Power plants – Pressure fluid source and motor – Utilizing a mixture – suspension – semisolid or...
Patent
1976-08-05
1977-12-13
Geoghegan, Edgar W.
Power plants
Pressure fluid source and motor
Utilizing a mixture, suspension, semisolid or...
60327, 60336, 60486, 60905, F16D 3302
Patent
active
040621871
ABSTRACT:
The hoist drum of a mobile crane employs a controllable kinetics torque converter for transmitting power from a prime mover to the hoist drum. Apparatus and method are provided for controllably varying the density of the working fluid in the torque converter to regulate the capacity thereof and for keeping the variable density working fluid above a predetermined pressure level so as to prevent unwanted cavitation. The apparatus comprises means for supplying to the torque converter a working fluid comprising a mixture of liquid and gas, means for maintaining the fluid above a predetermined pressure level to inhibit cavitation in the working fluid, and means for selectively varying the density of the working fluid to selectively vary the capacity of the torque converter by varying the volumetric proportions between the liquid and the gas. The method generally comprises the steps of supplying working fluid to a torque converter comprising a mixture of liquid and gas, varying the proportion of liquid to gas to vary the density of the working fluid and to vary the torque converter capacity, and maintaining the fluid above a predetermined pressure level to prevent cavitation in the working fluid.
REFERENCES:
patent: B261139 (1943-04-01), Waltenbauer
patent: 3063245 (1962-11-01), Rippy
patent: 3417565 (1968-12-01), Hanson et al.
Geoghegan Edgar W.
Harnischefeger Corporation
Nilles James E.
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