Patent ID: 8006777

Claim:
A hand-held power tool for driving a cutting or grinding working tool ( 12 ), comprising a running gear ( 13 ) having a support section ( 14 ), and a roller ( 15 ) rotatably supported on the support section ( 14 ) for displacing the power tool; and a locking device ( 20 ) having a locking position in which the roller ( 15 ) is secured to the support section ( 14 ) against rotation relative thereto, providing for a stable support of the power tool at a localized spot, and a release position in which the roller ( 15 ) is rotatable relative to the support section ( 14 ) for displacing the power tool, the locking device ( 20 ) having at least one locking element ( 21 a , 21 b ) provided on one end of the support section ( 14 ), and at least one counter-locking element ( 22 a , 22 b ) provided on one end of the roller ( 15 ) and engageable with the at least one locking element ( 21 a , 21 b ) of the support section ( 14 ) in a locking position of the locking device ( 20 ) for securing the roller ( 15 ) on the support section ( 14 ) against rotation relative thereto; and an annular groove ( 25 ) provided on another end of the roller ( 15 ) and engageable with the at least one locking element ( 21 a , 21 b ) of the support section ( 14 ) in the release position of the locking device ( 20 ) for enabling rotation of the roller ( 15 ) relative to the support section ( 14 ).