Hand-held machine tool
February 9, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPower tool safety mechanism Motor braking arrangement and method Electric tool, particularly a handtool, with torque control Electric tool with torque monitor Commutator motor and improved brush construction for use in portable machine tools Mechanical quill having selective braking capability Drill braking system Hand-held hammer tool Motor-driven hand tool with braking torque device Variable speed DC motor controller apparatus particularly adapted for control of portable-power tools InventorsAssigneeApplicationNo. 10297223 filed on 02/09/2002US Classes:173/2, AUTOMATIC CONTROL OF POWER OPERATED MEANS173/176, Drive means responsive to torque or speed condition173/178, Having torque responsive clutch173/217, Electric motor318/245, Universal or A.C.-D.C. motors310/230, Circumferential brush shifting on reversal408/6, Responsive to condition of tool or tool-drive175/394, With helical-conveying portion408/9, To control tool rotation318/376, Regenerative310/103, Magnetic field type318/281, Periodic- or intermittent-reversing173/48, Adjustable to impacting device173/4, Tool advance causing or controlling means318/362, BRAKING173/109Rotated by hammer head or drive for hammer headExaminersPrimary: Smith, Scott A.Attorney, Agent or FirmForeign Patent References
International ClassB25D 16/00AbstractThe invention is based on a hand power tool having an electric motor (12) located in a housing (10), via which an insertable tool (16) situated in a tool mount (14) is capable of being driven in a rotating manner, and having a safety device (18) with which a characteristic value for an occurrence of uncontrolled blockage of the insertable tool (16) can be detected via a sensor unit (20), and the movement of the housing (10) can be decelerated.It is proposed that the safety device (18) is formed at least partially by a motor control unit (22), via which the electric motor (12) can be actively decelerated when an occurrence of uncontrolled blockage of the insertable tool (16) is detected.Field of SearchAUTOMATIC CONTROL OF POWER OPERATED MEANSDrive means responsive to torque or speed condition Responsive to torque or speed condition of drive With additional control by means sensing condition of advance means Having torque responsive clutch Having torque sensor Electric motor Responsive to condition of tool or tool-drive To control tool rotation Including means to move tool along tool-axis Double-acting ratchet TOOL OR TOOL-SUPPORT WITH TORQUE-APPLYING RATCHET | |
