Black Decker Inc.

Frank J O'Hara

John E Dibbern, Jr

Robert G Moores, Jr

William D Sauerwein

William R Stumpf

Robert I Somers

Robert Alan Berry

William G Harman, Jr

John W Miller

Gregory E Moores

Stephen A Debelius

A drill,for driving a bit,into a workpiece,includes an assembled anvil,and spindle,, which are mounted for rotation together and for axial movement together within a drill housing,. A planet carrier,is driven by a motor,and, in turn rotatingly drives the anvil,and the spindle,. A chuck,is attached to a forward end of the spindle,for rotation and axial movement therewith. A plurality of rollers,are mounted in nests,of a roller cage,, are maintained in parallel with an axis of the drill,, and the anvil,. The rollers,, which are included in an automatic spindle lock,, can be wedged between a fixed surface,of the drill housing,and a movable surface,of the anvil for automatically locking the spindle,with the housing. Following withdrawal of the bit,from the workpiece,, an automatic brake,provides facility for braking the spindle,. When the planet carrier,ceases to be driven, the anvil,and the spindle,are in a coasting mode relative to the slowing speed of the planet carrier,. An automatic drag system,provides a drag between the coasting anvil,and the planet carrier,to bring the coasting speed of the anvil generally in line with the slowing speed of the planet carrier.

Power driven rotary device

A tool bit such as a screw driving bit for use with a rotary power tool is conventiently stored in a cavity in the rotary power tool housing when not in use in a power tool chuck. The tool bit is retained in the recess by frictional engagement with a retainer spring. A push-button protruding from the rotary tool housing communicates with the bit holding cavity and retainer spring in a manner such that, upon depression of the push-button, the retainer spring is moved out of frictional engagement with the bit to enable its release from the storage cavity.

Push-button controlled apparatus for releasably storing a tool bit

A field subassembly is assembled by positioning two coil supports adjacent respective core end faces of a ferromagnetic core. The core-engaging surfaces of the coil supports and the core end faces have respective surfaces which are uninterrupted by projections. During the assembly of the field, fasteners are pushed into the respective coil supports and the core such that the fasteners engage mounting holes in the coil support with a press-fit. After the field is wound, a brush holder subassembly is also pressed onto the fasteners and the resultant core subassembly is connected to a field housing by driving the fasteners in a conventional fashion. In the preferred embodiment, the fasteners provide a three-point contact with mounting holes formed in the coil supports and the brush holder subassembly. This enables the fasteners to maintain the coil supports and the brush holder subassembly in alignment with the core while shearing a minimum of material from the coil supports and brush holder subassembly when the fasteners are pushed into their respective mounting holes. Then, the same fasteners remain with the subassembly to connect the field subassembly to the field housing.

Method of making a field subassembly

A depth-adjusting system for a power tool includes a housing nose portion on which is snapped a two-piece, molded plastic depth-adjusting subassembly. Each member of the subassembly engages a respective area of the nose portion. An adjustment member is rotatably connected to the nose portion, but is releasably restrained from axial movement upon engagement with a split-ring detent on the nose portion. A locator member is threadably connected inside the adjustment member, but is restained from rotating through the interaction of integral keys formed on its interior cylindrical surface with mating longitudinal keyways formed on the nose portion. Thus when the operator rotates the adjustment member, the locator member is forced to move axially forwardly or rearwardly, depending upon the direction of rotation of the adjustment member. Another feature of this system is the use of protuberances integrally formed in the rear axial end of the locator member to inhibit lock-up between the locator member and the adjustment member after the locator member has been drawn inwardly to its rearmost position.

Depth-adjusting system for a power tool

Methods of assembling field subassemblies

A switch has a body mounted directly on the rear bearing boss of the integral web portion of a molded plastic field case for a power tool or other motor-driven device. The switch has a pair of spaced contacts engaging the respective rearward end portions of a complementary pair of contact elements carried by the web portion of the field case. The respective forward end portions of the contact elements are connected to respective terminals on the field.

Growing community of inventors

Hanover, PA, United States of America

Frank J O'Hara