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Title: Motor driven abrasive device with rotating, cylindrical motor drum housing
Claims: What is claimed is: 1. A motor driven abrading device, which device comprises; a. a housing having at least one side thereof partially open, 1. a handle secured on said housing and forming a first handling means, b. an apertured, non-rotatable shaft mounted within said housing, 1. a stator mounted on said shaft and being fixed against rotation with respect thereto, c. a cylindrical, rotatable motor drum housing, having end plates thereon, journaled on said shaft for rotation about the axis thereof, and adapted to selectively extend through said at least one partially open side, 1. a sheet of abrasive material surrounding the periphery of said cylindrical, rotatable motor drum housing, 2. fastening means detachably securing each end of said sheet of abrasive material to said cylindrical, rotatable motor drum housing, d. said cylindrical, rotatable motor drum housing and said stator forming a motor, 1. a source of power connected to said motor for rotating said cylindrical, rotatable motor drum housing about an axis on which said abrading sheet is detachably secured. 2. A motor driven abrading device as defined in claim 1; wherein a. said motor is an air driven motor, b. said source of power, connected to said motor for rotating said hollow, cylindrical, rotatable motor drum housing, is air under pressure. 3. A motor driven abrading device as defined in claim 2 wherein a. said stator has circumferentially spaced, radial slots formed therein, each which slot receives a slidable vane therein, each which vane forms a seal between said stator and said hollow, cylindrical, rotatable motor drum housing. 4. An abrading device as defined in claim 1; wherein a. a housing portion is detachably engaged with said housing, b. lever and recess means normally being inter-engaged between said housing and said housing portion, 1. a manually operated lever connected to said lever engaging said recess means to cause relative movement between said housing and said housing portion, c. contour guide means connected to said housing portion which contour guide means has an opening formed therein intermediate the ends thereof to receive said hollow, cylindrical, rotatable motor drum housing therethrough, 1. said housing, mounting said cylindrical, rotatable motor drum housing being manually operable by said manually operated lever to maintain said motor drum housing within said opening in said contour guide means in adjusted relation with respect to the lower surface of said contour guide means. 5. An abrading device as defined in claim 4; wherein a. interengaging means interconnects said housing and said housing portion, b. said manually operated lever being adapted to move said lever and recess means to engage said housing and said housing portion when moved into one position and to disengage said housing and said housing portion when moved into another position. 6. An air driven motor, which motor comprises; a. a first housing, which housing has air passages formed therein, b. an apertured, non-rotatable shaft mounted within said first housing, said aperture being connected to one of said passages, 1. a stator mounted on said shaft and being fixed against rotation with respect thereto, c. a hollow, cylindrical, rotatable motor drum housing, having end plates thereon, journaled on said shaft for rotation about the axis thereof, 1. said stator having circumferentially spaced, radial slots formed therein, each which slot receives a slidable vane therein, each which vane forms a seal between said stator and said hollow cylindrical, rotatable motor drum housing, 2. each said slidable vane, when in one position, forms a chamber between said hollow, cylindrical, rotatable motor drum housing and said stator to receive air under pressure thereinto, 3. one of said end plates having a first air inlet passage formed therein which air inlet passage is in fluid communication with one of said passages in said housing to direct air, under pressure, radially inward of said vanes for a predetermined arcuate travel, 4. one of said end plates having a second air inlet port formed therein and connecting to one of said passages in said housing to direct air under pressure into said chamber intermediate one of said vanes and the inner diameter of said hollow, cylindrical rotatable motor drum housing so that the reaction force of the air, under pressure, on said vane will cause said cylindrical, rotatable motor drum housing to rotate in a selected direction, 5. one of said end plates having an air outlet port formed therein in circumferentially spaced relation to said second air inlet port, so as to direct air under pressure from said chamber between one of said vanes and said cylindrical, rotatable motor drum housing, when said rotatable drum housing has moved through a predetermined arcuate movement, 6. a source of air under pressure directed into and through said inlet openings in said end plate to said stator, 7. valve means for controlling the flow of said air under pressure through said passages in said housing to said air inlet ports. 7. An air driven motor as defined in claim 6; wherein a. the one of said end plates which has said first air inlet passage formed therein is the same end plate which has said second air inlet passage formed therein and an air outlet port formed therein. 8. An air driven motor as defined in claim 6; wherein a. said vanes which are radially slidable in said stator, each said vane having an arcuate inner end surface to admit air under pressure radially inward of said vanes for a predetermined arcuate travel, b. the outer end of each said vane being of a shape to form a complementary seal with the inner diameter of the hollow, cylindrical, rotatable motor drum housing so as to form an air driven motor. 9. An air driven motor as defined in claim 6; wherein a. said hollow, cylindrical, rotatable motor drum housing has an abrading sheet mounted on the cylindrical surface thereof, b. means securing said sheet of abrading material to the periphery of said cylindrical, rotatably motor drum housing. 10. An air driven motor as defined in claim 9; wherein a. said first housing has laterally spaced apart abrasive sheet guide means secured to the inner surface of said housing a spaced distance outward from and in lateral alignment with said sheet of abrasive material on said motor drum housing. 1. said abrasive sheet guide means is of hardened material. 11. An air driven motor as defined in claim 6; wherein a. said source of air, under pressure, is connected in fluid communication with said apertured, non-rotatable shaft to direct air therethrough into said hollow, cylindrical, rotatable drum housing to direct air, under pressure, against at least one said vane to form said motor. Other info: Inventors: Waters, Warren W. Application Number: 624112 Filing Date: 1975-10-20 Publication_date: 1976-10-12 Assignee: Primary Class(es): 451/358 418/175 Other Classes: US Patent Ref:
Other Refs: Primary Examiner: Jones, Jr., James L. Assistant Examiner: Attorney: Keith; Wayland D. |
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