Black Decker Inc.

Judd Staples

David C Campbell

Gregory W Arnold

Richard Hurn

Richard C Nickels, Jr

A power tool includes a motor having a first shaft, a transmission mechanism operatively connected to the first shaft, a second shaft operatively connected to the transmission mechanism, a housing enclosing the transmission mechanism and adapted to contain a quantity of lubricating grease, and an auger rotatably disposed within the housing on at least one of the first and second shafts for circulating the grease within the housing. A blade may be operatively connected to the second shaft. The transmission mechanism includes a first gear operatively connected to the first shaft, and a second gear operatively connected to the second shaft, where the second gear operatively meshes with the first gear. It may be advantageous to dispose the first and second gears in such a manner so that distance between the blade and the second gear is larger than the distance between the blade and the first gear.

Power tool with lubricating system

The disclosed portable circular saw includes a motor having an axis, a housing enclosing the motor therein, a handle carried by the housing, an arbor operatively connected to the motor, the arbor having an axis of rotation substantially perpendicular to the motor axis, and a shoe supporting the housing thereon. The housing is inclined at an angle relative to the shoe. The handle is also disposed between the housing and the shoe. Preferably, the housing inclination angle is about 45.degree.. The saw may also include a drive shaft disposed on the motor axis and a transmission mechanism connected to the arbor and the drive shaft. This transmission mechanism creates a torque in the rotational direction opposite to the rotational direction of the arbor. Preferably, the transmission mechanism includes a first gear disposed on the drive shaft, and a second gear disposed on the arbor, where the second gear meshes with the first gear. It is preferable that distance from the blade to the end of arbor is longer than distance from the blade to the drive shaft. The saw may also include a hook assembly attached to the handle at a position relative to the saw's center of gravity so that, when the circular saw is hung from the hook assembly, the handle pivots upward. Preferably, the hook assembly is a folding hook assembly. The hook assembly may include a barrel integrally attached to the handle, and a hook slidably connected to the barrel.

Portable circular saw

A power tool includes a motor having a first shaft, a transmission mechanism operatively connected to the first shaft, a second shaft operatively connected to the transmission mechanism, a housing enclosing the transmission mechanism and adapted to contain a quantity of lubricating grease, and a grease propeller rotatably disposed within the housing on at least one of the first and second shafts for circulating the grease within the housing. A blade may be operatively connected to the second shaft. The transmission mechanism includes a first gear operatively connected to the first shaft, and a second gear operatively connected to the second shaft, where the second gear operatively meshes with the first gear. It may be advantageous to dispose the first and second gears in such a manner so that distance between the blade and the second gear is larger than the distance between the blade and the first gear.

Growing community of inventors

Baltimore, MD, United States of America

Judd Staples