Friction type continuous speed variation device

• US 3,209,606 A
• Filed: 09/16/1963
• Issued: 10/05/1965
• Est. Priority Date: 09/20/1962
• Status: Expired due to Term

• Current Assignee: Sota Yamamoto
• Original Assignee: Sota Yamamoto
• Inventors: SOTA YAMAMOTO
• Application Number:
  US04/309,270
• Time in Patent Office: 750 Days
• US Class Current: 476/39
• CPC Class Codes: F16H 15/28 with external friction surface

Claims

1. A FRICTION TYPE CONTINUOUS SPEED VARIATION DEVICE COMPRISING:

A FRAME, A PAIR OF FRICTION WHEELS, MEANS SUPPORTING THE WHEELS IN SPACED ALIGNED RELATION IN SAID FRAME FOR ROTATION ABOUT A COMMON AXIS, SAID WHEELS HAVING PERIPHERIES WHICH ARE PART-SPHERICALLY CONCAVE, A PLURALITY OF HEMISPHERICAL IDLERS EACH OF WHICH ARE ADAPTED FOR INDIVIDUAL ROTATION, THE IDLERS EACH BEING SIMULTANEOUSLY IN CONTACT WITH THE PART-SPHERICAL PHERICAL SURFACES OF THE TWO FRICTION WHEELS AT A POSITON MIDWAY BETWEEN SAID PAIR OF FRICTION WHEELS;

A HOLDER FOR EACH IDLER, MEANS SUPPORTING EACXH IDLER FROM THE ASSOCIATED HOLDER FOR ROTATION ABOUT AN AXIS PARALELL TO SAID WHEELS AND FOR COMMON TILTING MOVEMENT WITH SAID HOLDER ABOUT AN AXIS PERPENDICULAR TO SAID WHEELS, MEANS FOR TILTING AND ADJUSTING EACH OF THE HODLERS WITH RESPECT TO THE FRAME WHICH IN TURN TILTS THE ASSOCIATED HEMISPHERICAL IDLER IN THE PERIPHERAL SURFACE OF THE IDLER WHILE THE IDLER REMAINS IN CONTACT WITH SAID PAIR OF FRICTION WHEELS, THE LATTER MEANS INCLUDING MEANS SUPPORTING EACH HOLDER SUCH THAT IT IS DISPLACEABLE AT ITS PERIPHERY RELATIVE TO THE FRAME ONLY IN THE DIRECTION OF THE FIRST SAID AXIS, AND OPERATING MEANS ENGAGING SAID MEANS WHICH TILTS AND ADJUSTS THE HOLDERSFOR OPERATING THE SAME, SAID OPERATING MEANS INCLUDING A MECHANISM WHICH IS ACCESIBLE FROM OUTSIDE OF THE FRAME, SAID HOLDERS EACH BEING PROVIDED WITH AN ARC-SHAPED TOOTHED PORTION ON THE OUTER PERIPHERAL SURFACE THEREOF ON A SIDE OPPOSITE THE ASSOCIATED HEMISPHERICAL IDLER, SAID MEANS SUPPORTING EACH HOLDER COMPRISING A RACK-SHAPED TOOTHED PORTION EXTENDING IN THE DIRECTION OF THE FIRST SAID AXIS AND IN TOOTHED ENGAGEMENT WITH THE TOOTHED PORTION OF THE ASSOCIATED HOLDER, AN ANNULAR SEAT ENCIRCLING SAID FRICTION WHEELS, HEMISPHERICAL IDLERS AND HOLDERS, SAID RACK-SHAPED TOOTHED PORTION BEING SUPPORTED ON THE INNER SURFACE OF SAID ANNULAR SEAT, SAID ANNULAR SEAT BEING SUPPORTED IN THE FRAME FOR MOVEMTN ONLY IN THE DIRECTION OF THE FIRST SAID AXIS AND BEING RELATED WITH SAID OPERATING MEANS SUCH THAT BY MOVING SAID SEAT BY SAID OPERATING MEANS, EACH SAID HOLDER IS ROLLED ON SAID RACK-SHAPED TOOTHED PORTION AND THE AXIS OF SAID HEMISPHERICAL IDLER IS TILTED AND ADJUSTED.