US Patent: 5,174,742
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| Rotary Air Motor with Curved Tangential Vanes
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Patentee:
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| Gordon A. Putney (exact or similar names) - Lake Geneva, WI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 03, 1992 |
| Granted: |
Dec. 29, 1992 |
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Stan Schulz
Snap-On Tools Company History
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Description: |
| Emrich & Dithmar - patent attorneys
Abstract
A rotary air motor has a stator with a cylindrical inner surface defining a chamber and a cylindrical rotor mounted by hub structure for eccentric rotation within the chamber and end plates closing the opposite ends of the chamber and spaced from the adjacent ends of the rotor by end clearance spaces. The rotor has a plurality of arcuate slots therein extending the length thereof and respectively slidably receiving arcuate vanes arranged so that when the rotor is rotated the outermost edges of the vanes are centrifugally urged into sliding engagement with the inner surface of the stator. The hub structure includes a cylindrical shaft extending coaxially through the rotor and hub members having cylindrical outer surfaces intersecting each of the slots, with the vanes being so dimensioned that each vane tangentially engages the cylindrical outer surfaces of the hub members along substantially the entire axial extend of the end clearance spaces in all positions of the vane, thereby to provide an effective seal between the vanes and the hub structure. The end clearance spaces may be substantially greater than the clearance between the end plates and the adjacent axially spaced ends of the vanes.
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