Accession Number : ADD014268

Title :   Continuously Variable Gear Drive Transmission.

Descriptive Note : Patent filed 20 May 87, patented 8 Aug 89,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Won, Vann Y

Report Date : 08 Aug 1989

Pagination or Media Count : 14

Abstract : The invention comprises an all gear transmission mechanism capable of producing a wide range of speed outputs, including very high torque at low speed and very high speed at low torque. This result is provided by a combination of epicyclic gearing and differential gearing. The invention also includes an all gear feedback mechanism for sustaining desired operating speeds and torques as well as for performing rapid changes in gear ratio that produce rapid acceleration and deceleration of output shaft rotation. The invention comprises an all gear mechanism for a continuously variable transmission that provides a wide range of output speeds and torques. The Basic element of the transmission is a floating gear assembly can either comprise a floating gearbox or a floating gear arrangement incorporated into a differential assembly with idler gears. Various controlling mechanisms are shown and described which include first and second mechanical feedback loops. With these speed control systems, the output gear ratio can be made to change either linearly to geometrically to produce a desired output speed and torque. Patents. (kr)

Descriptors :   *TRANSMISSION GEARS, *DRIVES, *PATENTS, ASSEMBLY, CONTROL SYSTEMS, DECELERATION, FEEDBACK, FLOATING BODIES, GEARBOXES, HIGH ACCELERATION, HIGH VELOCITY, LOW VELOCITY, OUTPUT, RANGE(EXTREMES), RATIOS, ROTATION, SHAFTS(MACHINE ELEMENTS), SPEED REGULATORS, TORQUE, TRANSMITTANCE, VELOCITY

Subject Categories : Surface Transportation and Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE