Power plants – Pressure fluid source and motor – Pulsator
Patent
1990-09-20
1991-11-05
Look, Edward K.
Power plants
Pressure fluid source and motor
Pulsator
60583, 60593, 60567, 91519, 92107, 92151, F15B 700
Patent
active
050622684
ABSTRACT:
A hydraulic actuator is formed by a first element incorporating a plurality of different sized piston cavities by a first set of piston elements which cooperate with a second set of piston elements and piston cavities respectively formed on a second element. Each of the cavities is selectively connected to a source of high pressure fluid or a source of low pressure fluid. The second element forms a driven piston in a cylinder formed by an extension of the first element. A second cylinder of a cross sectional area different from the first cylinder is hydrulically connected to the first cylinder and incorporates a second piston at its end remote from the first piston. The force or distance travelled by the second piston is correlated with that of the first or driven piston in a ratio equal to the ratio of the cross sectional areas of the two pistons. Preferably the second piston will be a double acting piston so that pressure may be applied to force the driven piston and first element together.
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Look Edward K.
Mattingly Todd
Rowley C. A.
The University of British Columbia
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