws and axially shiftable to position the jaws; a sleeve threaded to the driver and rotatable to position the jaws in the chuck body; a mode-control assembly having the elements of the assembly coupling the drive stem either to the chuck body for rotating a tool held by the jaws in a screw or drill mode or to the sleeve in a tighten/loosen mode for tool exchange; a torque-adjustment pin axially shiftable in the housing in one of the modes but not rotatable about the axis and axially engageable with the cams on the front face of the ring gear to inhibit rotation of the ring gear; a first spring axially inwardly bearing on the pin in at least one mode for pressing the pin against the front face with an adjustable axially inwardly directed force; and a second spring braced axially between a rear face of the ring gear and the housing and biasing the ring gear axially outward with a second spring force.