| Patent Number |
Title Of Patent |
Date Issued |
| 5427483 |
Electric hand plane with planing depth adjuster |
June 27, 1995 |
| An electric hand plane has a wedge-shaped body having a lower wedge surface adapted to rest on a workpiece and an upper wedge surface, a plane housing supported on the upper wedge surface of the wedge-shaped body and having a counter-surface, a device for producing a clamping force betwe |
| 4683659 |
Chain saw with oil pump having a plunger piston |
August 4, 1987 |
| A chain saw is provided with an oil pump for supplying oil to the saw chain. The pump includes a piston immersed in a chamber formed in the housing of the saw and rotatable by a gear rigidly connected to the piston and rotated by another gear driven by a motor. The gear connected to the |
| 4562389 |
Automatic screwdriver or torquing tool control system |
December 31, 1985 |
| To permit reliable turn-OFF of the motor when the torque of the motor is sufficient to provide for reliable seating of a screw or nut being driven thereby, start conditions of the motor are sensed, either in form of low-current condition or high power factor; high-torque conditions are |
| 4502549 |
Spring-coupled power screwdriver |
March 5, 1985 |
| A helical spring couples a drive shaft geared to the motor with the work spindle. With this arrangement hard screwdriving operations can be extended in time so that time is added for the drive motor to come a stop after it is switched off. Transducers are provided for measuring the t |
| 4463293 |
Method and apparatus for shutting off a power screwdriver |
July 31, 1984 |
| A power screwdriver that is equipped with a spring coupling between the motor drive and the tool spindle, a signal that indicates that a certain value of torque has been overstepped, at which the screwdriver must be sopped, first causes reversal of the motor, but before the motor app |
| 4458565 |
Torque limiting power screwdriver |
July 10, 1984 |
| A torque limiting power screwdriver includes a housing in which there is supported for rotation and axial displacement a screwdriver spindle. A transmission transmits power from a motor to the screwdriver spindle. A torque overload coupling and a separating coupling are interposed in the |
| 4368784 |
Power screwdriver |
January 18, 1983 |
| A power screwdriver has a drive motor and a tool holder arranged in a housing, a driving coupling including a driving coupling part driven by the motor and a driven coupling part, and a locking coupling arranged between the driving coupling and the tool holder, wherein the couplings |
| 4274642 |
Tool chuck |
June 23, 1981 |
| In order to improve the holding power of a tool chuck, especially a tool chuck for use with percussion or impact drills, without the use of elastic friction elements that impede intentional opening and closing, the invention describes a tool chuck in which cooperating, preferably conical |
| 3955628 |
Hammer drill |
May 11, 1976 |
| A driven output shaft is mounted in a housing and has freedom of limited axial displacement between a first and a second position. A biasing spring permanently biases the output shaft to the first position. An impact member surrounds the output shaft and has a plurality of angularly spac |
| 3931744 |
Hammer-drill |
January 13, 1976 |
| An axially reciprocable rotary spindle is mounted in the housing, and a first biasing arrangement urges the spindle in one axial direction outwardly of the housing. An impact member is mounted on this spindle for rotation with but limited axial displacement relative to the same and has |
