Continuously variable transmissions, systems and methods

US10458526B2 · kind B2 · utility

Assignee

• Fallbrook Intellectual Property Company LLC · US

Inventors

• Jon M. Nichols · Georgetown, US
• Brian Benjamin Sweet · Leander, US
• Brad P. Pohl · Leander, US
• Fernand A. Thomassy · Leander, US
• William J. Elliott, IV · Holden, US
• David Galvin · Thousand Oaks, US
• Daniel J. Dawe · Austin, US
• David Brian Jackson · Spanish Fork, US
• Wayne Leroy Contello · Austin, US

Key dates

• Filing date: Mar 17, 2017
• Grant date: Oct 29, 2019
• Expiry date: Aug 23, 2037

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H61/6646
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Components, subassemblies, systems, and/or methods for improving the performance and increasing the life of continuously variable transmissions (CVT). A first stator may be formed with an outer diameter greater than an outer diameter of a second stator. A stator may have radial slots formed to extend farther radially inward than slots on the other stator. The larger outer diameter of a stator or the formation of guide slots on a first stator extending farther radially inward of guide slots on a second stator may prevent egress of a planet axle from a radial slot, increase range of the CVT, allow for larger tolerances to reduce losses, and other advantages, Slots on a timing plate may be formed having a width greater than a width of guide slots formed on either stator to allow the stators to control adjustments while the timing plate avoids runaway axles. The shape, including junction between surfaces on a timing plate or stator may also prevent an axle from egressing. Any one or a combination of these features allow a CVT to be formed smaller and lighter to allow for clearance in smaller environments and for reduced inertia.