Patent application number | Description | Published |
20080284373 | CORDLESS POWER TOOL SYSTEM HAVING SLIDABLY-ENGAGING POWER SOURCE CONNECTION - A system of cordless power tools includes a cordless power tool adapted to removably receive a rechargeable battery pack. The battery pack and the power tool can have complementary grooves and rails or L-shaped surfaces that aid in aligning the positive and negative blade terminals of the battery pack to the positive and negative tool terminals, respectively, of the power tool. | 11-20-2008 |
20090064810 | TRANSMISSION AND VARIABLE RADIALLY EXPANDING SPRING CLUTCH ASSEMBLY - A transmission generally includes a shaft member having a continuous cylindrical surface portion longitudinally disposed next to a cylindrical outer surface portion interrupted by longitudinal grooves. A first gear assembly has a first clutch spring that holds a first set of rolling members between lobes that extend from a first output gear. A second gear assembly has a second clutch spring that holds a second set of rolling members between lobes that extend from a second output gear. The first gear assembly and the second gear assembly are configured to move longitudinally along the shaft member to a position where at least one of the first gear assembly and the second gear assembly is engaged for rotation with the shaft member when a value of torque at the shaft member is below a torque threshold value. | 03-12-2009 |
20090145520 | JOIST DRILL - A power tool for drilling a hole in a workpiece made of wood or a wood material. The power tool generally includes a tool housing defining a handle and a motor contained within the tool housing that includes an output shaft that spins about a motor axis. A gear housing is connected to the tool housing. An output spindle is supported for rotation about a spindle axis in the gear housing. The spindle axis is disposed about ninety degrees from the motor axis. A gear portion on the output shaft is engaged to a gear portion on the output spindle. The motor and the gear portions are configured to rotate the output spindle at a speed in range from about five thousand revolutions per minute to about twenty-five thousand revolutions per minute. A cutting member is connected to the output spindle. The cutting member includes fluted cutting blades. A carriage assembly includes a base member and a head member connected by a first post having a first compliant member and a second post. The head member slides relative to the first and second posts and against a force exerted by the first compliant member when the head member is moved toward the base member to pass the cutting member through the base member to engage the workpiece. The base member includes a generally planar face on a bottom surface of the base member that is generally perpendicular to the spindle axis. | 06-11-2009 |
20100107423 | HANDLE AND ATTACHMENTS FOR RIGHT ANGLE DRILL - A power tool can utilize a handle that engages with a large portion of the housing and can distribute the stresses incurred by the handle over a larger area. The handle of the power tool can be a stick handle or a guard handle. The handle may be utilized to position sensors therein at positions that are remote from the working bit of the power tool. Accessory handles, such as a bail handle and a side handle, can be mounted to a single set of machined passages on the housing. | 05-06-2010 |
20100108337 | COMPLIANT SHIFTING MECHANISM FOR RIGHT ANGLE DRILL - A compliant shifting mechanism can change the operation of a power tool between first and second operating conditions. The shifting mechanism can provide two distinct forces on a gear set during movement of the gear set between the two operating conditions. The shifting mechanism can provide a user with a tactile sensation of the completion of the transition between the two operating conditions without the gear set completing the full transition. A shifting mechanism can automatically complete the change between operating conditions, regardless of an alignment between the gear set and another component. The two distinct forces can be a torsional resistance force and a bending resistance force. | 05-06-2010 |
20100276244 | Transmission and Variable Radially Expanding Spring Clutch Assembly - A transmission generally includes a shaft member having a cylindrical outer surface in which longitudinal grooves are formed. Rolling members are disposed in the longitudinal grooves. A gear member having lobes the lobes is disposed between the rolling members and over the shaft member. A clutch spring that at least partially encircles the rolling members and the lobes is also disposed. The clutch spring includes a reduced torque condition that at least defines the clutch spring stretching to accommodate the rolling members leaving the longitudinal grooves and moving to the outer cylindrical surface such that the clutch spring forms a generally elliptical shape in the reduced torque condition. | 11-04-2010 |
20100300226 | Transmission and Variable Radially Expanding Spring Clutch Assembly - A transmission generally includes a shaft member having a continuous cylindrical surface portion longitudinally disposed next to a cylindrical outer surface portion interrupted by longitudinal grooves. A first gear assembly has a first clutch spring that holds a first set of rolling members between lobes that extend from a first output gear. A second gear assembly has a second clutch spring that holds a second set of rolling members between lobes that extend from a second output gear. The first gear assembly and the second gear assembly are configured to move longitudinally along the shaft member to a position where at least one of the first gear assembly and the second gear assembly is engaged for rotation with the shaft member when a value of torque at the shaft member is below a torque threshold value. | 12-02-2010 |
20100319474 | TRANSMISSION AND VARIABLE RADIALLY EXPANDING SPRING CLUTCH ASSEMBLY - A transmission generally includes a shaft member having a continuous cylindrical surface portion longitudinally disposed next to a cylindrical outer surface portion interrupted by longitudinal grooves. A first gear assembly has a first clutch spring that holds a first set of rolling members between lobes that extend from a first output gear. A second gear assembly has a second clutch spring that holds a second set of rolling members between lobes that extend from a second output gear. The first gear assembly and the second gear assembly are configured to move longitudinally along the shaft member to a position where at least one of the first gear assembly and the second gear assembly is engaged for rotation with the shaft member when a value of torque at the shaft member is below a torque threshold value. | 12-23-2010 |