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US 12,736,118 B2Granted
Rotary element for transmitting rotary motion
OwnerRichard Dobleinventor
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OwnerRichard Dobleinventor
Estimating the term…
A rotary element for a rotary transmission has a helical radial projection disposed about a rotary axis thereof, the helical radial projection having leading and trailing edges of different diameter. A helical peripheral surface between the leading and trailing edges has a radial profile which is inclined to a tangent to the envelope and preferably has an elliptic profile in a radial plane. In use with another such rotary element having a helical radial projection of opposite handedness in a rotary transmission, a point (P) of rolling contact of the helical peripheral surface with a helical peripheral surface of the other such rotary element helically traverses the helical peripheral surfaces of both rotary elements to positively transmit rotary drive between them without interdigitation of their respective helical radial projections and the associated sliding friction between them as arising in a gear transmission.
A rotary element for a rotary transmission, the rotary element having at least one helical radial projection disposed about a rotary axis thereof, the helical radial projection having a helical peripheral surface which defines an envelope of the rotary element, the helical peripheral surface having a profile in a radial plane which is inclined to a tangent to said envelope, whereby in use with another such rotary element having a helical radial projection of opposite handedness in the rotary transmission, a region of rolling contact of the helical peripheral surface with a helical peripheral surface of the other such rotary element helically traverses the helical peripheral surfaces to positively transmit rotary drive between the rotary elements.
A rotary drive arrangement comprising first and second mutually engaged rotary elements mounted for rotation about respective rotary axes thereof and having helical radial projections disposed about the respective rotary axes of the rotary elements, the helical radial projections being of opposite handedness, the helical radial projection of each rotary element having a helical peripheral surface which defines an envelope of that rotary element, the helical peripheral surface having a profile in a radial plane which is inclined to a tangent to said envelope, wherein in use a region of rolling contact of the respective helical peripheral surfaces helically traverses the helical peripheral surfaces to positively transmit rotary drive between the rotary elements.
A rotary element for a rotary transmission, the rotary element having at least one helical radial projection disposed about a rotary axis thereof, the helical radial projection having a helical peripheral surface, the helical peripheral surface having a profile in a radial plane which is asymmetric, whereby in use with another such rotary element of opposite handedness in the rotary transmission, a region of rolling contact of the helical peripheral surface with a helical peripheral surface of the other such rotary element helically traverses the helical peripheral surfaces to positively transmit rotary drive between the rotary elements without interdigitation of their respective helical radial projections.
A rotary drive arrangement comprising first and second rotary elements mounted for rotation about respective rotary axes thereof and having helical radial projections disposed about the respective rotary axes of the rotary elements, the rotary elements being of opposite handedness, the helical projections having respective helical peripheral surfaces, each of which surfaces has a profile in a radial plane which is asymmetric, wherein in use a region of rolling contact of the respective helical peripheral surfaces helically traverses the helical peripheral surfaces to positively transmit rotary drive between the rotary elements without interdigitation of their respective helical radial projections.
Dependencies are inferred from the claim text.