Hydromechanical transmission with two planetary assemblies that are clutchable to both the input and output shafts

Patent · Mon Jan 01 00:00:00 EST 1979

OSTI ID:863256

Weseloh, William E ^[1]

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1. San Diego, CA

A power transmission having two planetary assemblies, each having its own carrier and its own planet, sun, and ring gears. A speed-varying module is connected in driving relation to the input shaft and in driving relationship to the two sun gears, which are connected together. The speed-varying means may comprise a pair of hydraulic units hydraulically interconnected so that one serves as a pump while the other serves as a motor and vice versa, one of the units having a variable stroke and being connected in driving relation to the input shaft, the other unit, which may have a fixed stroke, being connected in driving relation to the sun gears. A brake grounds the first carrier in the first range and in reverse and causes drive to be delivered to the output shaft through the first ring gear in a hydrostatic mode, the first ring gear being rigidly connected to the output shaft. The input shaft also is clutchable to either the carrier or the ring gear of the second planetary assembly. The output shaft is also clutchable to the carrier of the second planetary assembly when the input is clutched to the ring gear of the second planetary assembly, and is clutchable to the ring gear of the second planetary assembly when the input is clutched to the carrier thereof.

• Research Organization: Orshansky Transmission Corp., San Diego, CA (USA)
• DOE Contract Number: EY-76-C-03-1165
• Assignee: Orshansky Transmission Corporation (New York, NY)
• Patent Number(s): US 4134311
• OSTI ID: 863256
• Country of Publication: United States
• Language: English

Related Subjects

hydromechanical
transmission
planetary
assemblies
clutchable
input
output
shafts
power
carrier
planet
sun
gears
speed-varying
module
connected
driving
relation
shaft
relationship
means
comprise
pair
hydraulic
units
hydraulically
interconnected
serves
pump
motor
vice
versa
variable
stroke
unit
fixed
brake
grounds
range
reverse
causes
drive
delivered
gear
hydrostatic
mode
rigidly
assembly
clutched
speed-varying module
speed-varying means
units hydraulically
brake grounds
output shafts
causes drive
hydrostatic mode
hydraulic units
fixed stroke
hydraulically interconnected
sun gear
power transmission
driving relation
output shaft
input shaft
planetary assembly
planetary assemblies
driving relationship
sun gears
variable stroke
vice versa
rigidly connected
hydromechanical transmission
hydraulic unit
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