Patent ID: 6116864
Filing Date: 2000-09-12
Classification: A01G,A47L,F01P,F02B,F04D

Abstract:
A hand-held vacuum/blower device comprising:a housing having an interior;a drive motor arranged in said interior of said housing;said drive motor having a drive shaft;a blower spiral connected to said housing;a blower wheel arranged in said blower spiral and coupled to said drive shaft;a blower spiral having a first and a second radial end faces and each one of said radial end faces having at least one air inlet opening, said at least one air inlet opening being 5/7 the size of said blower wheel and passing a cooling air through said at least one air inlet opening;a venting wheel coupled to said drive shaft for conveying substantially all of the cooling air from the exterior of said housing to said drive motor in said interior of said housing;said blower wheel having a hub and a wall connected to said hub and extending to a periphery of said blower wheel;said wall having a first end face facing said first radial end face and a second end face facing said second radial end face;said blower wheel comprising first and second vanes, wherein said first vanes are connected to said first end face of said wall and said second vanes are connected to said second end face of said wall;said first radial end face being a part of said housing and said at least one air inlet opening of said first radial end face connecting said interior of said housing to a suction area of said blower wheel, wherein said first vanes are configured to convey substantially all of the cooling air, after having flown past said drive motor for cooling, from said interior into said blower spiral where the cooling air is mixed with the working air stream generated by the blower wheel.