Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
222 words
A variable-ratio drive mechanism in which a pair of sheaves (64 and 68) each have a pair of facing belt-receiving discs (28,30 and 70,72) at least one of which is axially movable to vary the drive belt (66) radius, at least one disc (30) on one sheave (64) being axially movable by fluid pressure application thereto, characterised by a control lever (132) supported outboard said one sheave (64) for pivoting movement on axes normal to the plane of the rotary axes (14 and 16) of said sheaves (64 and 68) and having one end (134) in slidable engagement with said one disc (30), a control actuator (142) located outboard said one sheave and in engagement with the control lever in a sense to cause the said one end to bear against said one disc for pivoting, the control actuator being movable in relation to the movement of said one disc so that the control lever is pivoted in accordance with joint movement of said one disc and the control actuator, and a fluid control valve (100) operatively connected to the control lever at a point outboard of said one disc and at a point spaced from the control actuator, the fluid control valve controlling fluid pressure to said one sheave to cause said one disc to follow movement of the control actuator.
Claim 2
Dependent Claim
222 words
A variable-ratio drive mechanism in which a pair of sheaves (64 and 68) each have a pair of facing belt-receiving discs (28,30 and 70,72) at least one of which is axially movable to vary the drive belt (66) radius, at least one disc (30) on one sheave (64) being axially movable by fluid pressure application thereto, characterised by a control lever (132) supported outboard said one sheave (64) for pivoting movement on axes normal to the plane of the rotary axes (14 and 16) of said sheaves (64 and 68) and having one end (134) in slidable engagement with said one disc (30), a control actuator (142) located outboard said one sheave and in engagement with the control lever in a sense to cause the said one end to bear against said one disc for pivoting, the control actuator being movable in relation to the movement of said one disc so that the control lever is pivoted in accordance with joint movement of said one disc and the control actuator, and a fluid control valve (100) operatively connected to the control lever at a point outboard of said one disc and at a point spaced from the control actuator, the fluid control valve controlling fluid pressure to said one sheave to cause said one disc to follow movement of the control actuator.
Claim 3
Dependent Claim
44 words
A variable-ratio drive mechanism according tocl a im l, characterised in that the drive belt (66) riding on the two sheaves (64 and 68) encompasses a space which is between the sheaves under all conditions, and the control lever (132)is located in said space.
Claim 4
Dependent Claim
33 words
A variable-ratio drive mechanism according to claim 2, characterised in that the control lever (132) is substantially on a line intersecting the rotary axes (14 and 16) of the sheaves (64 and 68).
Claim 5
Dependent Claim
39 words
A variable-ratio drive mechanism according to any one of claims 1 to 3, characterised in that the fluid control valve (100) is connected to the control lever (132) intermediate the said one end (134) and the control actuator (142).
Claim 6
Dependent Claim
58 words
A variable-ratio drive mechanism according to claim 4, characterised in that the fluid control valve (100) is connected to the control lever (132) by elements (112 and 130) engaging one side of the lever, and biased (128) against the lever, and that the one disc (30) and the control actuator (142) engage the other side of the lever.
Claim 7
Dependent Claim
37 words
A variable-ratio drive mechanism according to any one of claims 1 to 6, characterised in that the control-actuator (142) is a reciprocable actuator movable on an axis parallel to the rotary axis (14) of the disc (30).