초록 ▼

A power sanding machine ( 10 ) has three circumferentially spaced cogged belts ( 40 ) to drive three discs ( 52 ) rotatably mounted to an inner bowl ( 30 ) which is rotatably mounted to a housing ( 12 ), which in turn is connected to an operating handle ( 14 ). Mechanical lock can rotationally affix

A power sanding machine ( 10 ) has three circumferentially spaced cogged belts ( 40 ) to drive three discs ( 52 ) rotatably mounted to an inner bowl ( 30 ) which is rotatably mounted to a housing ( 12 ), which in turn is connected to an operating handle ( 14 ). Mechanical lock can rotationally affix the inner bowl ( 30 ) to the housing to circumferentially position a pulley at the left or right edge ( 326, 322 ) of the sanding machine or at the front end ( 330 ) of the sanding machine.

대표청구항 ▼

1. A power cleaning and sanding machine for a wood floor comprising:a housing;a motor mounted to said housing and having a drive shaft;an inner housing member positioned within said housing and rotatably mounted on said drive shaft to allow rotation of said inner housing member with respect to both

1. A power cleaning and sanding machine for a wood floor comprising:a housing;a motor mounted to said housing and having a drive shaft;an inner housing member positioned within said housing and rotatably mounted on said drive shaft to allow rotation of said inner housing member with respect to both said housing and drive shaft;a plurality of pulleys circumferentially spaced about said drive shaft, operably connected to said drive shaft, and rotatably connected to said inner housing member;each pulley constructed to have a abrasive member mounted thereon;said inner housing being selectively rotationally affixed to said housing by a mechanical lock that is able to lock a pulley in a circumferentially selected position about the drive shaft. 2. A power cleaning and sanding machine as defined in claim 1 further comprising:said mechanical lock being in the form of a pin movable between a lower position extendable through an aperture in the housing and engaging a recess in the inner housing and an upper position where it is removed from the recess in the inner housing. 3. A power cleaning and sanding machine as defined in claim 2 further comprising:said recess in the inner housing circumferentially positioned about the inner housing such that when said pin engages said recess, one of said pulleys is positioned toward one of the right or left sides of the housing member. 4. A power cleaning and sanding machine as defined in claim 3 further comprising:said housing having a first and second recess with said first recess, when engaged with the pin locks one pulley at the left side of the housing and with the second recess when engaged with the pin locks one pulley at the right side of the housing member. 5. A power cleaning and sanding machine as defined in claim 4 further comprising:said housing having a third recess with said third recess when engaged with the pin locks the pulley at the front end of the housing. 6. A power cleaning and sanding machine as defined in claim 2 further comprising:said housing recess in the inner housing circumferentially positioned about the inner housing such that when said pin engages said recess, one of said pulleys is positioned at the front end of said housing. 7. A power cleaning and sanding machine as defined in claim 1 further comprising:said mechanical lock being constructed to selectively lock any of the pulleys to be positioned at the left or right sides of said housing. 8. A power cleaning and sanding machine as defined in claim 1 further comprising:said mechanical lock being constructed to selectively lock any of said pulleys at the left or right side or front end of said housing. 9. A power cleaning and sanding machine for a wood floor comprising:a housing;an operable handle extending behind the rear end of said housing;a motor mounted to said housing and having a centrally positioned downwardly extending drive shaft;an inner housing member positioned within said housing and rotatably mounted on said drive shaft to allow rotation of said inner housing member with respect to both said housing and drive shaft;a plurality of pulleys circumferentially spaced about said drive shaft and rotatably connected to said inner housing member;the axis of rotation of each pulley being parallel to the axis of rotation of said drive shaft;each pulley constructed to have abrasive elements mounted thereon;a plurality of belts, each belt mounted about a respective one pulley and engageably driven by the drive shaft;a mechanical lock constructed to selectively lock the inner housing against rotation with respect to said housing;said inner housing member being freely rotatable with respect to said housing when said mechanical lock is disengaged and for affixing a pulley at a side edge of said housing when engaged to affix the inner housing member with the housing. 10. A power cleaning and sanding machine as defined in claim 9 further comprising:said mechanical lock being in the form of a pin movably between a lo wer position extendable through an aperture in the housing and engaging a recess in the inner housing and an upper position where it is removed from the recess in the inner housing. 11. A power cleaning and sanding machine as defined in claim 10 further comprising:said recess in the inner housing circumferentially positioned about the inner housing such that when said pin engages said recess, one of said pulleys is positioned toward one of the right or left sides of the housing member. 12. A power cleaning and sanding machine as defined in claim 10 further comprising:said housing having a first and second recess with one recess when engaged with the pin locks one pulley at the left side of the housing and when the second recess when engaged with the pin locks one pulley at the right side of the housing member. 13. A power cleaning and sanding machine as defined in claim 12 further comprising:said housing having a third recess with said third recess when engaged with the pin locks the pulley at the front end of the housing. 14. A power cleaning and sanding machine as defined in claim 10 further comprising:said housing recess in the inner housing circumferentially positioned about the inner housing such that when said pin engages said recess, one of said pulleys is positioned at the front end of said housing. 15. A power cleaning and sanding machine as defined in claim 9 further comprising:said mechanical lock being constructed to selectively lock any of the pulleys to be positioned at the left or right sides of said housing. 16. A power cleaning and sanding machine as defined in claim 9 further comprising:said mechanical lock being constructed to selectively lock any of said pulleys at the left or right side or front end of said housing.