Claims
- 1. An eccentrically rotatable chair comprising:
- a base having a horizontal surface,
- central support means fixed on said base and having a vertical axis,
- an elongated non-extensible horizontal arm embracing and extending horizontally from from said central support means and having a longitudinal axis and an outer end spaced from said central support means, said horizontal arm being hollow and said central support means comprising a pivot post extending up into said hollow arm,
- single roller support means at said outer end of said arm rollable in all directions on said base and supporting said outer end of said arm,
- a seat disposed above and supported by said arm, and
- means connecting said arm with said central support means for rotation of said arm about the vertical axis of said central support means and for movement of said arm as a whole longitudinally relative to said central support means while restraining vertical movement of said arm and rotation of said arm about its longitudinal axis, said central support means and roller support means supporting said arm and seat and any load on said seat.
- 2. A chair according to claim 1, in which means for supporting said seat extends upwardly from said outer end of said arm, said seat being supported on said upwardly extending seat supporting means.
- 3. A chair according to claim 2, in which said seat is rotatable on said seat supporting means.
- 4. A chair according to claim 2, further comprising means for moving said seat vertically and for securing it in selected vertical position.
- 5. A chair according to claim 2, further comprising a second arm extending horizontally from an upper portion of said seat supporting means, an upright extending upwardly from said second arm and a back mounted on said upright.
- 6. A chair according to claim 5, in which said back is swivelly mounted on said upright for tilting in all directions.
- 7. A chair according to claim 1, in which said connecting means comprises a horizontal annular flange on said central support, parallel longitudinally extending channels in said arm receiving said flange and antifriction bearing means between said flange and said channels to restrain upward and downward movement of said arm and rotation of said arm about its longitudinal axis while providing for rotation of said arm about the vertical axis of said central support and for movement of said arm longitudinally.
- 8. A chair according to claim 1, in which means for supporting said seat comprises an upright extending upwardly from said outer end of said arm and a second shorter arm extending from said upright toward the axis of said central support, said seat being mounted on said second arm.
- 9. A chair according to claim 1, in which means for supporting said seat comprises an upright extending upwardly from said outer end of said arm, said seat being mounted on said upright and facing said axis of said central support.
- 10. A chair according to claim 1, in which said arm has a height at least equal to the height of said post and encloses said post.
- 11. A chair according to claim 10, in which means for supporting said chair comprises a vertical cylinder at the outer end of said arm, and a piston moveable axially in said cylinder, said seat being mounted on an upper end of said piston.
- 12. A chair according to claim 11, in which said seat is rotatable about the axis of said cylinder.
- 13. A chair according to claim 10, in which said means connecting said arm with said post comprises a flange on said post and a pair of lineal antifriction bearings extending horizontally in said arm and engaging said flange.
- 14. A chair according to claim 13, in which said post comprises a stationary core fixed to said base and a sleeve rotatable on said core, said flange being on said rotatable sleeve.
- 15. A chair according to claim 10, in which said means connecting said arm with said post comprises two flanges on said post spaced vertically from one another and two pairs of lineal antifriction bearings extending horizontally in said arm and spaced vertically from one another, said pairs of lineal bearings engaging said flanges respectively.
- 16. An eccentrically rotatable chair comprising:
- a base having a horizontal surface,
- central support means on said base and having a vertical axis,
- an elongated non-extensible horizontal arm embracing and extending from said central support means and having a longitudinal axis and an outer end spaced from said central support means, said horizontal arm being hollow and said central support means comprising a pivot post extending up into said hollow arm,
- a vertical cylinder fixed at the outer end of said horizontal arm,
- a seat post rotatable and vertically movable in said vertical cylinder,
- a seat mounted on and supported by said seat post,
- single roller support means at the outer end of said horizontal arm rollable in all directions on said base and supporting said outer end of said arm, said seat post and said seat, and
- means connecting said arm with said central support means for rotation of said arm about the vertical axis of said central support means and for movement of said arm as a whole longitudinally relatively to said central support means, while restraining rotation of said arm about its longitudinal axis and thereby maintaining said cylinder and seat post vertical.
- 17. An eccentrically rotatable chair according to claim 16, in which said single roller support means comprises a single spherical ball rotatable in a socket.
- 18. An eccentrically rotatable chair according to claim 16, in which said single roller support means comprises a cluster of balls.
- 19. An eccentrically rotatable chair according to claim 16, in which said pivot post has vertically spaced annular flanges thereon and in which said means connecting said arm with said central support means comprises lineal ball bearings set in longitudinally extending channels in said arm and engaging said flanges respectively.
- 20. An eccentrically rotatable chair according to claim 16, in which said pivot post has an annular flange thereon, and in which said means connecting said arm with said central support means comprises lineal ball bearings set in longitudinally extending channels in said arm and engaging said flange.
REFERENCE TO PRIOR APPLICATIONS
This application is a continuation-in-part of my U.S. application Ser. No. 095,450 filed Nov. 19, 1979 now patent No. 4,400,032 which was a continuation-in-part of my U.S. application Ser. No. 893,685 filed Apr. 5, 1978 (now abandoned).
US Referenced Citations (8)
Foreign Referenced Citations (1)
Number |
Date |
Country |
260053 |
Jul 1949 |
CHX |
Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
95450 |
Nov 1979 |
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Parent |
893685 |
Apr 1978 |
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