Title of Invention

"MECHANICAL VARIABLE-SPEED DRIVE"

Abstract

In a mechanical variable-speed drive, an epicyclic gear (4) has a sun gear (8) connected to an input shaft (3), a planet carrier (13) connected to an output shaft (2), an outer ring gear (24), and a number of planet gears (17) connected frictionally to the sun gear (8) and the ring gear (24); the ring gear (24) being defined by a movable ring (26) movable to and from a fixed, ring (25) so as to control the radial position, of the planet gears (17) with respect to the sun gear (3) and so vary the velocity ratio of the input shaft (3) and output shaft (2); the movable ring (26) being connected to a further fixed ring (6) by a screw compline," (27) for enabling the movable ring (26) to rotate about and translate along a longitudinal axis (5) of the variable-speed drive. (Figure 2)

Full Text

DESCRIPTION (COMPLETE) OCR NOT PREPARE DUE TO PRINT PROBLEM claim: 1) A mechanical variable-speed drive comprising an epicyclic gear (4) interposed between an input shaft (2) and an output shaft (2) mounted to rotate about a given longitudinal first axis (5) at a first and second angular velocity respectively wherein the epicyclic gear (4) haveing a sun gear (8) which is angularly- fixed to said input shaft (3), a planet carrier (13) angularly-fixed to said output shaft (2), a number of planet gears (17), each having a respective longitudinal second axis (19) parallel to said first axis (5), and an outer ring gear (24) coaxial with the first axis (5), said planet gears (17) being connected frictionally to said sun gear (8) and to said ring gear (24) to rotate about the respective said second axes (19) and about said first axis (5) so as to rotate said planet carrier (13) about the first axis (5), and said ring gear (24) an angularly and axially fixed first ring (25), and a second ring (26) movable to and from said first ring (25) to control the radial position of said second axes (19) with respect to said first axis (5) and so vary the velocity ratio of said input shaft (3) and said output shaft (2); a body (6) extending at least partly about said second ring (26) and connecting means (27) for connecting said second ring to said body (6) and enabling the second ring (26) to move along said first axis (5) when the second ring (26) is rotated about the first axis (5); wherein said connecting means (27) are screw connecting means. 2) A mechanical variable-speed drive as claimed in claim 1, wherein said connecting means (27) are threaded connecting means. 3) A mechanical variable-speed drive as claimed in claim 1, wherein said connecting means (27) are recirculating-ball connecting means. 4) A mechanical variable-speed drive as claimed in claim 3, wherein said connecting means (27) CD have tracks (29) coiling along and about said first axis (5), said tracks (29) being formed respectively on an inner surface of said body (6) and on an outer surface of said second ring (26), and being positioned facing each other to define a channel (30); and a number of balls (31) distributed along said channel (30). 5) A mechanical variable-speed drive as claimed in claim 4, wherein said connecting means (27) also have a further channel (33) for recirculating said balls (31) along said channel (30). 6) A mechanical variable-speed drive as claimed in any one of the foregoing claims and also haveing an outer tubular casing (6); said body (6) being formed in one piece with said casing (6). 7) A mechanical variable-speed drive as claimed in any one of claims 1 to 5 and also haveing aneuter tubular casing (6); said body (6) being connected in axially- and angularly-fixed manner to said casing (6). 8) A mechanical variable-seed drive as herein described with reference to the foregoing description and the accompanying drawings.

Documents:

1070-del-2001-abstract.pdf

1070-del-2001-claims.pdf

1070-del-2001-Correspondence-Others-(18-03-2010).pdf

1070-del-2001-correspondence-others.pdf

1070-del-2001-correspondence-po.pdf

1070-del-2001-description (complete).pdf

1070-del-2001-drawings.pdf

1070-del-2001-form-1.pdf

1070-del-2001-form-18.pdf

1070-del-2001-form-2.pdf

1070-del-2001-form-3.pdf

1070-del-2001-form-5.pdf

1070-del-2001-petition-137.pdf

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