Pitch transfer gear and transmissions

Details Pitch transfer gear and transmissions Pitch transfer gear and transmissions

2006-04-18

2006-04-18

Lewis, Tisha (Department: 3681)

Machine element or mechanism

Gearing

Varying speed ratio

C074S395000, C074S340000, C074S460000

Reexamination Certificate

active

07028572

ABSTRACT:
A pitch transfer gear transmission which enables drive to be transmitted from a gear of having one modulus (42) to a gear having another modulus (46) includes at least two gears (12,16) which have a different number of teeth and which are able to rotate relative to one another, so that the teeth of the two gears (12,16) can form a gear modulus of a first value at one part of the periphery of the gear, and a gear modulus of another value at another part of the periphery of the gear. Continuously variable transmissions are formed by providing an input or output gear (42,46) which has a modulus which varies along the length of the gear. Pitch transfer gear assembly (30) engages with the input or output gear (42,46), and is moveable by a mechanism (59) along the length of the gear changing modulus, so as to set the drive ratio of the transmission.

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patent: 3049230 (1982-07-01), None
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patent: WO 95/33146 (1999-12-01), None
patent: WO 02/093036 (2002-11-01), None

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