P27872.Al l
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`CLAIM AMENDMENTS
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`This listing of claims will replace all prior versions, and listings, of claims in the
`
`application:
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`1. (Currently Amended) A rotary impact tool comprising:
`
`a rotary driving mechanism including a motor that rotates a driving shaft;
`
`a hammer engaged with the driving shaft;
`
`an output shaft to which a driving force is applied by impact blow of the hammer;
`
`a main switch operated by a user that controls a fastening operation;
`
`a torque setting switch used by a user that sets a fastening torque;
`
`a torque calculator that calculates a fastening torque;
`
`a controller that controls turning on and off of the motor based on switching on
`
`and off of the main switch, an output of the torque calculator and the fastening torque set
`
`in the torque setting switch, and having a normal fastening mode and a tight fastening
`
`mode;
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`a rotation angle sensor that senses a rotation angle of the output shaft to which
`
`rotation force due to impact blow of the hammer is applied or a rotation angle of a shaft
`
`of the motor; and
`
`a tight fastening mode setting switch that sets the tight fastening mode in which a
`
`fastening member is fastened further to stop fastening of the fastening member in normal
`
`fastening torque; wherein
`
`a fastening time period sensor for measuring on time and off time of the main
`
`switch is connected in parallel with the main switch;
`
`
`
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`
`
`
`CLAIM AMENDMENTS
`
`This listing of claims will replace all prior versions, and listings, of claims in the
`
`application:
`
`1. (Currently Amended) A rotary impact tool comprising:
`
`a rotary driving mechanism including a motor that rotates a driving shaft;
`
`a hammer engaged with the driving shaft;
`
`an output shaft to which a driving force is applied by impact blow of the hammer;
`
`a main switch operated by a user that controls a fastening operation;
`
`a torque setting switch used by a user that sets a fastening torque;
`
`a torque calculator that calculates a fastening torque;
`
`a controller that controls turning on and off of the motor based on switching on
`
`and off of the main switch, an output of the torque calculator and the fastening torque set
`
`in the torque setting switch, and having a normal fastening mode and a tight fastening
`
`mode;
`
`a rotation angle sensor that senses a rotation angle of the output shaft to which
`
`rotation force due to impact blow of the hammer is applied or a rotation angle of a shaft
`
`of the motor; and
`
`a tight fastening mode setting switch that sets the tight fastening mode in which a
`
`fastening member is fastened further to stop fastening of the fastening member in normal
`
`fastening torque; wherein
`
`a fastening time period sensor for measuring on time and off time of the main
`
`switch is connected in parallel with the main switch;
`
`
`
`
`
`
`
`ll
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`l lll
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`P27872.All
`
`
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`in the tight fastening mode, the impact blows of the hammer are performed in—a
`
`predetefininedtem until a rotation angle of the output shaft reaches to a predetermined
`
`angle as a tight fastening operation;
`
`when the tight fastening mode setting switch is switched on,
`
`the controller
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`continuously drives the rotary driving mechanism so as to perform the tight fastening
`
`operations continuously;
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`the torque calculator calculates the fastening torque based on an output of the
`
`rotation angle sensor;
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`the controller stops driving of the motor when the rotation angle obtained from an
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`output of the rotation angle sensor becomes equal to or larger than a predetermined
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`reference value in the tight fastening mode; and
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`when a time period between a time when the main switch is switched off and a
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`time when the main switch is switched on again by the user measured by the fastening
`
`time period sensor is shorter than a predetermined time period, after the driving of the
`
`motor is off due to completion of the normal fastening operation, the controller performs
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`the tight fastening operation, although the tight fastening mode setting switch is switched
`
`off.
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`2. (Canceled)
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`P27872.Al l
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`3. (Previously Presented) The rotary impact tool in accordance with claim 1,
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`further comprising:
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`a tight fastening angle setting switch that sets or varies the predetermined
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`reference value set in the tight fastening mode.
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`4. (Canceled)
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`5. (Previously Presented) The rotary impact tool in accordance with claim 1,
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`wherein
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`the controller increases a level of phase of the fastening torque set in the torque
`
`setting switch by one, when a number of tight
`
`fastening operations reaches a
`
`predetermined number of times.
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`6. (Canceled)
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`7. (Previously Presented) The rotary impact tool in accordance with claim 3,
`
`wherein
`
`the controller increases a level of phase of the fastening torque set in the torque
`
`setting switch by one, when a number of tight
`
`fastening operations reaches a
`
`predetermined number of times.
`
`8. (Canceled)
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`
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`P27872.All
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`9. (Currently Amended) A rotary impact tool comprising:
`
`a rotary driving mechanism including a motor that rotates a driving shaft;
`
`a hammer engaged with the driving shaft;
`
`an output shaft to which a driving force is applied by impact blow of the hammer;
`
`a main switch operated by a user that controls a fastening operation;
`
`a torque setting switch used by a user that sets a fastening torque;
`
`a torque calculator that calculates a fastening torque;
`
`a controller that controls turning on and off of the motor based on switching on
`
`and off of the main switch, an output of the torque calculator and the fastening torque set
`
`in the torque setting switch, and having a normal fastening mode and a tight fastening
`
`mode; and
`
`a tight fastening mode setting switch that sets the tight fastening mode where a
`
`fastening member is fastened further to stop fastening of the fastening member in normal
`
`fastening torque; wherein
`
`a fastening time period sensor for measuring on time and off time of the main
`
`switch is connected in parallel with the main switch;
`
`the tight fastening mode setting switch is provided on an exterior surface of a
`
`housing thereby enabling to be touched directly by an operator in fastening operations;
`
`in the tight fastening mode, the—hapaet—blews—ef—the—hamner—are—perfemed—in—a
`
`predetermined—team a predetermined number of impact blows of the hammer are
`
`performed as a tight fastening operation;
`
`
`
`
`
` E
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`E E EE E E EE
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`
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`P27872.All
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`when the tight fastening mode setting switch is switched on,
`
`the controller
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`continuously drives the rotary driving mechanism so as to perform the tight fastening
`
`operations continuously;
`
`when a number of the impact blows of the hammer corresponding to the fastening
`
`torque set in the torque setting switch is performed, the controller stops driving of the
`
`motor in the tight fastening mode; and
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`when a time period between a time when the main switch is switched off and a
`
`time when the main switch is switched on again by the user measured by the fastening
`
`time period sensor is shorter than a predetermined time period, after the driving of the
`
`motor is off due to completion of the normal fastening operation, the controller performs
`
`the tight fastening operation, although the tight fastening mode setting switch is switched
`
`off.
`
`10. (Previously Presented) The rotary impact tool in accordance with claim 9,
`
`wherein
`
`the controller increases a level of phase of the fastening torque set in the torque
`
`setting switch by one, when a number of tight
`
`fastening operations reaches a
`
`predetermined number of times.
`
`
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