US Patent: 3,161,073
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| Ball Screw Mechanism
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Patentees:
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| Hans W. Deutsch (exact or similar names) - Clarendon Hills, DuPage County, IL |
| Dale M. Price (exact or similar names) - Hinsdale, Cook and DuPage Counties, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 02, 1961 |
| Granted: |
Dec. 15, 1964 |
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Joel Havens
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Description: |
| Claim:
A ball screw mechanism comprising a screw member and a nut member each having a helical groove which grooves together define a helical passage, a train of balls in said passage permitting transmission of force between the members, an opening formed in the wall of said nut member so as to extend at an inclination relative to the axis of the mechanism between the ends of less than one helical groove convolution, and a ball return member fixedly mounted in said opening so as to be disposed within the confines of the outer diameter of said nut and having a wall portion defining a ball return passage for transferring the balls between said ends and over an intervening screw crest whereby said ball return member and said less than one helical groove convolution together define an endless path for the train of balls, said ball return member being disposed closely adjacent said intervening screw crest and said wall portion having an opening therein extending substantially along the length of the ball return in a radially inner portion thereof facing said screw member, said opening being less wide than the diameter of said balls whereby when due to gravity the balls are urged toward said screw the edges of said wall portion adjacent said opening will suspend the balls out of contact with the crest of said intervening screw thread while yet permitting them to move in a path closely adjacent said crest as the balls are directed thereover. |
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