Patent ID: 6746321
Filing Date: 2004-06-08
Classification: B24B

Abstract:
A grinding power tool, comprising a housing (1); a motor-driven grinding plate (2) supported in the housing (1) and having a plurality of suction openings (3); a suction channel (4) provided in the housing (1) for connecting the suction openings (3) with a vacuum source (5); at least one suction relief valve associated with the suction channel (4) for controlling pressure in the suction channel (4); and a connection union (3) arranged at a connection end region (10) of the suction channel (4) for releasably connecting the suction channel (4) with one of a hose (8), which connects the suction channel (4) with the vacuum source (5), and a filter bag (12), wherein the suction relief valve comprises a through-opening (14) formed in the connection union (3) and located outside of the power tool, and a resilient sealing member (15) for sealingly closing the through-opening (14) in an idle position of the power tool, the sealing member (15) being automatically pulled in an interior of the connection union (9) against an internal biasing force of the sealing member (15) when, upon actuation of the vacuum source (5), a predetermined pressure difference between pressure in the suction channel (4) and a surrounding pressure is reached.