Power plants – Pressure fluid source and motor – Pulsator
Patent
1991-09-06
1993-03-30
Look, Edward K.
Power plants
Pressure fluid source and motor
Pulsator
60567, 60581, 60591, 92110, 91224, 91226, 91234, 91235, 91397, B60T 1120
Patent
active
051972859
ABSTRACT:
A modular digital actuator is formed by interconnecting a plurality of modules. Each of the modules includes a housing having a pair of different sized axially extending cylinder sections in which is received a T-shaped piston with the top of the T mating with the larger cylinder and the leg of the T forming a piston in the smaller cylinder. The leg of the T is hollow and forms a cylinder to receive an axially extending piston forming shaft to thereby provide three preferably different sized cooperating piston and cylinder areas, one formed in the cavity or hollows of the leg of the T, a second formed between the top of the T surrounding the leg of the T and the junction between the larger cylinder section and smaller cylinder section and the third formed in the smaller cylinder section between a closed free end of the smaller cylinder section and the leg of the T surrounding the piston forming shaft. The top of the T forms a piston wall in a fourth hydraulic cavity. Several of these modules may be interconnected by positioning same in axial relationship with the end closure of the smaller cylinder of the second module forming an end closure for the larger cylinder of the first module and the large cylinder in the first module on the top side of the T connected to the cavity forming cylinder of the second module via a passage through the piston forming shaft of the second module. The areas of the different pistons and cylinders formed in the second module may be different from those in the first module.
REFERENCES:
patent: 1142551 (1915-06-01), Burnhart
patent: 1499569 (1924-01-01), Bailly
patent: 2727467 (1955-12-01), Russell
patent: 2862478 (1958-12-01), Staats
patent: 3407601 (1968-10-01), Beck
patent: 3603207 (1971-09-01), Parrett
patent: 4505115 (1985-03-01), Arbuckle
patent: 4602481 (1986-07-01), Robinson
patent: 4922719 (1990-05-01), Arbuckle
patent: 5063828 (1991-11-01), Kamimura
Graphic Symbols for Fluid Power Diagrams, pp. 7 and 12, The ASME, 1973.
Look Edward K.
Mattingly Todd
Rowley C. A.
The University of British Columbia
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