. P27871.A04
`
`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 fern—rotating 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 fer—eentrelling fastening
`
`operation; and
`
`a controller that controls for—eentrelling on and off of the motor, and having
`
`a normal fastening mode and a tight fastening mode; wherein
`
`a time period term sensor, which senses time periods from a time when
`
`the main switch is switched on to a time when the main switch is switched off and
`
`from a time when the main switch is switched off to a time when the main switch
`
`
`is switched on next
`
`fer—sensing4errns—ef—ewitetiing—en—and—efi—ef—the—main—switeh
`
`is further comprised; and
`
`
`
`the controller gives transition to the tight fastening mode from the normal
`
`fastening mode when eerrespending—te the time period from the time when the
`
`
`
`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 fern—rotating 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 fer—eentrelling fastening
`
`operation; and
`
`a controller that controls for—eentrelling on and off of the motor, and having
`
`a normal fastening mode and a tight fastening mode; wherein
`
`a time period term sensor, which senses time periods from a time when
`
`the main switch is switched on to a time when the main switch is switched off and
`
`from a time when the main switch is switched off to a time when the main switch
`
`
`is switched on next
`
`fer—sensing4errns—ef—ewitetiing—en—and—efi—ef—the—main—switeh
`
`is further comprised; and
`
`
`
`the controller gives transition to the tight fastening mode from the normal
`
`fastening mode when eerrespending—te the time period from the time when the
`
`
`
`. P27871 .A04
`
`main switch is switched off to the time when the main switch is switched on next
`
`term sensed by the time period term sensor is shorter than a first predetermined
`
`time period.
`
`2. (Currently Amended) The rotary impact. tool in accordance with claim 1,
`
`wherein
`
`when a time period from a time when the main switch is switched on first
`
`to a time when the main switch is switched off a—term—ef—swfiehmg—enef—the—mam
`
`
`switch—at—first is shorter than a second predetermined reference time period, the
`
`controller restricts transition to the tight fastening mode from the normal fastening
`
`
`mode.
`
`3. (Currently Amended) The rotary impact tool in accordance with claim 1,
`
`wherein
`
`when the main switch is switched on in a predetermined time period term
`
`after completing a tight fastening operation in the tight fastening mode,
`
`the
`
`controller gives transition to the tight fastening mode, again.
`
`4. (Currently Amended) The rotary impact tool in accordance with claim 1,
`
`wherein
`
`the controller repeats tight fastening operation while the switching on of
`
`the main switch is maintained ip while the tight fastening mode.
`
`
`
`.P27871.A04
`
`5. (Currently Amended) The rotary impact tool in accordance with claim 1,
`
`wherein
`
`the controller varies a quantity of impact energy in the tight fastening
`
`mode corresponding to a time period from a time when the main switch is
`
`switched on first to a time when the main switch'is switched off term—ef—switehing
`
`en—ef—the—main—switsh—at—first or corresponding to a total number of impact blows
`
`of the hammer in the time period from a time when the main switch is switched
`
`on first to a time when the main switch is switched off temq—ef—switehing—en—ef—the
`
`6. (Currently Amended) The rotary impact tool in accordance with claim 4,
`
`wherein
`
`the controller gradually reduces the quantity of impact energy in the tight
`
`fastening operation when the tight
`
`fastening operations are continuously
`
`repeated.
`
`7. (Currently Amended) The rotary impact tool in accordance with claim 2,
`
`wherein
`
`when the main switch is switched on in a predetermined time period term
`
`after completing a tight fastening operation in the tight fastening mode,
`
`the
`
`controller gives transition to the tight fastening mode, again.
`
`
`
`. P27871 .A04
`
`8. (Currently Amended) The rotary impact tool in accordance with claim 2,
`
`wherein
`
`the controller repeats tight fastening operation while the switching on of
`
`the main switch is maintained i_n while the tight fastening mode.
`
`9. (Currently Amended) The rotary impact tool in accordance with claim 2,
`
`wherein
`
`the controller varies a quantity of impact energy in the tight fastening
`
`mode corresponding to a time period from a time when the main switch is
`
`switched on first to a time when the main switch is switched off term—ef—switehing
`
`en—ef—themain—switeh—at—first or corresponding to a total number of impact blows
`
`of the hammer in the time period from a time when the main switch is switched
`
`on first to a time when the main switch is switched off term-ef—switching—en—ef—the
`
`10. (Currently Amended) The rotary impact tool in accordance with claim
`
`3, wherein
`
`the controller repeats tight fastening operation while the switching on of
`
`the main switch is maintained in while the tight fastening mode.
`
`11. (Currently Amended) The rotary impact tool in accordance with claim
`
`4, wherein
`
`
`
`.P27871 .A04
`
`the controller varies a quantity of impact energy in the tight fastening
`
`mode corresponding to a time period from a time when the main switch is
`
`switched on first to a time when the main switch is switched off tem—ef—switehing
`
`en—efthe—main—switeh—at—first or corresponding to a total number of impact blows
`
`of the hammer in the time period from a time when the main switch is switched
`
`on first to a time when the main switch is switched off tenn—ef—switehing—en—ef—the
`
`12. (Currently Amended) The rotary impact tool in accordance with claim
`
`5, wherein
`
`the controller gradually reduces the quantity of impact energy in the tight
`
`fastening operation when the tight
`
`fastening operations are continuously
`
`repeated.
`
`
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