Richard A Donnelly

US Patent:

48236403, Apr 25, 1989

Filed:

Oct 19, 1987

Appl. No.:

7/109416

Inventors:

Richard J. Donnelly - Santa Monica CA

International Classification:

F16H 4704
F16H 3706

US Classification:

74687

Abstract:

Variable-ratio transmission configurations are derived from a basic balanced-reaction configuration which is known to operate with inherently lower power flow in the reactive path for a given ratio range than the more common split-input or split-output configurations. A pair of planetary gear sets having different base speed ratios, are configured to each provide a power transmission path from the input shaft to the output shaft while the reaction gear elements are cross-coupled to each other through an auxiliary variable ratio power-transfer device. A particular two-planetary-set configuration uses the ring gear elements as the reactors, one mounted to rotate around the input shaft and the other mounted to rotate around the output shaft. The ring gears are thus readily coupled to an auxiliary variable ratio power-transfer device, which may be a pair of hydraulic pump/motors. For extended ratio range, three or more (n) differential gear sets are configured in parallel input/output power paths, to be selected in pairs in (n-1) different ratio ranges for connection through automatic hydraulic or clutch-type range-switching means acting in the reaction power paths.

Address:

264 N Hollywood Blvd, Las Vegas, NV 89110

Phone:

7024385917

VIN:

1N4AL24E18C281044

Make:

NISSAN

Model:

ALTIMA

Year:

2008

Address:

7101 Smoke Rnch Rd APT 2079, Las Vegas, NV 89128

VIN:

1N4BL21E87N462041

Make:

NISSAN

Model:

ALTIMA

Year:

2007