Portable, handheld, power tool
AssigneeBoar Tools, Inc.
InventorDavid A. Mirles
Life of this patent
Estimating the term…
Abstract
A portable, handheld, power tool is operable to rotate a tap in an opening in a workpiece to form an internal thread convolution in the opening. The power tool includes a chuck which holds the tap. Left and right handles extend in opposite directions from the chuck and are connected with a housing. A motor is disposed in one of the handles and is connected with the chuck by a drive mechanism. Manual actuation of a motor control lever mounted on the one handle initiates operation of the motor. Upon operation of the motor, force is transmitted through a drive mechanism to the chuck to rotate the chuck and the tap. Upon interruption of operation of the motor, the tap may be rotated under the influence of force which is manually applied to the handles.
Claims14
A portable, handheld, power tool for threading an opening in a workpiece with a tap, said power tool comprising:
- a housing;
- a first longitudinally extending handle having an inner end portion connected with said housing and an outer end portion which is spaced from said housing, said first handle having a manually engageable outer side surface with a longitudinal central axis extending through said housing and through said inner and outer end portions of said first handle, said first handle extends away from said housing to said outer end portion of said first handle in a first direction which is parallel to the longitudinal central axis of said manually engageable outer side surface of said first handle;
- a second longitudinally extending handle having an inner end portion connected with said housing and an outer end portion which is spaced from said housing, said second handle having a manually engageable outer side surface with a longitudinal central axis extending through said housing and through said inner and outer end portions of said second handle, said second handle extends away from said housing to said outer end portion of said second handle in a second direction which is opposite to the first direction and is parallel to the longitudinal central axis of said manually engageable outer side surface of said second handle;
- chuck means for holding a tap, said chuck means being connected with and rotatable relative to said housing about an axis which extends transverse to said longitudinal central axes of said manually engageable outer side surfaces of said first and second handles;
- a motor is disposed within said first handle and is enclosed by said manually engageable outer side surface of said first handle, said motor includes a rotor which is rotatable about an axis extending parallel to the longitudinal central axis of said manually engageable outer side surface of said first handle;
- and
- a control member connected with said motor and actuatable to effect operation of said motor.
A method of using a portable, handheld, power tool to thread an opening having a closed end disposed in a workpiece, said method comprising the steps of positioning a tap in a rotatable chuck of the power tool, aligning an axis of rotation of the chuck and the tap with a central axis of the opening in the workpiece while gripping first and second handles on the power tool, initiating operation of a motor in the power tool to rotate the chuck and tap relative to the workpiece while gripping the first and second handles, moving a leading end of the tap to a location adjacent to and spaced from the closed end of the opening, interrupting operation of the motor with the leading end of the tap adjacent to and spaced from the closed end of the opening, and thereafter, rotating the tap under the influence of force which is manually applied to the first and second handles while operation of the motor is interrupted to move the leading end of the tap further toward the closed end of the opening.
Dependencies are inferred from the claim text.